Parametric potentiometers added, changes PCB "potentiometer" parameters.

The first one is now the type that defaults to the previous BigTreeTech version. The second parameter is the shaft length overrride. Added ESP32_DOIT_V1, ArduinoNano and KY_040 breakout PCBs.
2025-01-17 05:28:14 +01:00 · 2021-09-11 12:01:04 +01:00 · 2021-09-11 12:01:04 +01:00 · 3299aad5c8
commit 3299aad5c8
parent 74c52aac04
13 changed files with 441 additions and 81 deletions
--- a/libtest.png
+++ b/libtest.png
--- a/libtest.scad
+++ b/libtest.scad
@ -41,6 +41,7 @@
 //
 include <lib.scad>

+use <tests/7_segments.scad>
 use <tests/ball_bearings.scad>
 use <tests/batteries.scad>
 use <tests/bearing_blocks.scad>
@ -83,6 +84,7 @@ use <tests/panel_meters.scad>
 use <tests/PCBs.scad>
 use <tests/pillars.scad>
 use <tests/pillow_blocks.scad>
+use <tests/potentiometers.scad>
 use <tests/press_fit.scad>
 use <tests/PSUs.scad>
 use <tests/pulleys.scad>
@ -212,8 +214,8 @@ linear_bearings_y = leadnuts_y + 50;
 steppers_y = linear_bearings_y + 110;
 sheets_y = steppers_y + 55;
 pcbs_y = sheets_y + 60;
-displays_y = pcbs_y + 170;
-fans_y = displays_y + 80;
+displays_y = pcbs_y + 140;
+fans_y = displays_y + 110;
 transformers_y = fans_y + 120;
 psus_y = transformers_y + 190;

@ -427,9 +429,10 @@ extrusion_brackets_y = rails_y + 250;
 sk_brackets_y = extrusion_brackets_y + 80;
 kp_pillow_blocks_y = sk_brackets_y + 60;
 scs_bearing_blocks_y = kp_pillow_blocks_y + 60;
-cable_strip_y = sheets_y;
 box_sections_y = batteries_y;
-BLDC_y = steppers_y;
+BLDC_y = scs_bearing_blocks_y + 120;
+pot_y = BLDC_y + 40;
+cable_strip_y = pot_y + 50;

 translate([0, transformers_y])
    servo_motors();
@ -468,6 +471,9 @@ translate([x4, scs_bearing_blocks_y])
 translate([x4, BLDC_y])
    bldc_motors();

+translate([x4, pot_y])
+    potentiometers();
+
 translate([x2, box_sections_y])
    box_sections();

--- a/readme.md
+++ b/readme.md
@ -21,31 +21,32 @@ A list of changes classified as breaking, additions or fixes is maintained in [C
 ## Table of Contents<a name="top"/>
 <table><tr>
 <th align="left"> Vitamins A-H </th><th align="left"> Vitamins I-Q </th><th align="left"> Vitamins R-Z </th><th align="left"> Printed </th><th align="left"> Utilities </th><th align="left"> Core Utilities </th></tr>
-<tr><td> <a href = "#Axials">Axials</a> </td><td> <a href = "#IECs">IECs</a> </td><td> <a href = "#Rails">Rails</a> </td><td> <a href = "#Box">Box</a> </td><td> <a href = "#Annotation">Annotation</a> </td><td> <a href = "#BOM">BOM</a> </td></tr>
-<tr><td> <a href = "#BLDC_motors">BLDC_motors</a> </td><td> <a href = "#Inserts">Inserts</a> </td><td> <a href = "#Ring_terminals">Ring_terminals</a> </td><td> <a href = "#Butt_box">Butt_box</a> </td><td> <a href = "#Bezier">Bezier</a> </td><td> <a href = "#Clip">Clip</a> </td></tr>
-<tr><td> <a href = "#Ball_bearings">Ball_bearings</a> </td><td> <a href = "#Jack">Jack</a> </td><td> <a href = "#Rockers">Rockers</a> </td><td> <a href = "#Cable_grommets">Cable_grommets</a> </td><td> <a href = "#Catenary">Catenary</a> </td><td> <a href = "#Global">Global</a> </td></tr>
-<tr><td> <a href = "#Batteries">Batteries</a> </td><td> <a href = "#LDRs">LDRs</a> </td><td> <a href = "#Rod">Rod</a> </td><td> <a href = "#Camera_housing">Camera_housing</a> </td><td> <a href = "#Core_xy">Core_xy</a> </td><td> <a href = "#Polyholes">Polyholes</a> </td></tr>
-<tr><td> <a href = "#Bearing_blocks">Bearing_blocks</a> </td><td> <a href = "#LED_meters">LED_meters</a> </td><td> <a href = "#SK_brackets">SK_brackets</a> </td><td> <a href = "#Carriers">Carriers</a> </td><td> <a href = "#Dogbones">Dogbones</a> </td><td> <a href = "#Rounded_rectangle">Rounded_rectangle</a> </td></tr>
-<tr><td> <a href = "#Belts">Belts</a> </td><td> <a href = "#LEDs">LEDs</a> </td><td> <a href = "#SMDs">SMDs</a> </td><td> <a href = "#Corner_block">Corner_block</a> </td><td> <a href = "#Fillet">Fillet</a> </td><td> <a href = "#Sphere">Sphere</a> </td></tr>
-<tr><td> <a href = "#Blowers">Blowers</a> </td><td> <a href = "#Leadnuts">Leadnuts</a> </td><td> <a href = "#SSRs">SSRs</a> </td><td> <a href = "#Door_hinge">Door_hinge</a> </td><td> <a href = "#Gears">Gears</a> </td><td> <a href = "#Teardrops">Teardrops</a> </td></tr>
-<tr><td> <a href = "#Box_sections">Box_sections</a> </td><td> <a href = "#Light_strips">Light_strips</a> </td><td> <a href = "#Screws">Screws</a> </td><td> <a href = "#Door_latch">Door_latch</a> </td><td> <a href = "#Hanging_hole">Hanging_hole</a> </td><td></td></tr>
-<tr><td> <a href = "#Bulldogs">Bulldogs</a> </td><td> <a href = "#Linear_bearings">Linear_bearings</a> </td><td> <a href = "#Sealing_strip">Sealing_strip</a> </td><td> <a href = "#Drag_chain">Drag_chain</a> </td><td> <a href = "#Horiholes">Horiholes</a> </td><td></td></tr>
-<tr><td> <a href = "#Buttons">Buttons</a> </td><td> <a href = "#Magnets">Magnets</a> </td><td> <a href = "#Servo_motors">Servo_motors</a> </td><td> <a href = "#Fan_guard">Fan_guard</a> </td><td> <a href = "#Layout">Layout</a> </td><td></td></tr>
-<tr><td> <a href = "#Cable_strips">Cable_strips</a> </td><td> <a href = "#Mains_sockets">Mains_sockets</a> </td><td> <a href = "#Shaft_couplings">Shaft_couplings</a> </td><td> <a href = "#Fixing_block">Fixing_block</a> </td><td> <a href = "#Maths">Maths</a> </td><td></td></tr>
-<tr><td> <a href = "#Cameras">Cameras</a> </td><td> <a href = "#Microswitches">Microswitches</a> </td><td> <a href = "#Sheets">Sheets</a> </td><td> <a href = "#Flat_hinge">Flat_hinge</a> </td><td> <a href = "#Offset">Offset</a> </td><td></td></tr>
-<tr><td> <a href = "#Circlips">Circlips</a> </td><td> <a href = "#Microview">Microview</a> </td><td> <a href = "#Spades">Spades</a> </td><td> <a href = "#Foot">Foot</a> </td><td> <a href = "#Quadrant">Quadrant</a> </td><td></td></tr>
-<tr><td> <a href = "#Components">Components</a> </td><td> <a href = "#Modules">Modules</a> </td><td> <a href = "#Spools">Spools</a> </td><td> <a href = "#Handle">Handle</a> </td><td> <a href = "#Round">Round</a> </td><td></td></tr>
-<tr><td> <a href = "#DIP">DIP</a> </td><td> <a href = "#Nuts">Nuts</a> </td><td> <a href = "#Springs">Springs</a> </td><td> <a href = "#PCB_mount">PCB_mount</a> </td><td> <a href = "#Rounded_cylinder">Rounded_cylinder</a> </td><td></td></tr>
-<tr><td> <a href = "#D_connectors">D_connectors</a> </td><td> <a href = "#O_ring">O_ring</a> </td><td> <a href = "#Stepper_motors">Stepper_motors</a> </td><td> <a href = "#PSU_shroud">PSU_shroud</a> </td><td> <a href = "#Rounded_polygon">Rounded_polygon</a> </td><td></td></tr>
-<tr><td> <a href = "#Displays">Displays</a> </td><td> <a href = "#Opengrab">Opengrab</a> </td><td> <a href = "#Swiss_clips">Swiss_clips</a> </td><td> <a href = "#Pocket_handle">Pocket_handle</a> </td><td> <a href = "#Rounded_triangle">Rounded_triangle</a> </td><td></td></tr>
-<tr><td> <a href = "#Extrusion_brackets">Extrusion_brackets</a> </td><td> <a href = "#PCB">PCB</a> </td><td> <a href = "#Toggles">Toggles</a> </td><td> <a href = "#Press_fit">Press_fit</a> </td><td> <a href = "#Sector">Sector</a> </td><td></td></tr>
-<tr><td> <a href = "#Extrusions">Extrusions</a> </td><td> <a href = "#PCBs">PCBs</a> </td><td> <a href = "#Transformers">Transformers</a> </td><td> <a href = "#Printed_box">Printed_box</a> </td><td> <a href = "#Sweep">Sweep</a> </td><td></td></tr>
-<tr><td> <a href = "#Fans">Fans</a> </td><td> <a href = "#PSUs">PSUs</a> </td><td> <a href = "#Tubings">Tubings</a> </td><td> <a href = "#Printed_pulleys">Printed_pulleys</a> </td><td> <a href = "#Thread">Thread</a> </td><td></td></tr>
-<tr><td> <a href = "#Fuseholder">Fuseholder</a> </td><td> <a href = "#Panel_meters">Panel_meters</a> </td><td> <a href = "#Variacs">Variacs</a> </td><td> <a href = "#Ribbon_clamp">Ribbon_clamp</a> </td><td> <a href = "#Tube">Tube</a> </td><td></td></tr>
-<tr><td> <a href = "#Geared_steppers">Geared_steppers</a> </td><td> <a href = "#Pillars">Pillars</a> </td><td> <a href = "#Veroboard">Veroboard</a> </td><td> <a href = "#SSR_shroud">SSR_shroud</a> </td><td></td><td></td></tr>
-<tr><td> <a href = "#Green_terminals">Green_terminals</a> </td><td> <a href = "#Pillow_blocks">Pillow_blocks</a> </td><td> <a href = "#Washers">Washers</a> </td><td> <a href = "#Screw_knob">Screw_knob</a> </td><td></td><td></td></tr>
-<tr><td> <a href = "#Hot_ends">Hot_ends</a> </td><td> <a href = "#Pin_headers">Pin_headers</a> </td><td> <a href = "#Wire">Wire</a> </td><td> <a href = "#Socket_box">Socket_box</a> </td><td></td><td></td></tr>
-<tr><td> <a href = "#Hygrometer">Hygrometer</a> </td><td> <a href = "#Pulleys">Pulleys</a> </td><td> <a href = "#Zipties">Zipties</a> </td><td> <a href = "#Strap_handle">Strap_handle</a> </td><td></td><td></td></tr>
+<tr><td> <a href = "#7_segments">7_segments</a> </td><td> <a href = "#IECs">IECs</a> </td><td> <a href = "#Rails">Rails</a> </td><td> <a href = "#Box">Box</a> </td><td> <a href = "#Annotation">Annotation</a> </td><td> <a href = "#BOM">BOM</a> </td></tr>
+<tr><td> <a href = "#Axials">Axials</a> </td><td> <a href = "#Inserts">Inserts</a> </td><td> <a href = "#Ring_terminals">Ring_terminals</a> </td><td> <a href = "#Butt_box">Butt_box</a> </td><td> <a href = "#Bezier">Bezier</a> </td><td> <a href = "#Clip">Clip</a> </td></tr>
+<tr><td> <a href = "#BLDC_motors">BLDC_motors</a> </td><td> <a href = "#Jack">Jack</a> </td><td> <a href = "#Rockers">Rockers</a> </td><td> <a href = "#Cable_grommets">Cable_grommets</a> </td><td> <a href = "#Catenary">Catenary</a> </td><td> <a href = "#Global">Global</a> </td></tr>
+<tr><td> <a href = "#Ball_bearings">Ball_bearings</a> </td><td> <a href = "#LDRs">LDRs</a> </td><td> <a href = "#Rod">Rod</a> </td><td> <a href = "#Camera_housing">Camera_housing</a> </td><td> <a href = "#Core_xy">Core_xy</a> </td><td> <a href = "#Polyholes">Polyholes</a> </td></tr>
+<tr><td> <a href = "#Batteries">Batteries</a> </td><td> <a href = "#LED_meters">LED_meters</a> </td><td> <a href = "#SK_brackets">SK_brackets</a> </td><td> <a href = "#Carriers">Carriers</a> </td><td> <a href = "#Dogbones">Dogbones</a> </td><td> <a href = "#Rounded_rectangle">Rounded_rectangle</a> </td></tr>
+<tr><td> <a href = "#Bearing_blocks">Bearing_blocks</a> </td><td> <a href = "#LEDs">LEDs</a> </td><td> <a href = "#SMDs">SMDs</a> </td><td> <a href = "#Corner_block">Corner_block</a> </td><td> <a href = "#Fillet">Fillet</a> </td><td> <a href = "#Sphere">Sphere</a> </td></tr>
+<tr><td> <a href = "#Belts">Belts</a> </td><td> <a href = "#Leadnuts">Leadnuts</a> </td><td> <a href = "#SSRs">SSRs</a> </td><td> <a href = "#Door_hinge">Door_hinge</a> </td><td> <a href = "#Gears">Gears</a> </td><td> <a href = "#Teardrops">Teardrops</a> </td></tr>
+<tr><td> <a href = "#Blowers">Blowers</a> </td><td> <a href = "#Light_strips">Light_strips</a> </td><td> <a href = "#Screws">Screws</a> </td><td> <a href = "#Door_latch">Door_latch</a> </td><td> <a href = "#Hanging_hole">Hanging_hole</a> </td><td></td></tr>
+<tr><td> <a href = "#Box_sections">Box_sections</a> </td><td> <a href = "#Linear_bearings">Linear_bearings</a> </td><td> <a href = "#Sealing_strip">Sealing_strip</a> </td><td> <a href = "#Drag_chain">Drag_chain</a> </td><td> <a href = "#Horiholes">Horiholes</a> </td><td></td></tr>
+<tr><td> <a href = "#Bulldogs">Bulldogs</a> </td><td> <a href = "#Magnets">Magnets</a> </td><td> <a href = "#Servo_motors">Servo_motors</a> </td><td> <a href = "#Fan_guard">Fan_guard</a> </td><td> <a href = "#Layout">Layout</a> </td><td></td></tr>
+<tr><td> <a href = "#Buttons">Buttons</a> </td><td> <a href = "#Mains_sockets">Mains_sockets</a> </td><td> <a href = "#Shaft_couplings">Shaft_couplings</a> </td><td> <a href = "#Fixing_block">Fixing_block</a> </td><td> <a href = "#Maths">Maths</a> </td><td></td></tr>
+<tr><td> <a href = "#Cable_strips">Cable_strips</a> </td><td> <a href = "#Microswitches">Microswitches</a> </td><td> <a href = "#Sheets">Sheets</a> </td><td> <a href = "#Flat_hinge">Flat_hinge</a> </td><td> <a href = "#Offset">Offset</a> </td><td></td></tr>
+<tr><td> <a href = "#Cameras">Cameras</a> </td><td> <a href = "#Microview">Microview</a> </td><td> <a href = "#Spades">Spades</a> </td><td> <a href = "#Foot">Foot</a> </td><td> <a href = "#Quadrant">Quadrant</a> </td><td></td></tr>
+<tr><td> <a href = "#Circlips">Circlips</a> </td><td> <a href = "#Modules">Modules</a> </td><td> <a href = "#Spools">Spools</a> </td><td> <a href = "#Handle">Handle</a> </td><td> <a href = "#Round">Round</a> </td><td></td></tr>
+<tr><td> <a href = "#Components">Components</a> </td><td> <a href = "#Nuts">Nuts</a> </td><td> <a href = "#Springs">Springs</a> </td><td> <a href = "#PCB_mount">PCB_mount</a> </td><td> <a href = "#Rounded_cylinder">Rounded_cylinder</a> </td><td></td></tr>
+<tr><td> <a href = "#DIP">DIP</a> </td><td> <a href = "#O_ring">O_ring</a> </td><td> <a href = "#Stepper_motors">Stepper_motors</a> </td><td> <a href = "#PSU_shroud">PSU_shroud</a> </td><td> <a href = "#Rounded_polygon">Rounded_polygon</a> </td><td></td></tr>
+<tr><td> <a href = "#D_connectors">D_connectors</a> </td><td> <a href = "#Opengrab">Opengrab</a> </td><td> <a href = "#Swiss_clips">Swiss_clips</a> </td><td> <a href = "#Pocket_handle">Pocket_handle</a> </td><td> <a href = "#Rounded_triangle">Rounded_triangle</a> </td><td></td></tr>
+<tr><td> <a href = "#Displays">Displays</a> </td><td> <a href = "#PCB">PCB</a> </td><td> <a href = "#Toggles">Toggles</a> </td><td> <a href = "#Press_fit">Press_fit</a> </td><td> <a href = "#Sector">Sector</a> </td><td></td></tr>
+<tr><td> <a href = "#Extrusion_brackets">Extrusion_brackets</a> </td><td> <a href = "#PCBs">PCBs</a> </td><td> <a href = "#Transformers">Transformers</a> </td><td> <a href = "#Printed_box">Printed_box</a> </td><td> <a href = "#Sweep">Sweep</a> </td><td></td></tr>
+<tr><td> <a href = "#Extrusions">Extrusions</a> </td><td> <a href = "#PSUs">PSUs</a> </td><td> <a href = "#Tubings">Tubings</a> </td><td> <a href = "#Printed_pulleys">Printed_pulleys</a> </td><td> <a href = "#Thread">Thread</a> </td><td></td></tr>
+<tr><td> <a href = "#Fans">Fans</a> </td><td> <a href = "#Panel_meters">Panel_meters</a> </td><td> <a href = "#Variacs">Variacs</a> </td><td> <a href = "#Ribbon_clamp">Ribbon_clamp</a> </td><td> <a href = "#Tube">Tube</a> </td><td></td></tr>
+<tr><td> <a href = "#Fuseholder">Fuseholder</a> </td><td> <a href = "#Pillars">Pillars</a> </td><td> <a href = "#Veroboard">Veroboard</a> </td><td> <a href = "#SSR_shroud">SSR_shroud</a> </td><td></td><td></td></tr>
+<tr><td> <a href = "#Geared_steppers">Geared_steppers</a> </td><td> <a href = "#Pillow_blocks">Pillow_blocks</a> </td><td> <a href = "#Washers">Washers</a> </td><td> <a href = "#Screw_knob">Screw_knob</a> </td><td></td><td></td></tr>
+<tr><td> <a href = "#Green_terminals">Green_terminals</a> </td><td> <a href = "#Pin_headers">Pin_headers</a> </td><td> <a href = "#Wire">Wire</a> </td><td> <a href = "#Socket_box">Socket_box</a> </td><td></td><td></td></tr>
+<tr><td> <a href = "#Hot_ends">Hot_ends</a> </td><td> <a href = "#Potentiometers">Potentiometers</a> </td><td> <a href = "#Zipties">Zipties</a> </td><td> <a href = "#Strap_handle">Strap_handle</a> </td><td></td><td></td></tr>
+<tr><td> <a href = "#Hygrometer">Hygrometer</a> </td><td> <a href = "#Pulleys">Pulleys</a> </td><td></td><td></td><td></td><td></td></tr>
 </table>

 ---
@ -2520,18 +2521,21 @@ PCBs and perfboard with optional components. The shape can be a rectangle with o
 | Qty | Module call | BOM entry |
 | ---:|:--- |:---|
 |   1 | `pcb(ArduinoLeonardo)` |  Arduino Leonardo |
+|   1 | `pcb(ArduinoNano)` |  Arduino Nano |
 |   1 | `pcb(ArduinoUno3)` |  Arduino Uno R3 |
 |   1 | `pcb(BTT_SKR_E3_TURBO)` |  BigTreeTech SKR E3 Turbo |
 |   1 | `pcb(BTT_SKR_MINI_E3_V2_0)` |  BigTreeTech SKR Mini E3 v2.0 |
 |   1 | `pcb(BTT_SKR_V1_4_TURBO)` |  BigTreeTech SKR v1.4 Turbo |
 |   1 |  |  Cat 5 patch cable 300mm |
-|   1 | `d_plug(DCONN15, pcb = true)` |  D-type 15 way PCB mount plug |
+|   1 | `d_plug(DCONN15, pcb = true)` |  D-type 15 way PCB mount plug - not shown |
 |   1 | `pcb(DuetE)` |  Duet 2 Ethernet electronics |
 |   1 | `pcb(Duex2)` |  Duex2 expansion board - not shown |
 |   1 | `pcb(Duex5)` |  Duex5 expansion board |
 |   1 | `pcb(ESP-01)` |  ESP-01 |
+|   1 | `pcb(ESP32_DOIT_V1)` |  ESP32 DOIT DEV KIT V1 |
 |   1 | `pcb(EnviroPlus)` |  Enviro+ |
-|   1 | `pcb(ExtruderPCB)` |  Extruder connection PCB |
+|   1 | `pcb(ExtruderPCB)` |  Extruder connection PCB - not shown |
+|   1 | `pcb(KY_040)` |  KY_-040 rotart encoder breakout |
 |   1 | `pcb(Keyes5p1)` |  Keyes5.1 Arduino Uno expansion board - not shown |
 |   1 | `pcb(LIPO_fuel_gauge)` |  LIPO fuel gauge |
 |   1 | `pcb(MP1584EN)` |  MP1584EN 3A buck converter |
@ -2539,13 +2543,13 @@ PCBs and perfboard with optional components. The shape can be a rectangle with o
 |   1 | `pcb(Melzi)` |  Melzi electronics - not shown |
 |   4 |  |  Micro SD card |
 |   1 |  |  Micro SD card - not shown |
-|   1 | `molex_254(2)` |  Molex KK header 2 way |
-|   1 | `molex_254(3)` |  Molex KK header 3 way |
+|   1 | `molex_254(2)` |  Molex KK header 2 way - not shown |
+|   1 | `molex_254(3)` |  Molex KK header 3 way - not shown |
 |  20 | `nut(M2_nut, nyloc = true)` |  Nut M2 x 1.6mm nyloc |
 |  30 | `nut(M2p5_nut, nyloc = true)` |  Nut M2.5 x 2.2mm nyloc |
-|  26 | `nut(M3_nut, nyloc = true)` |  Nut M3 x 2.4mm nyloc |
+|  28 | `nut(M3_nut, nyloc = true)` |  Nut M3 x 2.4mm nyloc |
 |   8 | `nut(M4_nut, nyloc = true)` |  Nut M4 x 3.2mm nyloc |
-|   1 | `pcb(PI_IO)` |  PI_IO V2 |
+|   1 | `pcb(PI_IO)` |  PI_IO V2 - not shown |
 |   1 | `pcb(PSU12V1A)` |  PSU 12V 1A - not shown |
 |   1 | `pcb(PERF60x40)` |  Perfboard 60 x 40mm |
 |   1 | `pcb(PERF70x30)` |  Perfboard 70 x 30mm |
@ -2553,7 +2557,7 @@ PCBs and perfboard with optional components. The shape can be a rectangle with o
 |   1 | `pcb(PERF70x51)` |  Perfboard 70 x 51mm |
 |   1 | `pcb(PERF74x51)` |  Perfboard 74 x 51mm |
 |   1 | `pcb(PERF80x20)` |  Perfboard 80 x 20mm |
-|   1 | `pin_socket(2p54header, 13, 2, right_angle = true)` |  Pin socket 13 x 2 right_angle |
+|   1 | `pin_socket(2p54header, 13, 2, right_angle = true)` |  Pin socket 13 x 2 right_angle - not shown |
 |   1 | `pcb(RAMPSEndstop)` |  RAMPS Endstop Switch |
 |   1 | `pcb(RPI3)` |  Raspberry Pi 3 |
 |   1 | `pcb(RPI4)` |  Raspberry Pi 4 |
@ -2562,24 +2566,23 @@ PCBs and perfboard with optional components. The shape can be a rectangle with o
 |   8 | `screw(M2_cap_screw, 16)` |  Screw M2 cap x 16mm |
 |  12 | `screw(M2_cap_screw, 20)` |  Screw M2 cap x 20mm |
 |   2 | `screw(M2p5_cap_screw, 16)` |  Screw M2.5 cap x 16mm |
-|   4 | `screw(M2p5_cap_screw, 20)` |  Screw M2.5 cap x 20mm |
 |   8 | `screw(M2p5_cap_screw, 25)` |  Screw M2.5 cap x 25mm |
-|   4 | `screw(M2p5_cap_screw, 30)` |  Screw M2.5 cap x 30mm |
+|   8 | `screw(M2p5_cap_screw, 30)` |  Screw M2.5 cap x 30mm |
 |   4 | `screw(M2p5_pan_screw, 20)` |  Screw M2.5 pan x 20mm |
 |   8 | `screw(M2p5_pan_screw, 25)` |  Screw M2.5 pan x 25mm |
-|   8 | `screw(M3_cap_screw, 16)` |  Screw M3 cap x 16mm |
-|   4 | `screw(M3_cap_screw, 25)` |  Screw M3 cap x 25mm |
+|  10 | `screw(M3_cap_screw, 16)` |  Screw M3 cap x 16mm |
 |  14 | `screw(M3_cap_screw, 30)` |  Screw M3 cap x 30mm |
+|   4 | `screw(M3_cap_screw, 35)` |  Screw M3 cap x 35mm |
 |   8 | `screw(M4_cap_screw, 35)` |  Screw M4 cap x 35mm |
 |   1 | `pcb(XIAO)` |  Seeeduino XIAO |
 |   1 | `pcb(TP4056)` |  TP4056 Li-lon Battery charger module |
-|   3 | `terminal_35(2)` |  Terminal block 2 way 3.5mm |
-|   2 | `green_terminal(gt_2p54, 4)` |  Terminal block 4 way 0.1" |
+|   3 | `terminal_35(2)` |  Terminal block 2 way 3.5mm - not shown |
+|   2 | `green_terminal(gt_2p54, 4)` |  Terminal block 4 way 0.1" - not shown |
 |   1 |  |  USB A to Mini B lead - not shown |
 |   1 | `pcb(WD2002SJ)` |  WD2002SJ Buck Boost DC-DC converter |
 |  20 | `washer(M2_washer)` |  Washer  M2 x 5mm x 0.3mm |
 |  30 | `washer(M2p5_washer)` |  Washer  M2.5 x 5.9mm x 0.5mm |
-|  26 | `washer(M3_washer)` |  Washer  M3 x 7mm x 0.5mm |
+|  28 | `washer(M3_washer)` |  Washer  M3 x 7mm x 0.5mm |
 |   8 | `washer(M4_washer)` |  Washer  M4 x 9mm x 0.8mm |
 |   1 | `pcb(ZC_A0591)` |  ZC-A0591 ULN2003 driver PCB |

@ -2590,22 +2593,22 @@ PCBs and perfboard with optional components. The shape can be a rectangle with o
 |   4 | pcb_spacer2070.stl |
 |   4 | pcb_spacer2080.stl |
 |   4 | pcb_spacer2090.stl |
-|   4 | pcb_spacer25110.stl |
 |   4 | pcb_spacer25120.stl |
-|   4 | pcb_spacer25130_2.stl |
+|   4 | pcb_spacer25130.stl |
 |   4 | pcb_spacer25140_2.stl |
-|   4 | pcb_spacer25160.stl |
+|   4 | pcb_spacer25150_2.stl |
 |   4 | pcb_spacer25170.stl |
+|   4 | pcb_spacer25180.stl |
 |   2 | pcb_spacer2550.stl |
-|   4 | pcb_spacer2590.stl |
-|   4 | pcb_spacer30150.stl |
-|   5 | pcb_spacer30180.stl |
+|   4 | pcb_spacer2580.stl |
+|   4 | pcb_spacer30160.stl |
 |   5 | pcb_spacer30190.stl |
-|   4 | pcb_spacer30200.stl |
+|   5 | pcb_spacer30200.stl |
+|   4 | pcb_spacer30210.stl |
 |   4 | pcb_spacer3050.stl |
-|   4 | pcb_spacer3060.stl |
-|   4 | pcb_spacer40210.stl |
+|   6 | pcb_spacer3060.stl |
 |   4 | pcb_spacer40220.stl |
+|   4 | pcb_spacer40230.stl |


 <a href="#top">Top</a>
@ -2766,6 +2769,50 @@ Pin headers and sockets, etc.
 |   1 | `pin_socket(2p54header, 8, 1)` |  Pin socket 8 x 1 |


+<a href="#top">Top</a>
+
+---
+<a name="Potentiometers"></a>
+## Potentiometers
+Potentiometers and rotary encoders
+
+[vitamins/potentiometers.scad](vitamins/potentiometers.scad) Object definitions.
+
+[vitamins/potentiometer.scad](vitamins/potentiometer.scad) Implementation.
+
+[tests/potentiometers.scad](tests/potentiometers.scad) Code for this example.
+
+### Properties
+| Function | Description |
+|:--- |:--- |
+| `pot_body(type)` | Body diameter or width & depth, height and corner radius |
+| `pot_boss_d(type)` | Boss diameter |
+| `pot_boss_h(type)` | Boss height |
+| `pot_face(type)` | Faceplate rib width, plate depth and plate height |
+| `pot_gangs(type)` | Number of gangs for mult-gang pot |
+| `pot_neck(type)` | Diameter and length of the shaft neck |
+| `pot_shaft(type)` | Diameter, flat diameter, length and flat/slot length and colour. If flat diameter is less than the radius then it is a slot width |
+| `pot_spigot(type)` | Spigot width, length and height above the boss |
+| `pot_spigot_x(type)` | Spigot offset from the shaft centre |
+| `pot_thread_d(type)` | Nomininal thread diameter |
+| `pot_thread_h(type)` | Height of threaded part |
+| `pot_thread_p(type)` | Thread pritch |
+| `pot_wafer(type)` | Width, diameter and thickness of the track wafer plus true if curved |
+
+### Functions
+| Function | Description |
+|:--- |:--- |
+| `pot_size(type)` | Get pot body dimensions |
+| `pot_z(type)` | Ideal distance behind panel surface to get the nut on comfortably |
+
+### Modules
+| Module | Description |
+|:--- |:--- |
+| `potentiometer(type, thickness = 3, shaft_length = undef)` | Draw a potentiometer with nut spaced by specified thickness |
+
+![potentiometers](tests/png/potentiometers.png)
+
+
 <a href="#top">Top</a>

 ---
--- a/tests/PCB.scad
+++ b/tests/PCB.scad
@ -141,7 +141,7 @@ test_pcb = ["test_pcb", "Test PCB",
        [ 52, 194,   0, "2p54socket", 8, 1, false, 0, false, "red" ],
        [ 50, 220,   0, "standoff",  5, 4.5, 12.5, 2.54],
        [ 50, 240,   0, "potentiometer"],
-        [ 75, 240,   0, "potentiometer", 7, 8],
+        [ 75, 240,   0, "potentiometer", KY_040_encoder, 8],
        [ 30,  85,   -90, "7seg", WT5011BSR, 2],
    ],
    // accessories
--- a/tests/PCBs.scad
+++ b/tests/PCBs.scad
@ -21,7 +21,7 @@ include <../vitamins/pcbs.scad>

 use <../utils/layout.scad>

-function spacing(p) = let(w = pcb_width(p)) w < 22 ? w + 3 : w + 10;
+function spacing(p) = let(w = pcb_width(p)) w < 22 ? w + 3 : w + 7;

 module pcbs() {
    layout([for(p = pcbs) spacing(p)], 0)
@ -29,9 +29,9 @@ module pcbs() {
            rotate(90)
                pcb_assembly(pcbs[$i], 5 + $i, 3);

-    translate([0, 45])
+    translate([0, 65])
        layout([for(p = tiny_pcbs) pcb_length(p)], 3)
-            translate([0, pcb_width(tiny_pcbs[$i]) / 2])
+            translate([0, -pcb_width(tiny_pcbs[$i]) / 2])
                 pcb_assembly(tiny_pcbs[$i], 5 + $i, 3);

    translate([0, 120])
--- a/tests/png/pcb.png
+++ b/tests/png/pcb.png
--- a/tests/png/pcbs.png
+++ b/tests/png/pcbs.png
--- a/tests/png/potentiometers.png
+++ b/tests/png/potentiometers.png
--- a/tests/potentiometers.scad
+++ b/tests/potentiometers.scad
@ -0,0 +1,31 @@
+//
+// NopSCADlib Copyright Chris Palmer 2021
+// nop.head@gmail.com
+// hydraraptor.blogspot.com
+//
+// This file is part of NopSCADlib.
+//
+// NopSCADlib is free software: you can redistribute it and/or modify it under the terms of the
+// GNU General Public License as published by the Free Software Foundation, either version 3 of
+// the License, or (at your option) any later version.
+//
+// NopSCADlib is distributed in the hope that it will be useful, but WITHOUT ANY WARRANTY;
+// without even the implied warranty of MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.
+// See the GNU General Public License for more details.
+//
+// You should have received a copy of the GNU General Public License along with NopSCADlib.
+// If not, see <https://www.gnu.org/licenses/>.
+//
+//! Potentiometers and rotary encoders
+include <../core.scad>
+include <../utils/layout.scad>
+include <../vitamins/potentiometers.scad>
+
+module potentiometers()
+    layout([for(p = potentiometers) pot_size(p).x])
+        hflip()
+            potentiometer(potentiometers[$i], shaft_length = 30);
+
+if($preview)
+    let($show_threads = true)
+        potentiometers();
--- a/vitamins/pcb.scad
+++ b/vitamins/pcb.scad
@ -38,6 +38,7 @@ use <led.scad>
 use <dip.scad>
 use <axial.scad>
 use <smd.scad>
+include <potentiometers.scad>

 function pcb_name(type)         = type[1];  //! Description
 function pcb_length(type)       = type[2];  //! Length
@ -59,7 +60,6 @@ function pcb_size(type) = [pcb_length(type), pcb_width(type), pcb_thickness(type
 function pcb_component(type, name, index = 0) = //! Return the component specified by name and index
    [for(component = pcb_components(type)) if(component[3] == name) component][index];

-
 function pcb_grid_pos(type, x, y, z = 0) = //! Returns a pcb grid position
    let(grid = pcb_grid(type))
        [-pcb_size(type).x / 2 + grid.x + x * (is_undef(grid[5]) ? 2.54 : grid[5]),
@ -366,31 +366,11 @@ module jack(cutout = false) { //! Draw 3.5mm jack
 module buzzer(height, diameter, colour) { //! Draw PCB buzzer with specified height, diameter and colour
    color (colour)
        tube(or = diameter / 2, ir = height > 5 ? 1 : 0.75, h = height, center = false);
+
    color("white")
        cylinder(d = 2, h = max(height - 3 , 0.5));
 }

-module potentiometer(h1, h2) {
-    color("silver") {
-        baseSize = [12, 11, 6];
-        translate_z(baseSize.z / 2)
-            cube(baseSize, center = true);
-        translate_z(baseSize.z) {
-            cylinder(d = 5, h = h1 - 0.5);
-            if (show_threads)
-                male_metric_thread(6, metric_coarse_pitch(5), length = h1 - 0.5, center = false);
-        }
-        translate_z(baseSize.z + h1 - 0.5)
-            cylinder(d = 3, h = 0.5);
-        translate_z(baseSize.z + h1)
-            linear_extrude(h2)
-                difference() {
-                    circle(d=5);
-                    square([0.75,5], center = true);
-                }
-    }
-}
-
 function hdmi_depth(type)     = type[2]; //! Front to back depth
 function hdmi_width1(type)    = type[3]; //! Inside width at the top
 function hdmi_width2(type)    = type[4]; //! Inside width at the bottom
@ -1074,7 +1054,7 @@ module pcb_component(comp, cutouts = false, angle = undef) { //! Draw pcb compon
            if(show(comp, "molex_hdr"))     molex_254(comp[4], param(5, 0), param(6, undef));
            if(show(comp, "jst_xh"))        jst_xh_header(jst_xh_header, comp[4], param(5, false), param(6, "white"), param(7, undef));
            if(show(comp, "jst_ph"))        jst_xh_header(jst_ph_header, comp[4], param(5, false), param(6, "white"), param(7, undef));
-            if(show(comp, "potentiometer")) potentiometer(param(4, 5), param(5, 9));
+            if(show(comp, "potentiometer")) let(pot = param(4, BTT_encoder)) translate_z(pot_size(pot).z) vflip() potentiometer(pot, shaft_length = param(5, undef));
            if(show(comp, "buzzer"))        buzzer(param(4, 9), param(5, 12), param(6, grey(20)));
            if(show(comp, "smd_res"))       smd_resistor(comp[4], comp[5]);
            if(show(comp, "smd_cap"))       smd_capacitor(comp[4], comp[5]);
--- a/vitamins/pcbs.scad
+++ b/vitamins/pcbs.scad
@ -820,11 +820,71 @@ LIPO_fuel_gauge = [
    [] // accessories
 ];

+ESP32_DOIT_V1 = let(l = 51.45, w = 28.33, pitch = inch(1), pins = 15, poffset = inch(0.05)) [
+    "ESP32_DOIT_V1", "ESP32 DOIT DEV KIT V1",
+    l, w, 1.6, // Size
+    2, // corner radius
+    3, // mounting hole diameter
+    0, // pad around mounting hole
+    grey(20), // color
+    false, // true if parts should be separate BOM items
+    [for(x = [-1, 1], y = [-1, 1]) [x * 46.7 / 2 + l / 2, y * 23.4 / 2 + w / 2, false]],
+    [ // components
+      [l / 2 + poffset, w / 2 - pitch / 2, 0, "-2p54joiner", pins, 1],
+      [l / 2 + poffset, w / 2 + pitch / 2, 0, "-2p54joiner", pins, 1],
+      [1.75, w / 2, 180, "usb_uA" ],
+      [35,  w / 2, 0, "block", 17.7, 16, 3, silver], // can
+      for(y=[-1,1]) [3.5,  y * 6.5, 0, "chip", 4,  3, 1.6, silver],   // Mock button surround
+      for(y=[-1,1]) [3.5,  y * 6.5, 0, "chip", 1.8,0, 2.0, grey(20)], // Mock buttons
+      for(y=[-1,1]) [21.6, y * 9,   0, "smd_led", LED0603, y < 0 ? "red" : "blue"],
+      [14.8 - 2.5, 8, 0, "chip", 5, 5, 0.8],
+      [l / 2 + poffset + inch(0.7), w / 2 + pitch / 2 - 2, 90, "smd_cap", CAP1206, 1.75],
+   ],
+    [], // accessories
+    [(l - inch(pins - 1) / 10) / 2 + inch(0.05), (w - pitch) / 2, pins, 2, silver, 2.54, pitch], // 15x2 grid of holes
+];
+
+ArduinoNano = let(l = 43.18, w = 17.78, pitch = inch(0.6), pins = 15, poffset = -0.05, led_spacing = [1.5, 1.8]) [
+    "ArduinoNano", "Arduino Nano",
+    l, w, 1.6, // Size
+    0, // corner radius
+    1.85, // mounting hole diameter
+    0, // pad around mounting hole
+    "#2140BE", // color
+    false, // true if parts should be separate BOM items
+    [for(x = [-1, 1], y = [-1, 1]) [x * 40.64 / 2 + l / 2, y * 15.24 / 2 + w / 2]],
+    [ // components
+      [l / 2 + poffset, w / 2 - pitch / 2,  0, "-2p54joiner", pins, 1],
+      [l / 2 + poffset, w / 2 + pitch / 2,  0, "-2p54joiner", pins, 1],
+      [l / 2 + poffset + inch(0.75), w / 2, 0, "2p54header",  2,    3],
+      [1.75, w / 2, 180, "usb_uA" ],
+      [l / 2 - inch(0.25), w / 2, 45, "chip", 7, 7, 1.3],
+      [l / 2 + poffset + inch(0.15), w / 2,    0, "chip", 3.5, 6,   1.8, silver ], // mock button
+      [l / 2 + poffset + inch(0.15), w / 2,    0, "chip", 1.3, 2.6, 2.6, grey(90) ], // mock button
+      for(y = [-1.5 : 1.5]) [l / 2 + poffset + inch(0.4) - led_spacing.x, w / 2 + y * led_spacing.y, 0, "smd_res", RES0603, "1K"],
+      for(y = [-1.5 : 1.5]) [l / 2 + poffset + inch(0.4) + led_spacing.x, w / 2 + y * led_spacing.y, 0, "smd_led", LED0603, ["green", "red", "orange", "orange"][y + 1.5]],
+    ],
+    [], // accessories
+    [(l - inch(pins - 1) / 10) / 2 + poffset, (w - pitch) / 2, pins, 2, silver, 2.54, pitch], // 15x2 grid of holes
+];
+
+KY_040 = ["KY_040", "KY_-040 rotart encoder breakout",
+    26.3, 19.5, 1.6, 0, 3, 0, grey(20),  false,
+    [
+     [3.23 + 1.5, 1.3 + 1.5],
+     [3.23 + 1.5 + 16.775, 1.3 + 1.5]
+    ],
+    [
+       [-3, 12, 90, "2p54header", 5, 1, undef, undef, true],
+       [10.8, 11.3, 0, "potentiometer", KY_040_encoder],
+    ],
+    []];
+
 tiny_pcbs = [XIAO, MP1584EN, TP4056, ESP_01, LIPO_fuel_gauge];

-pcbs = [RAMPSEndstop, MT3608, PI_IO, ExtruderPCB, ZC_A0591, RPI_Pico, RPI0, EnviroPlus, ArduinoUno3, ArduinoLeonardo, WD2002SJ, RPI3, RPI4, BTT_SKR_MINI_E3_V2_0, BTT_SKR_E3_TURBO, BTT_SKR_V1_4_TURBO, DuetE, Duex5];
+pcbs = [RAMPSEndstop, KY_040, MT3608, ZC_A0591, ArduinoNano, RPI_Pico, ESP32_DOIT_V1, RPI0, EnviroPlus, ArduinoUno3, ArduinoLeonardo, WD2002SJ, RPI3, RPI4, BTT_SKR_MINI_E3_V2_0, BTT_SKR_E3_TURBO, BTT_SKR_V1_4_TURBO, DuetE, Duex5];

-pcbs_not_shown = [Melzi, Duex2, PSU12V1A, Keyes5p1];
+pcbs_not_shown = [Melzi, Duex2, PSU12V1A, Keyes5p1, PI_IO, ExtruderPCB];

 perfboards = [PERF74x51, PERF70x51, PERF70x50, PERF60x40, PERF70x30, PERF80x20];

--- a/vitamins/potentiometer.scad
+++ b/vitamins/potentiometer.scad
@ -0,0 +1,207 @@
+//
+// NopSCADlib Copyright Chris Palmer 2021
+// nop.head@gmail.com
+// hydraraptor.blogspot.com
+//
+// This file is part of NopSCADlib.
+//
+// NopSCADlib is free software: you can redistribute it and/or modify it under the terms of the
+// GNU General Public License as published by the Free Software Foundation, either version 3 of
+// the License, or (at your option) any later version.
+//
+// NopSCADlib is distributed in the hope that it will be useful, but WITHOUT ANY WARRANTY;
+// without even the implied warranty of MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.
+// See the GNU General Public License for more details.
+//
+// You should have received a copy of the GNU General Public License along with NopSCADlib.
+// If not, see <https://www.gnu.org/licenses/>.
+//
+//! Potentiometers and rotary encoders
+include <../utils/core/core.scad>
+use <../utils/rounded_cylinder.scad>
+use <../utils/round.scad>
+use <../utils/thread.scad>
+
+pot_nut_t = 2;
+pot_proud = 0.3;
+spigot_r = 0.5;
+tab = [3.2, 0.5];
+
+function pot_body(type)     = type[0];  //! Body diameter or width & depth, height and corner radius
+function pot_face(type)     = type[1];  //! Faceplate rib width, plate depth and plate height
+function pot_wafer(type)    = type[2];  //! Width, diameter and thickness of the track wafer plus true if curved
+function pot_gangs(type)    = type[3];  //! Number of gangs for mult-gang pot
+function pot_thread_d(type) = type[4];  //! Nomininal thread diameter
+function pot_thread_p(type) = type[5];  //! Thread pritch
+function pot_thread_h(type) = type[6];  //! Height of threaded part
+function pot_boss_d(type)   = type[7];  //! Boss diameter
+function pot_boss_h(type)   = type[8];  //! Boss height
+function pot_spigot(type)   = type[9];  //! Spigot width, length and height above the boss
+function pot_spigot_x(type) = type[10]; //! Spigot offset from the shaft centre
+function pot_shaft(type)    = type[11]; //! Diameter, flat diameter, length and flat/slot length and colour. If flat diameter is less than the radius then it is a slot width
+function pot_neck(type)     = type[12]; //! Diameter and length of the shaft neck
+
+function pot_size(type) = let(d = pot_body(type)) len(d) > 3 ? [d.x , d.y, d.z] : [d.x, d.x, d.y]; //! Get pot body dimensions
+
+function pot_z(type) = pot_thread_h(type) - pot_nut_t - pot_proud; //! Ideal distance behind panel surface to get the nut on comfortably
+function pot_spigot_r(type) = let(sp = pot_spigot(type)) sp.x > 2 * spigot_r ? spigot_r : 0;
+
+module potentiometer(type, thickness = 3, shaft_length = undef) {//! Draw a potentiometer with nut spaced by specified thickness
+    bh = pot_boss_h(type);
+    s = pot_size(type);
+    face =  pot_face(type);
+    wafer =  pot_wafer(type);
+    wafer_z = wafer? wafer.z : 0;
+    round = len(pot_body(type)) < 4;
+    dia_cast_colour = grey(60);
+    thread_d = pot_thread_d(type);
+    thread_h = pot_thread_h(type);
+    shaft = pot_shaft(type);
+
+    color(dia_cast_colour) {
+        // Boss
+        if(bh)
+            cylinder(d = pot_boss_d(type), h = bh);
+
+        if(face) {
+            if(face.x) {
+                linear_extrude(face.z)
+                    square([face.x, face.y], center = true);
+
+                linear_extrude(bh)
+                    difference() {
+                        square([face.x, face.y], center = true);
+
+                        square([face.x - 2 * face.z, s.x], center = true);
+                    }
+            }
+            translate_z(bh - face.z)
+                linear_extrude(face.z)
+                    intersection() {
+                        circle(d = s.x - eps);
+
+                        difference() {
+                            square([s.x + eps, face.y], center = true);
+
+                            if(face.x)
+                                square([face.x - 2 * face.z, s.x], center = true);
+                        }
+                    }
+        }
+
+        // spigot
+        x = pot_spigot_x(type);
+        sp = pot_spigot(type);
+        if(x)
+            translate([x, 0, bh])
+                vflip()
+                    rounded_rectangle(sp + [0, 0, bh], pot_spigot_r(type));
+        // thread
+        vflip()
+            if(show_threads)
+                male_metric_thread(thread_d, pot_thread_p(type), thread_h, center = false, bot = 0, colour = dia_cast_colour);
+            else
+                cylinder(d = thread_d, h = pot_thread_h(type));
+    }
+
+    d = pot_body(type);
+    fz = face ? face.z : 0;
+    gap = face ? face.z + tab[1] : 0;
+    total_h = s.z - bh;
+    gangs = pot_gangs(type);
+    gang_h = (total_h - (gangs - 1) * gap) / gangs;
+    pitch = gang_h + gap;
+    for(i = [0 : gangs - 1])
+        translate_z(bh + i * pitch) {
+            // Wafer that carries the track and contacts
+            if(wafer)
+                color("sienna") {
+                    linear_extrude(wafer.z) round(wafer[3] ? 1 : 0) {
+                        if(round)
+                            circle(d = s.x - eps);
+                        else
+                            rounded_square([s.x, s.y], d[3]);
+
+                        intersection() {
+                            translate([0, -s.y / 2])
+                                square([wafer.x, (wafer.y - s.y) * 2], center = true);
+
+                            if(wafer[3])
+                                circle(wafer.y - s.y / 2);
+                            else
+                                square(100, center = true);
+                        }
+                    }
+                }
+
+            color(silver) {
+                // Body
+                translate_z(wafer_z)
+                    if(round)
+                        rounded_cylinder(r = s.x / 2, r2 = d[2], h = gang_h - wafer_z);
+                    else
+                        rounded_rectangle([s.x, s.y, gang_h - wafer_z], d[3]);
+
+                // Make tabs that hold the face on
+                if(face) {
+                    translate_z(-tab[1] - fz)
+                        linear_extrude(face.z + tab[1] + wafer_z)
+                            intersection() {
+                                circle(d = s.x);
+
+                                for(x = [-1, 1], y = [-1, 1], a = y * 90 + 90 + x * 30)
+                                    rotate(a)
+                                        translate([s.x / 2, 0])
+                                            slot(r = tab.x / 2, l = (s.x - pot_boss_d(type)) / 2 - tab.x / 2, h = 0);
+                            }
+                }
+            }
+
+            // Face plate between sections
+            if(face && i) {
+                color(dia_cast_colour)
+                    translate_z(-fz)
+                        linear_extrude(fz)
+                            intersection() {
+                                circle(d = s.x - eps);
+
+                            square([s.x + eps, face.y], center = true);
+                         }
+
+                color(shaft[4])
+                    vflip()
+                    cylinder(d = shaft.x, h = gap);
+            }
+        }
+
+    // Shaft
+    color(shaft[4])
+        translate_z(-thread_h) vflip() {
+                shaft_z = is_undef(shaft_length) ? shaft.z : min(shaft_length, shaft.z);
+                flat_h = shaft[3] - (shaft.z - shaft_z);
+                plain = shaft_z - flat_h;
+                neck = pot_neck(type);
+                neck_h = neck[1];
+
+                if(neck_h)
+                    cylinder(d = neck.x, h = neck_h);
+
+                if(plain - neck_h > 0)
+                    translate_z(neck_h)
+                        cylinder(d = shaft.x, h = plain - neck_h);
+
+                if(flat_h)
+                    translate_z(plain)
+                        linear_extrude(flat_h)
+                            difference() {
+                                circle(d = shaft.x);
+
+                                if(shaft.y > shaft.x / 2)
+                                    translate([0, shaft.x / 2])
+                                        square([shaft.x, 2 * (shaft.x - shaft.y)], center = true);
+                                else
+                                    if(shaft.y)
+                                        square([shaft.y, shaft.x + 1], center = true);
+                            }
+            }
+}
--- a/vitamins/potentiometers.scad
+++ b/vitamins/potentiometers.scad
@ -0,0 +1,29 @@
+//
+// NopSCADlib Copyright Chris Palmer 2021
+// nop.head@gmail.com
+// hydraraptor.blogspot.com
+//
+// This file is part of NopSCADlib.
+//
+// NopSCADlib is free software: you can redistribute it and/or modify it under the terms of the
+// GNU General Public License as published by the Free Software Foundation, either version 3 of
+// the License, or (at your option) any later version.
+//
+// NopSCADlib is distributed in the hope that it will be useful, but WITHOUT ANY WARRANTY;
+// without even the implied warranty of MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.
+// See the GNU General Public License for more details.
+//
+// You should have received a copy of the GNU General Public License along with NopSCADlib.
+// If not, see <https://www.gnu.org/licenses/>.
+//
+//! Potentiometers and rotary encoders
+//                body     h     r     face               wafer                 gangs thread d   pitch       h     boss  h    spigot w, l, h  offset  shaft d flat h flat h   colour     neck
+imperial_pot_x2 = [[24,     22.5, 1.5], [5.7, 15.33, 0.8], [20, 28, 1.6, true],  2,   inch(3/8), inch(1/32), 6.35, 13.6, 2.4, [1.12, 3.03, 2],    11, [6.27, 5.5, 44.3, 44.3, silver],   [0, 0]];
+imperial_pot    = [[24,     12,   1.5], [5.7, 15.33, 0.8], [20, 28, 1.6, true],  1,   inch(3/8), inch(1/32), 6.35, 13.6, 2.4, [1.12, 3.03, 2],    11, [6.27, 5.5, 44.3, 44.3, grey(95)], [0, 0]];
+metric_pot      = [[23,     11,   1.0], [0, 15.33, 0.8],   [18, 27, 1.2, false], 1,   10,        0.75,       7.32, 13.9, 2.5, [1.12, 2.88, 1.26], 11, [6.27, 5.5, 43.8, 43.5, grey(50)], [0, 0]];
+KY_040_encoder  = [[12, 12, 6.5,  1.0], false,             false,                1,    7,        0.75,       7,    0,    0,   [0.4,  2,     0.8],5.8, [6,    4.5, 13,   10,   grey(60)], [4, 0.5]];
+BTT_encoder     = [[12, 11, 6,    0.5], false,             false,                1,    6,        0.8,        4.5,  0,    0,   false,               0, [5,    0.75, 9.5, 9,    silver],   [3, 0.5]];
+
+potentiometers = [BTT_encoder, KY_040_encoder, metric_pot, imperial_pot, imperial_pot_x2];
+
+use <potentiometer.scad>