diff --git a/Custom-Bluetooth-Scale.md b/Custom-Bluetooth-Scale.md
index 606828f..fcd4416 100644
--- a/Custom-Bluetooth-Scale.md
+++ b/Custom-Bluetooth-Scale.md
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Figure A: Final result of the hacked bathroom scale (front)
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Figure B: Final result of the hacked bathroom scale (back)
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So in the end I could power supply the Arduino for around 3 years with the 4 AAA batteries (960mAh). To power down all external modules, like the Bluetooth, EEPROM, RTC module, while the Arduino is in sleeping mode I used an external [BC546 NPN Transistor](https://github.com/oliexdev/openScale/raw/master/doc/bc546_transistor/bc546_datasheetpdf) as a switch. I connected the transistor as in figure 6.1 or figure 2.4.
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Figure 6.1: Schematic of the BC546 NPN Transistor
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Figure 5.1: Schematic of the 24LC512 I²C EEPROM
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Figure 5.2: I²C EEPROM module (front)
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Figure 5.3: I²C EEPROM module (back)
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Figure 4.1: I²C RTC module (front)
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Figure 4.2: I²C RTC module (back)
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Figure 3.1: HC-05 Bluetooth module (front)
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Figure 3.2: HC-05 Bluetooth module (back)
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Figure 2.1: Arduino Pro Mini board
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Figure 2.2: CP2102 USB to Serial converter (front)
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Figure 2.3: CP2102 USB to Serial converter (back)
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@@ -555,8 +555,8 @@ Note that I used 3.3V (see pin 3V3 on figure 2.3) from the CP2102 converter boar
I connected the scale's display connector to the Arduino Pro Mini as the following schematic:
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Figure 2.4: Schematic overview of the openScale project
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First of all I had to find a suitable bathroom scale that I wanted to reverse engineer. I was searching for a cheap bathroom scale that can analyse not only my weight but also my body fat, water and muscle. The scale design should be clear and the display of the scale should have some kind of a simple seven segment display (I hoped that a simple display would be easier to reverse engineer). The [Sanitas SBF12 scale](http://www.sanitas-online.de/web/en/products/weight/SBF12.php) that I found in a department store seemed to be right for my purpose. So I bought one for only 20€ (around 25$), see figure 1.1.
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Figure 1.1: Sanitas SBF 12 scale
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Figure 1.2: Scale overview
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Figure 1.3: Back side of the circuit board
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Figure 1.4: Front side of the circuit board
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Figure 1.5: Connected wires unordered
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Figure 1.6: Connected wires ordered
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Figure 1.7: Back side of the scale wired
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Figure 1.8: Front side of the scale wired
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Figure 1.9: Attached notes to the wires
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Figure 1.10: Pin layout of the display connector
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Next step is to analyse the signals that are controlling the display. I had the opportunity to use a 16 digital channels oscilloscope ([Agilent Technologies MSO7014B](http://www.keysight.com/en/pd-1788165-pn-MSO7014B/mixed-signal-oscilloscope-100-mhz-4-analog-plus-16-digital-channels)) for this step, see figure 1.11. Alternative you can use a microcontroller like [Arduino](http://www.arduino.cc/) to read the signals.
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Figure 1.11: The 16 digital channels oscilloscope for analysing the signals
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Figure 1.12: signals of value "P-01"
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Figure 1.13: signals of value "P-02"
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Figure 1.14: signals of value "P-03"
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Figure 1.15: signals of value "P-04"
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Figure 1.16: signals of value "P-05"
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Figure 1.17: signals of value "P-06"
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Figure 1.18: signals of value "P-07"
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Figure 1.19: signals of value "P-08"
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Figure 1.20: signals of value "P-09"
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Figure 1.21: signals of value "0.0 kg"
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Figure 1.22: signals while displaying the person symbol, see signal on D8 and D9
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Figure 1.23: signals while displaying the person and age symbol, see signal D8 and D9
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Figure 1.24: seven segment display
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