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Step 4The underside of the board
The picture shows the underside of the board. The optical sensor has been protected with a bit of tape.
I have labelled the two signal lines. The gnd area is the largest copper area on the board. The Vdd can be recognized by there being an electrolytic capacitor directly across it and gnd.
I have labelled the two signal lines. The gnd area is the largest copper area on the board. The Vdd can be recognized by there being an electrolytic capacitor directly across it and gnd.
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