Installing IR detector and emitter

• Emitter is usually clear

• Detector is not clear

Wiring to PCB

• J5 is primary optical connection for separating block A from block B

• Pin 1 is the square pad

• TX (emitter is pin 1 and 2). IR LED is forward biased with anode to pin 1

  • Flat side of LED is the cathode

• RX (detector is pin 3 and 4). Detector is reverse biased. Just flip it around and see what works, it will not blow up.

Open

Open

Version 1 build

Open

Known issues

1. Need caps on current sense transistors else the port expander can’t see them properly trip

   1. v2 design comprehends all issues

2. CAT5 connectors are mis-labelled for A and B connections

3.