Changes:
- Uses PoE going into the Trinket’s BAT line. This can regulate from between 5.5v and 16v, so I have the option of PoE up to 16v. Other chips on the board are powered from the Trinket’s 5V regulated output.
- Now using one 75176 for Tx and Rx rather than two. This allows me to use the other pair of lines for a photo transistor in the light sensor box.
- D3 is the transmit/receive output pin.
- A4 is the photo resistor input pin. (The photo resistor on the breadboard will not be put on the PCB but will be via the RJ45 jack.)
