This is a follow on to my previous project to switch on the hero 4 remotely
The same circuit is used, one unused pin was available which is now used to read infra red signals from a IR receiver attached to the same PCB.
Using IR has several advantages over other methods.
- IR receivers are small and use very little power compared to wireless
- Interfacing to a microprocessor is very simple
- The sending transmitter placement is not so critical
- The sending transmitter can interface to many transmission systems (RS232, RS485, RF.)
- No RF issues such as range, channel selection, interference.
Several changes to the Auto-On circuit have been made:
- The microprocessor now uses the Low voltage version, the PIC12LF1822
- The board now uses the GoPro 3V regulated supply rather then the unregulated 3.4-3.7V supply
- The IR Receiver now uses the Interrupt input RA2 previously used for Shutter.
- The PCB is slightly trimmed to fit the IR Receiver and two pad layouts changed.
- The Green LED now uses a surface mount type side mounted.
A short video of the operation of the GoPro under IR control is here
The 10-pin USB connector with resistor is available from http://www.chargeconverter.com/ for $4.99 plus postage.
I use PIC WIZ-C development software from Forest Electronics at http://fored.co.uk which includes the IR RC5 library and many more.