Continuing from part 1, I have replaced the IR detector in the matrix receiver and now the receiver can detect the 56KHz Austar remote. Unfortunately the transmitter is still sending out a 38KHz signal and the Austar box doesn’t respond to it.
At this point I can see two options:
- Build a circuit to convert the 38KHz carrier into a 56KHz carrier
- Replace the IR detector in the Austar box
Option 1 isn’t too hard, but it does need a bit of wiring and extra components.
Option 2 would give me the cleanest solution, but involves hacking a box that technically isn’t mine.
I am still considering my options…