After lots of troubleshooting my wireless tally project/product is nearly finished.
The prototypes have been tested in the field and proven to work as expected.
Next up are the finishing touches: etching the boards with the final adjustments, populating them, programming the microcontrollers and fitting everything in the enclosures.
Some pictures of the prototype boards:
An early version of the transmitter board. As a size reference: the top left pads are for a micro usb connector.
This is the connector through which the tally on/off signal had to go. Unfortunately I couldn’t get hold of the proprietary connector (for a reasonable price) so I had to make my own connector, at least for the tests.
Halfway casting a test connector.
In the end I ended up making a breakout cable for the studio connector.
Dieter Vansteenwegen (ON4DD) 