I'm creating a control unit for a Sbus compatible gimbal based of these instructions (How to build - Kino Wheels). I have it working but I want to isolate the control signal so I can power the gimbal and the arduino seperatley. I'm using a MOCD207M optocoupler
as I think it should switch fast enough for the SBUS signal (baud rate of 100000). I created a simple test circuit which seemed to work fine (see below) but when I cnnect my data signal instead of the 5v/ground connection I doesnlt work. I've never used optocouplers before so any advice would be greatly appreciated.
The LED resistor is 188Ohm and I've tried various values for the phototransitor side resistor, none of which seem to work (188, 282, 10k).
The connection labeled Tap is where my signal comes out to the gimbal