02-02-2025, 10:35 AM
Hmm, odd, I would have expected that to work... if you're registered on somewhere like EEVBlog you could try asking on there. Actually before you do that can you check the voltage on DI (with the sensor connected) to make sure that it actually is being pulled down to GND? With the various pullups and things in both devices it could be that there's not enough voltage difference across the opto LEDs to light them. A high-impedance meter connected to the sensor output might give a different reading to the KC868 connected as an actual load.