Hi everyone !. I was trying to hack buttons of this rf remote for led strips
I opened the remote and found out the traces for the power button and soldered two wires to the pads on the remote’s pcb.
I want to trigger the power button using ths motion sensor module and an optoisolator . So i connected the pins of the remote button to the collector and emitter (minding the polarity ofc). And input to the opt-out of sensor using 120ohm resistor.
The problem is that the thing works perfectly for the first time after motion detection and then the the optoisolator stays high.
I tried using an Arduino (both mega and a nano), individualy the Arduino can control the remote using optoisolator just fine but when I try to get an input from the rcwl sensor to trigger the opto , the same problem appears again (the output to isolator get stuck on high after the initial motion detection event). I checked with the serial monitor for the sensor and is is working just fine.
I really want to know what is going wrong. Any help would be hugely appreciated.
Block diagram attached.
Add/edit- the optocoupler(pc 817) is a simple transistor type and not a triac type. But it is behaving like a triac (by staying high even when input led shuts off)