I’m using a Keyence LR-W70 Full-Spectrum sensor as an input to an Automation pHat. I’ve currently got it connected to an ADC input because the “off” state of the sensor is over 3v and thus never goes “low” on a binary input. (I wrote a function that evaluates the incoming voltage and returns 0 or 1 to emulate a binary input)
I’d like to put it on a standard binary input and in the past I’ve used a pull-down resistor in this situation but I’m unsure what value to use. The impedance of the circuit isn’t published anywhere I could find.
Or is this the right way to go about it? (The reason I’d like to get it on a binary input is because I want to use the RPi.GPIO library to set up event detection on that sensor and I can’t do that with the ADC inputs)