I'm building a light-triggered sound puzzle for my kids, and I have seven pieces. A little bit like this toy:
My plan was to plug 7 photoresistors to ADC pins on my Raspberry Pi Pico, but actually, there are only 3 ADC pins, right?
Someone advised me to just plug them in regular digital pins, and then just make sure the signal is simply thresholded to yield a High/Low kind of switch.
I'm a total newbie and I'm not sure what components I need to couple to the photoresistor to convert the analog signal to high/low digital one.