Hello, I'm trying to figure out what would be better for a digital voltage control.
Photoresistors are resistors so that's an obvious choice but optocoupled LDRs are expensive and/or difficult to find.
Phototransistors adjust current which in turn adjusts voltage but they don't work with negative voltage right?
Photodiodes I haven't figured out yet.
Photoresistors are resistors so that's an obvious choice but optocoupled LDRs are expensive and/or difficult to find.
Phototransistors adjust current which in turn adjusts voltage but they don't work with negative voltage right?
Photodiodes I haven't figured out yet.