I am wondering if it would be possible to re-purpose the QTR-1RC sensor to result in a ambient light level sensor. It would be nice to have one that we could use the same way we use the QTR-1RC sensor, i.e. charge and timed discharge.
I’m thinking of replacing the phototransistor (remove the whole led/phototransistor module) with a light dependant resistor (LDR), and getting rid of the 150ohm resistor.
The normal LDR varies between very high resistance (approx 10M) when dark and much lower when in the light (from 48k to 150k) depending on the light source.
I’m not it seems to me i would probably need a smaller cap as the even in full light (48K) it’s quite high still…
What would I need to change to get this to work (if possible) or is there a better solution for getting simple analog light levels?