I'm trying to add a photocell light sensor to a device that sits under a liquor bottle that lights it up Only when it's dark.
However the photocell (or at least I'm pretty sure it's a photocell) only completes the circuit when there is light shining on it, rather than when there is not.
I removed the photocell from a broken night light that's been gathering dust in my junk cabinet. The night light logically lit up at night, but the sensor seems to be doing the opposite. Does anyone know what component I would require to reverse the effect of the cell?
The first picture below is the circuit wired simply on a mini breadboard with a LED to test for continuity. The photocell is the only other component on the board, and is causing the LED to shine dimly.
The second picture has a light shining on the photocell. It is hard to see, but the LED is lit much more brightly. I want to reverse this effect. All suggestions are welcome!