| Electronics > Projects, Designs, and Technical Stuff |
| Christmas light circuit reverse engineer |
| (1/1) |
| pyrohamish:
I'm trying to reverse engineer a set of battery / solar Christmas lights so I can program and run the lights with a ATTINY or similar. Photo of board and the schematic I've worked out attached. I think I know mostly how it works, but, what is the purpose of the voltage divider to NPN transistor? |
| exrbc:
switch on when solar voltage drops, turns on when dark. |
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