Found in an 80's Hands On Electronics, this circuit turns on a light when it gets dark and goes out when it gets dark. The circuit can be adapted to use high-brightness white LEDs.
This circuit was found in an English magazine from 1981. We can still assemble it using BC548...
This circuit is from a 1978 optoelectronics manual from Texas Instruments. The transistor can be a...
LEDs are diodes and can be tested with a simple configuration that allows the display of its...