Found in 1980s Electronic Engineering, this circuit uses common phototransistors as sensors. The circuit is CMOS using an integrated 4011.
This circuit was found in Sgnetics documentation from the 80's. The circuit also has loudness...
Originally this circuit is from an English magazine, but I found it in Argentina's Radio Chassis...
When the power is cut off, this circuit keeps the flashlight on for a while, allowing it to be...