This circuit uses an amplifier from National Semiconductor, uncommon nowadays. The numbers in parentheses are for the second channel. The circuit is suitable for old tape recorders.
We found this circuit in a 1965 General Electric manual. The circuit applies to incandescent lamps only and...
This simple circuit was obtained in a Portuguese publication in 1979 but can be easily assembled with...
In fact, it is a night light system that automatically turns on the outside lights when it gets...