This flasher for incandescent lamps was found in Radio Electronics magazine from July 1968. The frequency and duration of the pulses are adjusted in R1 and R3 depending also on C1.
This circuit was found in an American documentation from the 90s. It can be implemented with...
This 2-terminal regulator was obtained from a 1990s National Semiconductor manual. The components admit...
This circuit uses a photocell as sensor and a sensitive relay according the power supply voltage....