This simple timer for incandescent lamps or other non-electronic charges uses a triac as a control element. The triac must be mounted on a heatsink and the time obtained depends on capacitor C2.
This 1995 circuit uses an audio amplifier that is no longer common today. However, other...
This is a channel of a stereo amplifier and small power with the LM386 suggested by the Radio...
This 10-minute timer was found in the July 1994 Radio Electronics magazine. The relay must be...