This circuit can keep a set of lamps on for up to 1 minute, time given by C2 and R2 that can be changed. The load depends on the relay. The circuit is old, from 1988 documentation, but totally viable today.
This amplifier provides a power near to 1W. The supply must be made with a voltage of 9 V coming...
Found in a Popular Electronics from the 90s, this circuit reaches 100 kHz and battery power is...
Motors up to 2 A DC can be controlled by this circuit that we find in the manual for linear...