Found in a 90s Radio Electronics, this circuit can supply currents of a few amps, according to the power transistor. The power transistor must be equipped with a heat sink.
Found in a 90s ARRL Handbook, this circuit is intended for the production of signals in the side...
This thermostat was found in a 1997 publication. It can be powered by 6 V with the use of a...
This simple alarm with latching uses a relay as the main element. The circuit is from a Radio...