Passage Alarm with High Power Output (CB25485E)

This circuit was found in the July 1992 Radio Electronics magazine. The output circuit must be equipped with a heat sink.

| Clique na imagem para ampliar |

Comparator With Op. Amp. (MSB069E)
This simulation shows how to use an operational amplifier as a voltage comparator. The sample uses the...
Telephone Conversations Automatic Recording (CB17296E)
This circuit automatically activates the relay when the phone is answered, closing the record...
Vehicle Alarm (CB4867E)
This car alarm was found in an American '80s documentation. The circuit automatically activates...