This 50% active cycle TTL clock generates signals from 4 to 20 Hz. Its power must be supplied with 5 V and other frequencies can be generated with capacitor replacement.
This circuit uses a common multimeter on the voltage scale. The calibration of the scale should be...
This circuit was found in Electronics Handbook, Vol XIII 1993 and consists of a simple direction...
This car alarm was found in an American '80s documentation. The circuit automatically activates...