This circuit was obtained in an American documentation from the 90's. The circuit can be implemented with some equivalent components, such as transistors and TTL logic circuits.
This VCO makes use of an RC4558 which is an operational amplifier with characteristics close to...
This circuit can operate with different voltages, depending on the zener used. We found it in a...
This circuit can be used in the car to control the windscreen wipper or with other appliances at...