This small 1 W amplifier uses a Motorola integrated circuit from the 1970s. The integrated circuit used is uncommon today and the power supply does not have to be symmetrical.
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...