In the figure we have a simple way to produce tone in a piezoelectric transducer. The frequency depends on the capacitors and the supply can be done with voltages from 1.5 to 6 V.
The purpose of this regulator is to regulate the RMS voltage in an alternating current load. The...
This circuit can use almost any operational amplifier and the FET can be the BF245. The circuit...
Found in a Motorola documentation from 1965, this circuit consists of an electronic ignition with a...