We found this circuit in a 1998 publication. The circuit has controls for both frequency and signal strength. A lamp is used to monitor the signals. The supply is made with a voltage of 12 V.
Found in an Elektor from the 90's, this double door-bell drive circuit switches a relay by...
July 2017 - Mouser Electronics announced the availability of Littelfuse's GEN2 series Schottky...
This circuit is from a 1976 documentation. It uses an operation that is still common in our...