Found in a European magazine from the 90s, this circuit emits beeps that are several seconds apart to indicate that a device is on. The transducer is a ceramic or crystal capsule.
We found this circuit in an old documentation. Its purpose is to turn on warning lights when the...
This percussion circuit was found in an Electronics World of 1968. The transistor may be general...
We found this transmitter circuit with a single chip in the Motorola Linear Databook of 1990. The...