We find this circuit in American documentation from the 1980s. It consists of a frequency folder using a varicap. The capacitors and coils depend on the frequency of operation.
This circuit that mimics the sound of the famous Scottish instrument was found in a Popular...
The circuit shown is from the 1960 Mullard transistor reference manual. The circuit has a common...
The circuit we show is a water pump actuator that, in addition to being automatic, has a water...