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.
The purpose of this circuit, which we find in an old American documentation, is to allow the...
This simple TTL electronic dice uses common anode displays. The circuit is from a March 1975 Radio...
This is the basic version of a gain 20 amplifier with the LM386 providing a few hundred...