This circuit was found in a 1970s General Electric documentation. This circuit already used an emitting LED. The circuit operates at frequencies from 50 Hz to 50 kHz with short pulses
This circuit was found in Electronics Today International of the 80's. The circuit uses still...
Found in an Electronic Design, this circuit is intended to produce signals in the VHF band. The...
This circuit uses a not easy to find IC these days. The circuit sources 15 W to a 4 ohm load and...