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
The circuits shown below consist of diode protections against accidental polarity reversal in the supply...
This FM transmitter was described in the Radio Electronics magazine of June 1963. It operates in...
The current can be kept constant in the load circuit using the integrated regulator LM350. The...