This 1-transistor circuit for currents up to 50 mA was found in the August 1974 Radio Electronics magazine. The transformer is 50 to 200 mA.
This car turn signal circuit was found in the April 1969 issue of Radio Electronics magazine. The...
We found this small amplifier in a 1973 technical publication. The critical components are the...
We found this circuit in a Radio Electronics from October 1960. The circuit uses just one...