This circuit was found in a Mallory documentation from 1968. The integrated circuit is of the time, unusual in our day. Input sensitivity is 20 mV for 2 W output.
We found this circuit in an old Argentine publication. The transistor can be replaced by a more...
This power supply uses a single-winding transformer. We found it in July 1984 Radio Electronics magazine....
This simple rhythmic light for incandescent lamps was found in old English documentation....