Using a BA1404 integrated circuit this small FM stereo transmitter was found in a Radio Electronics magazine from October 1989. The coils are indicated.
We found this circuit in a 1966 US documentation. It simulates a variable capacitor that can vary...
In the figure we have the way to make the three-phase control of a motor using opto-diacs. The circuit is...
This low Power output stage can source a fraction of watt to a small loudspeaker. The transformer...