Using a BA1404 integrated circuit this small FM stereo transmitter was found in a Radio Electronics magazine from October 1989. The coils are indicated.
This charger for currents up to 100 mA was found in a 1980 publication. The transistor could be...
In the figure we have a high stability voltage reference, providing a voltage of 10 V at the...
This circuit is from old documentation, but can be adapted to use modern components. Power...