This Power supply sources from 500 to 1,000 mA according the transformar and was found in a publication of the year 1958. The diodes can be now the 1N4004 and the transistor should be mounted on a heatsink.
This circuit can generate signals from 1 Hz to more than 100 kHz with a range determined by the...
The frequency in this circuit is adjusted by P1 and given by C1. Short pulses, as the ones...
The tone produced by this circuit attract fishes. The circuit is installed into a small can and...