We found this circuit in the June 1987 issue of Radio Electronics magazine. With it, it is possible to receive signals from the bands determined by the crystals in a common medium wave receiver.
Found in a 1966 Electronics World, this circuit applies to the protection of any analog...
We found this circuit in an English documentation from the 80's. The circuit can make use of...
The power of this converter is not the greatest, it can only supply small fluorescent lamps,...