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.
This circuit, obtained in an old publication, causes a second telephone bell to be played in a...
This circuit is from the 1982 SGS Linear Circuits Manual. The circuit provides currents from 35 mA...
This circuit generates pulses of up to 60 seconds with a short reset time. The circuit is from an...