This circuit is used in frequency meters to isolate the input output. The circuit is from old documentation. Equivalent operational amplifiers can be used.
This circuit was found in a 1973’s Japanese magazine. It uses transistors of the time and is...
This cassette player motor speed control was found in the January 1991 issue of Radio Electronics...
This circuit was obtained in a 1982 English magazine. The purpose of this circuit is to make an...