This circuit was found in the March 1992 issue of Radio Electronics magazine. The circuit has several adjustments and uses an operational amplifier. Note the supply voltage.
November 2016 - Mouser Electronics is selling the entry circuit for Analog Devices AD8232 and...
We found this circuit in an old neon lamp application manual. The circuit stores a call. The...
This project was originally made to feed small microcomputers of the time (1986). However, the basic...