Found in an 1868 Mullard documentation this circuit has a dynamic range of 10 Hz to 25,000 Hz. Modern equivalent transistors can be used.
We find this circuit in an earlier American publication of 1978. The components are no longer...
This circuit was found in an old documentation and can be powered by a solar panel. The touch...
CHANDLER, Ariz., Aug. 11, 2016 — Microchip Technology Inc. (NASDAQ: MCHP), a leading provider of...