This circuit was obtained from the Encyclopedia of Electronic Circuits volume 5 of 1995. The circuit uses the 4001 CMOS to obtain hysteresis in the sensor feedback.
We found this receiver in old documentation. The transistor is made of germanium and the...
This circuit was found in a Popular Electronics from the 90s. Transistors are general purpose...
The circuit presented was obtained from a 1976 Italian Radio Elettronica but can be easily...