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.
September 2016 - It can be purchased from Mouser Electronics the new antenna tuning circuit from...
This circuit uses a selector switch to select resistors for timings given in seconds. Capacitor C1 can be...
This circuit trips when the input voltage exceeds 13.8 V, which is an important value in the case...