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.
In the figure we show another timer, this one is simpler because it uses only one of the four...
This instrumentation circuit is from the June 1986 issue of Radio Electronics magazine. Equivalent...
This two-transistor amplifier has good gain but delivers a fraction of a watt of power. The...