This circuit from Delta Products was published in the May 1974 Radio Electronics magazine. The circuit consists of a capacitive discharge ignition for 12 V vehicles.
This circuit is from the 1982 SGS linear integrated circuit manual. The LS141 is like to the 741...
The integrated PLL XFl2211 (Exxar) is used to decode data transmitted by tones R1, C1, C2 and C3...
This bistable touch sensor circuit uses a relay and is very sensitive. We found it in a 1990...