This circuit was found in a Radio Electronics magazine from June 1962. The circuit is for cars of the time with platinum ignition. The indication is made on an analog instrument.
This circuit is from 2005 documentation. It automatically starts an irrigation pump when the...
This resistance meter circuit was found in the February 1984 issue of Radio Electronics magazine. It is...
In addition to keeping a battery constantly charged, this circuit only lights lamps when it is...