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 was obtained in a 1999 English magazine. We can easily assemble it because all the...
I found this circuit in a Popular Electronics from November 1999. The magazine is no longer...
This polarity inverter circuit for voltages down to about -12 V was found in the December 1992...