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 was obtained from an American 80's documentation. The balanced mixer can be shown in...
This circuit was found in a 90s Electronic Engineering. The quadruple operational amplifier can be...
I found this circuit in an English publication from 1989. This configuration can be mounted with...