This automotive circuit was found in the September 1992 issue of Radio Electronics magazine. The circuit directly drives a relay that must have a coil resistance greater than 65 ohms.
This circuit was found in a 1970's Radio Electronics. The pulse transformer has a 1: 1 turn ratio....
We found this circuit in a documentation from the 70s. The circuit uses amplifiers from the time,...
This circuit is an alternative to the previous circuit. We found it in the same article in the...