This circuit is from the time when cars used contact breakers. This 80's version measures the dwell angle of the contact breaker for dwell adjustment using an era integrated circuit, the LM3917.
This crowbar protection circuit for non-regulators blows the fuse when the load voltage exceeds a...
This circuit locks when the sensors are opened. The relay can be 6 or 12 V depending on the power...
This circuit was found in a 1990 Electronics World magazine. The circuit can be mounted today by...