Found in a 90s American documentation, this circuit is used in vehicles with contact breaker. The circuit does not provide much additional information.
This circuit uses a crystal phone and can be built with more modern transistors like the BC548. The...
June 2017 - New high power TVS for high-power retention applications with bi-directional features...
This small inverter that produces high voltage from a 6 V source was found in an American...