We found this circuit in an Australian documentation from 1991. The circuit is suitable for SMD mounting thus making it very small. The circuit was sold in a kit at the time.
This speed or priority switch set uses two LED indicators and two SCRs in a common configuration. The...
Found in a 90s American documentation, this circuit is used in vehicles with contact breaker. The...
This circuit for activating a relay was found in a Radio Electronics magazine from August 1962. The...