This circuit is suitable for use in radio receivers to improve the quality of weak signal stations. The circuit was suggested by the May 1994 issue of Electronics Now magazine.
This circuit causes an LED to flash if the monitored voltage exceeds the value set in the pot. The...
Found in an Electronics World of 1966 this circuit can be made with current power transistors. It causes...
Found in a 1970 documentation, this SCR bistable can be implemented with modern equivalent SCRs. Observe...