This circuit was found in a 1966 General Electric book. The triac and the day are from that time and can be replaced by modern equivalents depending on the load.
This configuration with common CMOS gates was found in an American publication from the 90s. The...
This TTL circuit can be used as a shield, controlled by one of the inverters. The circuit must be...
This circuit is interleaved with the source of a portable AM or FM radio previously tuned to a...