This circuit was found in 1960s Radio Electronics. The circuit uses components from that time. The triac is according to the controlled load. The sensor is a common LDR.
This circuit is from an old American publication. It divides a 40 to 60 MHz TTL signal by integer...
The SN72741 integrated circuit is nothing more than the version of Texas Instruments of the known...
Found elsewhere in this section, but from other sources, this circuit is from a 1964 Electronic...