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 converts signals from 0 to 19 kHz into voltages from 0 to 1 V. The circuit is from a...
One of the problems with the 555 integrated circuit, normally used when timing is desired, is that...
We found this circuit in a Radio & Electronics Constructor from November 1975. The magazine no longer...