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 generates signals of different waveforms thanks to the use of a relaxation...
This converter converts signals from the 50 MHz band to the AM band, making it possible to receive...
This circuit appears in various parts of this site and this section, with diverse origins. This is from...