The Triac trigger integrated circuit is not very common nowadays. The circuit was found in the Radio Electronics Experimenter magazine from 1989. The triac should be in accordance with the heater.
This circuit, which can act as a shield, was found in a 1969 documentation. The circuit uses...
This oscillator can generate signals from 100 kHz to more than 50 MHz depending on the crystal used...
This simple multivibrator circuit generates a 1 kHz signal rich in harmonics. The circuit is from...