This dimmer for incandescent lamps using triac and an LF7237 IC was found in May 1985 Radio Electronics magazine. The circuit supports extension buttons.
Found in a 90’s Popular Electronics, this circuit applies to almost any operational amplifier. With...
This circuit is suitable for calibrating old oscilloscopes. It was found in a 1980s documentation. It...
We found this circuit in the April 1979 Radio Electronics magazine. Note the filter capacitor bank...