This dimmer for incandescent lamps using triac and an LF7237 IC was found in May 1985 Radio Electronics magazine. The circuit supports extension buttons.
This circuit was obtained from a Philips documentation from 1970. It can be built on modern...
The modified Hartley oscillator seen in the figure can generate signals ranging from 3 MHz to 10...
This circuit was found in an American publication from the 1970s. The circuit uses components from...