Found in a 1967 American electronics magazine, this circuit has an input impedance of 2000 ohms. The circuit can be built with modern equivalent transistors.
This experimental drone circuit was published in a Radio Electronics magazine article from...
This circuit causes an LED to blink from the 1.5 V supply thanks to the use of a voltage doubler. The...
This circuit consists of a traditional version of dimmer with triac and was found in a 2000...