Using a 106 series SCR, this circuit was found in the May 1971 Radio Electronics magazine. The quiescent current is very low and is given by the value of R1.
This oscillator was found in the September 1984 issue of Radio Electronics magazine. The frequency is...
This simple 555 biofeedback circuit was found in the December 1983 issue of Radio Electronics...
Found in documentation from the 1980s, this circuit generates signals that can reach a few...