This SCR relaxation oscillator was found in an 80's Electronic Design. It flashes a small incandescent lamp in frequency that depends on the capacitor.
This circuit was found in a 1967 RCA SCR manual. It uses period components that can be replaced with...
This circuit for the power grid was found in the June 1969 Radio Electronics magazine. The load is...
This fuzz effect is from a 1988 Italian publication, but it can be easily assembled, as the...