Found in a 1947 publication, this circuit uses 4 parallel/push-pull tuber in the output stage. The circuit employs dual power supply with two rectifier tubes.
This circuit is from an old 1967 publication. The circuit uses a programmable unijunction...
This simple rhythmic light circuit uses a 110 V to 220 V transformer and can hold a good number of...
The basis of this circuit is a National Semiconductor operational amplifier that functions as a...