Despite being found in a 1980 publication, this circuit uses components that can still be found easily. The circuit feeds an array of LEDs that run randomly, stopping at one.
This circuit was found in a 1967 EEE. The components are from that time, but the circuit can be...
This is another one of the crystal oscillator configurations with the 4001. Many of them are on...
Using a 106 series SCR, this circuit was found in the May 1971 Radio Electronics magazine. The...