Found in a 1980s publication, this circuit can be modified to use modern components and operate at lower voltages. The power supply does not have to be symmetrical.
This special effect circuit with LEDs using the 4017 was obtained in a 1982 publication. LEDs are...
Found in a 1967 Electronics World, this circuit uses unusual components today. The transformer has a high...
In the figure we have the basic configuration of a rectangular oscillator using an operational amplifier...