This circuit controls 6 LEDs in two sets with the phase change cycles controlled by a 555 oscillator. The circuit can be powered by voltages between 6 and 12 V.
Found in Popular Electronics from the 1980s, this circuit uses two operational amplifiers from...
The operational amplifier used is the 741, but the configuration is valid for other operational...
This digital electronic game circuit was found in a 1982 publication. It randomly draws the...