Found in a November 1977 Radio Electronics magazine, this digital circuit was described in an article that taught how to assemble it. The 6-digit circuit is a clock.
The frequency depends on the coil and is not found in the original documentation but should be...
This is a device for those who need to show that they know how to use digital electronics but have...
Using an operational amplifier with FET, this circuit from a 1977 publication can generate...