Found in a Popular Electronics from the 80's, this circuit simulates the equivalent card game. The circuit is CMOS and can be supplied with voltages from 6 to 12 V.
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...