Using an integrated circuit that was available at the time, this circuit produces animal sounds such as mooing, rooster crowing, etc. The circuit is from a March 1997 Electronics Now magazine.
The basis of this project is a three-position lever switch or similar. When the switch is in the...
This physical line servo control uses components that are not currently common. The circuit is from...
This circuit was found in a Popular Electronics from the 90's. The power transistors must be...