This electronic Morse key was found in a Popular Electronics from the 90's. The components are common, but there is a mechanical part that requires assembly skills.
In this circuit found in a 1991 publication we can use the 2N2646 unijunction transistor and the...
Up to 0.5 A DC motors can be controlled by this circuit. Direction change is achieved by a logic...
This circuit was obtained in the publication 101 Electronics Projects of 1979. The circuit can be...