Found in a 1965’s General Electric documentation, this circuit can be designed with modern equivalent transistors depending on the current of the controlled motor.
This circuit came out at a Wireless World in January 2000. The circuit can be easily assembled as it uses...
We found this transmitter circuit for different frequency ranges in a 1992 documentation. The...
This TTL circuit can be used as a shield, controlled by one of the inverters. The circuit must be...