This simple Morse Code oscillator was found in a 1980s American documentation. The power supply should be powered with 5V and the integrated can be the 7400.
The existence of field effect transistors at the input of the integrated circuit (operational...
This converter for the 150 MHz band was found in an American documentation. Transistors are...
This circuit is indicated for small low power amplifiers allowing the use of a tweeter. The...