Found in an ancient American documentation, this circuit can generate signals up to 40 MHz for a Z80, microcontroller widely used at the time. The circuit must be powered with 5 V and also serves as a shield.
This sequential light effect was obtained in a 1992 documentation, but it can be easily assembled...
This VCO makes use of components from the 1980s. The circuit can be implemented with modern...
We found this circuit in a Radio & Electronics Constructor of November 1975. The magazine no...