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 digital circuit is from a Radio Electronics magazine from December 1991. It does not use a...
This circuit was obtained from an 1974 Everyday Electronics magazine. The circuit is still current as...
This analog tachometer was found in Radio Electronics from the 90s. The components used can still...