Another of the many tachometer circuits we have on our site. This one is from the September 1976 Radio Elecronics magazine. The circuit is connected to the platinum contacts of a car or to a sensor.
This circuit generates a tone of a bell and can be used in this type of application. The circuit is...
This circuit uses a common-cathode 7-segment display powered from a decoder and a 0-9 counter. The...
With this simple converter found in a 1997 documentation, it is possible to tune VHF stations to a...