Led Tachometer Circuit Diagram. A simple 10 led tachometer circuit can be seen in the above diagram. A rotating object may be a bike tire a car tire or a ceiling fan or any other motor and so on a digital tachometer circuit comprises lcd or led readout and a memory for storage.
Digital tachometers are more common these days and they provide numerical readings instead of dials and needles. Rechargeable led lantern circuit using dynamo. The circuit basically consists of two mains stages.
The circuit basically consists of two mains stages.
For using this circuit as an automobile tachometer the input terminal a should be connected to the spark plug cable and terminal b should be connected to the vehicles ground. For calibrating the circuit set r2 at 25k and r4 at 5k power up the circuit and feed the input terminal with a 60hz square wave form your function generator. A rotating object may be a bike tire a car tire or a ceiling fan or any other motor and so on a digital tachometer circuit comprises lcd or led readout and a memory for storage. This is the circuit i used in my project.
