contactless tachometer

Abstract

Tachometer is a device that gives the information about the rotational speed of any machine .The rotating machine could be any prime mover like an electric motor, diesel engine, petrol or gas driven engine, gas turbine, water turbine, steam turbine, or numerous industrial equipment which are driven by any of the above engines . As the name indicates, we can accurately measure the speed of the rotating shaft without touching the shaft. This device is built on a 16F873A microcontroller, an alpha-numeric LCD module and a proximity sensor to detect the rotation of the shaft whose speed is being measured.