Code 199 ARDUINO BASED TACHOMETER

The main objective of this project is to avoid physical contact between the motor shaft and tachometer by using a non-contact tachometer in order to make it convinient, while measuring the speed of aBLDC motor.Also using standard contact type tachometer may not feasible in some applications.

The proposed system uses a arduino and a rectified-power supply. An IR transmitter and a photodiode is connected to the controller for measuring the speed of the BLDC motor. A LCD display is interfaced to the arduino controller for displaying the speed information.

This project uses IR light reflection principles. A white patch is mounted on the shaft of the motor. A pair of sensors (Transmitter and receiver) are used to develop a pulse for each reflection that sends an interrupt to the arduino controller. The timer of the controller calculates each pulse received in a particular time intervaland displays the same as RPM (speed) on theLCD display.

The concept of the contact-less tachometer can be enhanced and implemented in the bikes, cars for speed measurement.And thus, the usage of the traditional analog speedometer could be avoided in future.

Note

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