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A cheap speedometer for vehicles made using Arduino Uno and reed switch

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Speedometer

A cheap speedometer for vehicles made using Arduino Uno and reed switch

Components 🧮

Component Amount Utility
Arduino Uno x1 Microcontroller
Reed Switch x1 Indicator for one complete turn of the vehicle wheel
16x2 LCD Display x1 To display the speed data
Potentiometer x1 To adjust the contrast of the LCD display if the potentiometer is not built into the LCD module

Schematic 🏗️

Screenshot 2022-01-20 211128

Working of Reed Switch 🧲

This wikipedia article gives an in-depth working of the reed switch.

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A cheap speedometer for vehicles made using Arduino Uno and reed switch

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