DIY Speedometer on Arduino




About: I like to create things, handmade weapon, arduino projects, science and some crazy staff! Also I like to capturing videos about my projects and I have YouTube channel - MadGyver!

This project based on Arduino, it will measure time of one revolution of wheel, then divide wheel's lenght on this time, and it will be the speed. Revolutions of wheel will be measured by magnet and hall sensor. I used servo motor with arrow and scale to show the speed, it looks like "analog". Also I used 7 segment display to show distance (odometer), also arduino write odo in its EEPROM after bicycle is stopped, so odo keeps in Arduino and not clears after system reboot.

You can watch all process of making this device IN THIS VIDEO

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Step 1: Components and Wiring

All we need:

Connect components by scheme.

Sketch for Arduino and library are here, on my GitHub page

Step 2: Body

Body is made of shoe sponge box. Servo and display are fixed by hot glue. Button fixed by superglue.

Step 3: Scale

Draw scale on thick paper and cut it off. Arrow is made of painted toothpick and fixed to servo by thermalshrink tube

Step 4: Mount

Speedeter will be mounted on bike's handbar by tube mount. Sensor wire I wond around brake tube. Plastic cap is body for hall sensor. Magnet I fixed on cable holder.

Step 5: Test Drive

Speedometer works correctly, and also it is strong enough to survive a very aggressive forest ride. That’s all I wanted to show you, so see ya later! You can watch test drive video by this link

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    9 Discussions


    2 years ago

    Why did you link to the non-English Ali site for the components?


    2 years ago

    That's really cool and comes up at a good time because the Speedo on my bike just broke, getting new ones is a pain and I could probably modify it to work like this if I wanted and still make it look stock standard. Apart from the digital ODO of course.

    1 reply

    2 years ago

    Dude .. that is all class.


    2 years ago

    haha great! :)