Arduino Bike Speedometer With 128 X 64 Graphics LCD

by Shahid Khattak

51K21684

Intro: Arduino Bike Speedometer With 128 X 64 Graphics LCD

I build this speedometer for my own motorcycle. I am using it on my own Honda CD70 motorcycle (70CC) and it is working pretty well. The concept of this speedometer is very simple. A reed switch is used to measure the RPM of the wheel, and some mathematics is used to determine the circumference of the wheel. And that is then used to find the distance traveled in unit time, which is called speed.

In this project only three digital I/O pins of Arduino are used by the Display. And all other pins are available for future addition of functions, like engine temperature, fuel gauge etc.

STEP 1: What You Will Need!

Parts List:

(1x) 128 x 64 Graphics LCD with blue or yellow background (your choice). Amazon.com

(1x) 40 x 60 mm prototype board Amazon.com

(1x) 220 Ohm 1/4 Watt Resistor Amazon.com

(2x) 10K Ohm 1/4 Watt Resistor Amaz on.com

(1x) 20 Pin single row Male Headers Amazon.com

(1x) 20 Pin single row Female Headers Amazon.com

(1x) 1N4001 Diod (this quantity can increase up to 5 depending on your required functionality). Amazon.com

(1x) Magnetic Reed Switch Amazon.com

(1x) Hall effect Sensor Module (3pins) if you ant to use it instead of reed switch.

If you want to use an Arduino UNO, then the following Items will not be needed.

(1x) Atmega 328p Microcontroller (Arduino UNO Boot loaded).

(1x) 28 pin DIP IC socket Adopter

(1x) 16 MHz Quartz Oscillator

(2x) 22pF Low Voltage DIP Ceramic Disc Capacitors, 50V

(1X) 7805 Voltage Regulator IC.

(2x) 10uF 25V Electrolytic Capacitors.

Additional Material.

Zip Ties.

Double Sided tape.

Electric Tape

Solder Wire

Soldering Station, or Soldering Iron or Soldering Gun.

An Arduino UNO will be required only for the first time when you burn the code into the Atmega 328p microcontroller.

I am using it with my Motor Cycle, which has its own 12V Battery, so I am using the same battery as supply voltage, If you want to use it with your bike which do not have its own power source, then you should use a 9V Alkaline battery.

STEP 2: Circuit Diagram Without Using Arduino UNO

I am using Fritzing to show the diagram, because it is a good software to use for schematic and breadboard view. I have not used the whole Arduino UNO, instead I have used only the Atmega Microcontroller to make things simpler. But if you want to use the Arduino UNO board you can do it. I am sharing both the diagrams. The choice is yours.

I am using a motorcycle, which has the only indication when the gear is neutral. The indication i through a wire which is gounded when the gear is neutral. I used a diod to prevent the positive polirity at this pin, because it can kill the arduino / Atmega Microcontroller, because my motorcycle has 12V battery.

If your motor bike have indication for all the gears, you can use the same method, and use additional pins of arduino, and a little bit changes in the code. If you are unable to do this, please let me know, i will help you.

STEP 3: Circuit Diagram Using Arduino UNO

If you want to use the Arduino UNO board instead of microcontroller alone the follow the above diagrams.

STEP 4: Mount the Reed Switch and Magnet to Your Bike Wheel

If you are using the delicate glass reed switch, then you should place it in wooden case and secure it with hot glue, to prevent it from damage. Mount the reed switch to the wheel axle at appropriate place and attach the magnet to one of the spokes exactly in front of the reed switch.

I have used zip ties to secure the magnet to one of the spokes, and it is working well, i have tested it up to the speed of 86 KM/H, and it works fine.

STEP 5: The Code

Mount your Atmega 328p in the Arduino UNO board and copy paste this code into your Arduino IDE and upload it to your Microcontroller. If you have an error of the missing library, then download the U8glib from this link and add it to your Arduino IDE libraries folder. Click Here to Download Library.

I have added a splash screen in this version, you can amend it according to your needs.

If you want to use a hall effect sensor instead of reed switch, then change must be made to schematic as well as code. I will upload the same later.

The Final Code is attached here.

67 Comments

MarkoS67 6 years ago

Dear Shahid Khattak, is it possible to display to odometer? I bought all of the components and starting to work on the speedometer. But i am curious is it possible to make odometer so i know how many kilometer my motorcycle has traveled. Many thanks, Marko.

NusratM 3 years ago

Yes, it is possible i make it, if you want to make i will sand you the code on your email.

v8pixel 2 years ago

Amazing project! I also want the code for the odometer memory. Can you please help? My email: v8pixel@gmail.com
Many thanks!!!

Mcclopp 3 years ago

Hello Mr. Khattak my name is Marcio from Brazil, I would like to know if Is it possible to replace the space that shows "GEAR" with a programmable timer? and the space that shows "RPM" by an up / down counter .. the speedometer remains the same. I would like to use this project as a treadmill display .. would it be possible? thank you and congratulations.

Mcclopp 2 years ago

Thank you very much for your reply .. On the counter, in fact, I would like the "RPM" display shows the calorie spent on a walk on the treadmill, which is a formula that makes the following calculation: Km / h X 75X 0.0175 where the result is shown on the display in place of the "RPM". In place of "GEAR" I need a programmable timer to adjust the chosen time of the walk. The "SPEED" display remains the same, with only a change in the diameter of the wheel that changes to 20Cm. Please, can you help me with the programming. I don't have much experience. thank you so much.

Shahid Khattak 2 years ago

ok, Please give me a week or two and remind me after that, and I will try to help you with this

Mcclopp 2 years ago

Hello Mr. Khattak, as you asked me, I'm writing again to remind you about the possibility of rewriting the program with the features I requested ..can you help me?

Thank you

Mcclopp 2 years ago

Hello Mr. Khattak, as you asked me, I'm writing again to remind you about the possibility of rewriting the program with the features I requested ..can you help me?

Thank you

Mcclopp 2 years ago

Thank you so much!!!

Shahid Khattak 2 years ago

Sorry for late reply, What do you mean by Up/Down Counter? And yes you can add a programable timer

Fatih1453dmrc 2 years ago

Hello, I did the same with the scheme and uploaded the code, nothing appears on this screen, why is the cathode pin of the diode blank? Can you help me

Shahid Khattak 2 years ago

Hi Thanks for your effort, The cathode pin is used for the gear indication of the neutral gear, it will be connected to the cathode of the battery when the vehicle is on neutral. It will be a lot easier to troubleshoot for me if you use a breadboard. From the images you sent I cannot see the connections properly

Fatih1453dmrc 2 years ago

First of all, thank you for your answer. First of all I want to make sure that my 12864b3 v2.0 coded screen is working. I couldn't even test the screen through the library. Can you help me to test it?

Shahid Khattak 2 years ago

Hi Welcome, are there any lables with pins of your LCD like this?

Fatih1453dmrc 2 years ago

I connected the display pins without setting up the circuit, is that the problem?

jalsingh64678 3 years ago

Sir iwant speedometer bois devloper help me

NusratM 3 years ago

Dear Shshid Khtak, Assalam-o-alikum, I made this project with speed as well as distance showing on screen but the problem is that when magnet stop in front of reed switch the reading of distance is continue to increase. Is any idea to solve this problem.
Thanks in advance.

Nimabaradari 5 years ago

Hey bro
I want that for my cbr1000f
And i want to indicate gears on display
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