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Archive for the ‘speedometer’ Category

[Johan Beyers] built an elegantly simple Dog Speedometer project that uses a POV display to display a running dog’s speed without the benefit of an accelerometer. Using an Arduino (looks like it might be a D-love) and a line of 5 LEDs, [Johan] built a dirt-simple POV — 39 lines of code — that times out the flashes so that an immobile viewer sees the dog’s speed. How do you know your pup’s loping speed? That’s the beauty of this project.

Instead of putting all of the LEDs in a line, they are arranged in a V-shape. Because of this spatial offset, the patterns flashed out only “look right” at the right speed. Each number is flashed at a different speed, so you just look for the least distorted numeral.

[Johan]’s code does only what it needs to get the job done. The character data are stored in arrays that are played back directly to the pins of PORTD — avoiding most of the usual Arduino-style complexity with pin definitions and other foolery.

POV displays can be leveraged to add pizzazz to any project — this CD-ROM POV clock and this wind-powered POV weather station come to mind.


Filed under: Arduino Hacks

It is pretty easy to go to a big box store and get a digital speedometer for your bike. Not only is that no fun, but the little digital display isn’t going to win you any hacker cred. [AlexGyver] has the answer. Using an Arduino and a servo he built a classic needle speedometer for his bike. It also has a digital display and uses a hall effect sensor to pick up the wheel speed. You can see a video of the project below.

[Alex] talks about the geometry involved, in case your high school math is well into your rear view mirror. The circumference of the wheel is the distance you’ll travel in one revolution. If you know the distance and you know the time, you know the speed and the rest is just conversions to get a numerical speed into an angle on the servo motor. The code is out on GitHub.

Granted, reading a magnet, keeping time, and driving a servo isn’t exactly cutting edge. On the other hand, it made us think about what other kinds of outputs you could drive. We haven’t seen a nixie tube speedometer (well, not on a bicycle, anyway), for example. Or maybe one built with mechanical flip numbers like an old clock.

We have seen some with Arduinos and lots of LEDs (although, again, not really for a bicycle). This speedometer might still be our favorite, though.

 


Filed under: Arduino Hacks, transportation hacks
Lug
30

This Nixie Tube Speedometer Gives Retro-Futuristic Life to a 70s Motorcycle

1971, arduino, cafe racer, Electronics, motorcycles, nixie tubes, Retro, retro-futuristic, speedometer, vintage Commenti disabilitati su This Nixie Tube Speedometer Gives Retro-Futuristic Life to a 70s Motorcycle 

nix-bike1Nixie tubes are interesting pieces of equipment. They have a "retro-futuristic" look that has great appeal to electronics hackers.

Read more on MAKE

The post This Nixie Tube Speedometer Gives Retro-Futuristic Life to a 70s Motorcycle appeared first on Make: DIY Projects, How-Tos, Electronics, Crafts and Ideas for Makers.

Mag
05

DIY Speedometer and Odometer

arduino, odometer, speedometer Commenti disabilitati su DIY Speedometer and Odometer 

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by electroguyz:

Hey guys, this a instructable of how to make a bike speedometer.Yeah,you read it right the one that we use in car but only for 10$ .Well the first this for you to know is that this is the collaborated project of Mr_DIY_Electrician and paurushthemaker .So back to topic our project is all about a speedometer which has 3 modes as follow:-

DIY Speedometer and Odometer – [Link]

Apr
24

Arduino Bike Speedometer

arduino, speed, speedometer Commenti disabilitati su Arduino Bike Speedometer 

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by amandaghassaei instructables.com:

Monitor your road speed using the Arduino. This project uses a magnetic switch (also called a reed switch) to measure the speed of one of the bike’s wheels. The Arduino calculates the mph, and send this information out to the LCD screen on the handlebars as you ride. It is compatible with any kind of bike/wheel, simply enter the radius of the wheel in the firmware to calibrate the device for your setup.

Arduino Bike Speedometer – [Link]

Feb
10

GPS Powered LED Speedometer #ArduinoMicroMonday

adafruit, arduino, Arduino micro, diy, micro, speedometer Commenti disabilitati su GPS Powered LED Speedometer #ArduinoMicroMonday 

Adafruit + Arduino Micro and GPS powered LED Speedometer v1.0 by xykobas3rd on Instagram:

speedometer



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