Currently, Google Maps navigation system can display the speed at which the car is moving. However, many people wonder why the speed shown on the map differs from the speed displayed on the car's ...

Learn how to install a digital speedometer in older cars for enhanced accuracy and style. Follow our step-by-step guide.

You can listen in on a two meter repeater and you can build a GPS module speedometer. That’s what [Jeremy Cook] did with just a few parts, a little 3D design, and some handy zip ties to hold it ...

Built for simplicity, elegance, and extreme practicality, Speed is a GPS speedometer that uses the iPad’s location ... Speed won’t replace all the functions of your car’s dashboard, but it also offers ...

Instead, this build is an analog display for GPS-acquired speed data ... The display itself is a gutted marine speedometer fitted with the movement from a motorcycle tachometer.