It works with iPads that have GPS available, and it has been designed to take full advantage of the Retina display. With a combination of Google Maps and beautifully represented compass, speedometer, ...

Surely the GPS technology should be more accurate ... if it’s actually doing 70mph, a new car’s speedometer is allowed to read anywhere from 70mph to 83.25mph). Which is why many drivers ...

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 ...

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.

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

On the occasions I use my smartphone as a sat nav, I get a readout of the speed of the car on the screen ... Cars made before 1932 do not have to have a speedometer. Are there any special ...