RP You’re right that GPS is usually more accurate than a speedometer. By law, manufacturers have to make sure that cars’ speedometers don’t underread, and as a result, most of them set ...

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, ...

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.