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 ...

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 ...