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 data to tell you how fast you’re traveling. It works with iPads that have GPS ...

Surely the GPS technology should be more accurate than the speedometer? – RP You’re right that GPS is usually more accurate ...

Google maps shows the speed limit of the road you are on and your current speed. I’ve noticed that this is 4mph less than that displayed on my speedometer. It’s the same in my wife’s car and a friend ...