Post revised and edited above by an unidentified outlaw. They are produced in South Africa. When America is Great Again they will be made in China or in the US by a Chinese company.:mad2:James Wiebe at Belite makes (retails) some (nice) lightweight electronic stuff.
VB's post discussed pressure sensors plugged into the USB port. The right sort of pressure sensor could be used as an altimeter. I'd be surprised if someone hasn't already come up with an App. I'm sure you can get some kind of magnetic sensor, too. And I know there are tiny sensors that can function as gyros. Cheap! Heck, you could probably put in an artificial horizon. Hmm... looks like someone's already done that and some phones apparently have the gyro already.Yes and no.. all GPS based and I really don't trust GPS for my altitude.
Your option to build and equip it as you like, but why add unnecessary weight, cost and complexity to an ultralight?i need some kinda tacometer, altimeter, compass and id like a turn indicator.