Month: January 2011

Measuring a weather balloon’s volume

The guys at Louisville, KY’s hackerspace LVL1 are trying to send a helium balloon across the Atlantic to Europe — autonomously. But to determine the helium’s lifting power, they first have to figure out how much helium their balloon holds. It’s a fascinating conundrum and the perfect sort of thing for a hackerspace’s hive mind […]

Arduino MIDI accordion

Incredible, a MIDI accordion for under $100! Ukraine’s Dmitry Yegorenkov wanted a way to practice accordion while wearing headphones, and didn’t want to shell out over six grand for the Roland model with MIDI out, so he made his own, source code and schematics included. Accordion Mega [via Arduino Blog]