Brighten Your Backyard With Air Quality Indicating Balloons

Brighten Your Backyard With Air Quality Indicating Balloons

Red, yellow or green will indicate the levels of diesel or exhaust in the air, while creatively illuminating the scene at a night-time gathering. If your balloons are mostly red, I’d suggest relocating to a less polluted locale.

If you have some basic electronics/soldering skills and the ability to purchase a Figaro Air Quality Sensor, an 8-pin PICAXE microcontroller and DIP socket, a rechargeable lipo battery, a 10K or 100K resistor, and a tri-coloured LED, you can build one of these guys yourself. You can find the exact directions to recreate these balloons over at Instructables. [Instructables via BoingBoing]