Wind Seeded Random Number Generator

thingiverse

True random number generation isn't easy, but nature has a way to help make it more unpredictable! This project harnesses the unpredictability of wind to boost randomness. How it works: Wind blows and turns the turbine, which spins magnets surrounding a Hall Effect sensor. The sensor's analog reading is then used to seed Arduino's random number generator. In this project, I showcase how it works by using an Arduino Leonardo with LCD shield to display both the sensor reading and the generated random numbers. Here's the intro video: http://youtu.be/Xa6oNLMHxV0 A video looking at the internals: https://youtu.be/pOM6396XCkw A video showing how to install the sensor is available here: https://www.youtube.com/watch?v=4NolKku4ONg Arduino testing video: https://youtu.be/YvRmffyRWiY Hardware: * Arduino + mounting hardware + LCD shield by DF Robot + 9V battery with connector. * Hall effect sensor + wire. * 4 magnets (1/4" diameter cylinder, 1/16" thick). * 2" T-pins (it's the axle). * BB gun ammo, stainless steel, 4.5 mm (balls for bearing). For enclosure: #6 machine screw. Easy to make; no soldering is required. No print support is needed. Any dimensional correct printer setting will do. The only overhangs are screw mounting holes, which you tap out. The rest of the overhangs are no larger than 45 degrees. Many parts are friction fitted.