This is a DIY Ghost Box like the Ovilus ghost hunting device. While I don't believe in ghosts, I do think ghost hunting gear is fascinating. This box chooses words out of a 1000 word dictionary based on magnetic field and temperature changes. The code is available for free on GitHub: https://github.com/kevinl95/ghostbox

Electronics: 1x Adafruit Feather M4 Express (If substituting, make sure you either buy a board with a DAC for the speaker or build one) 1x Adafruit 9-DOF Accel/Mag/Gyro+Temp Breakout Board - LSM9DS0 1x Adafruit Illuminated Toggle Switch with Cover - Green 1x Adafruit Thin Plastic Speaker w/Wires - 8 ohm 0.25W 1x Adafruit Lithium Ion Battery - 3.7v 2000mAh