MPU6050 Tilt Indicator

An MPU6050, an Arduino, and three LEDs — feel the difference between accelerometer and gyro readings.

Difficulty: Breadboard. Estimated build time: about 60 minutes. Estimated parts cost: about US$7.00. 6-part bill of materials with live supplier pricing. A pocket-sized motion sensor that lights one of three LEDs depending on which axis the breadboard is being tilted along.