The smallest motion device was designed to help people monitor any movement, which can be attached to the body, machine, sports equipment and many more. It equipped with microcontroller (Atmega328), bluetooth HC-05, accelerometer MPU, small battery, and charging port.
It had two sides of surface mount circuit, with low power management circuit. Suitable for wearable device prototyping, and for portable monitoring device. This is first version and need more improvement later.