Process

1. Designing the circuits

At the first step, we created two circuit diagrams on Autodesk Tinkercad. The first circuit is responsible for inputting step data to the cloud, and the other circuit is responsible for outputting servo motion to a rotatable plate to indicate user's current stage.

In the input diagram, red wires go to 3.3V, green wires go to ground, and other colored wires go to pins. The idea is that the tilt sensor simulates the step counter installed in any smartphone or wearable device. When the user takes a walk, the tilt sensor will register the motion and send a number to the particle cloud. The green LED serves as a power indicator. The system can be controlled on and off by a button or on the particle cloud function.