Motion Controlled Wearable LED Dance Harness

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Contributors: bboyho
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Understanding Your Circuit

Initial Circuit

For the scope of this tutorial, we will be focusing on the motion controller and using the LED strips and custom harness from the previous tutorial. Green and red were chosen to make yellow from the primary colors. A low-G, triple-axis, analog accelerometer (ADXL335) was added to sense the orientation of a dancer. A 3.3V Arduino was added to read the analog sensor data and control the LED strips based on the readings. Since the LED strips are powered at 9V and require more current than the Arduino's I/O pins can source, an n-channel MOSFET was chosen to safely control the LED strips. A 10kΩ pull-down resistor was added between the gate and ground so that the transistor is not floating.

Wearable Motion Controlled LED Harness Circuit

Having a hard time seeing the circuit? Click the image for a closer look.

A 9V battery and custom made motion controller were used for each harness. Keep in mind that a 9V battery is not able to power all three colors simultaneously. However, using two colors was sufficient enough for the project and performance.

Complete Circuit

After successful tests on a breadboard, the circuit was condensed and soldered to a mini-solderable breadboard. Components were added to both sides of the breadboard to take advantage of the space provided. The front view is shown below to illustrate the circuit. Keep in mind that the transparent components are mirrored images of the Arduino Pro Mini and barrel jack. The top view for each of these components would be facing outward on the other side. Additionally, the wires are soldered between the boards.

Wearable Motion Controlled LED Harness Circuit - Front View

Having a hard time seeing the circuit? Click the image for a closer look.

The back view is shown below to illustrate the circuit. Again, the transparent components are mirrored images of the accelerometer, resistor, and n-channel MOSFET. The top view for each of these components would be facing outward on the other side.

Wearable Motion Controlled LED Harness Circuit - Back View

Having a hard time seeing the circuit? Click the image for a closer look.