So for this third hack we started with an online-bought robot costume, but being a creative tech people, we couldn't resist making it better by using some brilliant LED strips that react to sound.
The dense LEDs (144 per meter) were used on the helmet. More spaced apart (30 per meter) were used on the arms. All of them drive from one Teensy receiving analog signal from the microphone located in the helmet. The microphone captures both the voice of the wearer and ambient sounds.
Here's what it looks like reacting to the music:
Technical Build:
The idea was to attach two denser LED strips to the face mask guard and the rest to the arms of the costume. They both would react to ambient sound and light up depending on the frequency of sound. The helmet's strip would have the lower frequencies in the middle and the arms would have them start at the wrists.
The face mask guard took 52 LEDs per strip and arms got 25 LEDs per arm. These calculations are reflected in the code below.
For the arms, I divided each LED strip into two sections (since the costume itself had separate foam pieces for forearm and shoulder), and gave them their own battery. That allowed me to have a simple 2 pin connection for joining the arms to the helmet.
One problem when dealing with RGB Strips on wearables is that the solder pads are small and the wires break off too easily. I tried to minimize this by adhering a small wooden backing to the end of each strip. This acts like a cast and, when sealed with heat shrink, immobilizes the connections. I cut the supports on the laser cutter, but you can use anything. Popsicle sticks would work as well.
Here is the basic wiring diagram I used:
Wiring for Robot Costume
Software:
This code uses hardware support for FFT that's built into the Teensy. If you want to use a different processor, you will need to add a FFT library and modify the code accordingly.
I found some code online that was almost perfect for this project. Rather than reinventing the wheel, I reused that code, and modified it for my needs. Original credit has been left in the code.
NYC: Yup, we're tired of the drizzly weather here in Western Canada and are packing up and heading East to the land of Cheesecake and subways. We're registered for the Open Source Hardware Summit and we're helping out at the Maker Shed at the Maker Faire. That, and we're going to do some sight-seeing. New […]
Wowwee sent us some information telling us a bit more about the upcoming Bio Bugs that Mr. Tilden is working on. It includes an image showing some of the finished prototypes, and more "Official" stats on these upcoming toys! Check it out! Read More...
Solarbotics has worked on a good many interesting costuming projects, but few have been as unique as Shannon Chappell's Rock Golem. Shannon did a fabulous job repurposing electronics for the Golem, and if you're trying to do the same, be ready for some major dumpster-diving. Alternately, since we first worked on the Golem, we've been […]
Finally, the freezing temperatures are somewhat over, and the outside seems almost livable, as opposed to run-for-your-life-or-else-you-freeze-able. Our links also, no matter the season, stay well-selected and non life-threatening. Photosynthesis-based Table Table that harvests energy of the sun by Dutch designer Marjan Van Aubel, via Designboom. Visualizing Sorting Algorithms Sorting algorithms are always interesting to […]
Solarbotics has been operating for more than 25 years, bringing electronics know-how and supplies to both the electronics professional and hobbyist. We'll be happy to help you too!
Solarbotics, Ltd. is not responsible for misprints or errors on product prices or information. For more information, please see our Terms and Conditions.
Warning: This product contains chemicals known to the State of California to cause cancer and birth defects or other reproductive harm. Please visit www.P65Warnings.ca.gov for more information. This item was manufactured prior to August 31, 2018.