Known as “FLORA,” Adafruit’s wearable electronics platform is built around Atmel’s Atmega32u4 MCU. The microcontroller boasts built-in USB support, eliminating the need for pesky special cables and extra parts.
As Adafruit’s Limor Fried notes, FLORA is extremely “beginner-friendly.” Indeed, the device is difficult to accidentally destroy by connecting a battery backwards, thanks to a polarized connector and protection diodes. Meanwhile, an onboard regulator ensures even connecting a 9V battery won’t result in damage or ruined projects.
As we’ve previously discussed on Bits & Pieces, numerous Makers are using FLORA to design a wide range of creations.
Today, we’re going to be taking a closer look at a MIDI drum glove designed by Adafruit’s very own Becky Stern that is powered by the versatile Atmel-based platform. Aside from FLORA, key project components include:
- 4X small piezos
- USB mini cable
- 4X 1M ohm resistors
- Ribbon wires
- Scrap fabric
Stern kicks off the MIDI drum glove project by ironing out some fabric to match the glove, cutting four small pieces slightly larger than her fingertips and ironing a small hem on one side.
“Put your glove on and establish what spots make contact with the table, then mark those spots with a pencil. Thread your needle and double the thread over, then tie a knot at the end of the tails,” Stern explains in detailed project tutorial.
“Stitch through one of your pieces of fabric and affix it to the glove fingertip over the pencil mark with a whip stitch. Be careful not to stitch the glove finger closed! Check periodically to be sure your stitches only pierce the intended layer. Stitch halfway around the pocket, tucking the seam allowance in as you go.”
Next? Stick the piezo in the pocket, finish stitching it shut, leaving the wire sticking out towards the back of the hand. Tie off and cut the thread.
“Repeat for the other three piezo pockets, and put your glove on to double check they are tapped when you finger drum,” Stern continues.
“We found the best placement was not necessarily on the pad of the finger, for instance the thumb is around to the side and the pinky is across the first knuckle.”
Next, Stern solders the FLORA circuit, tweaks/uploads the sketch and adds MIDI support to Flora.
“Once your glove is functioning properly, it’s time to tack everything down. Put the glove on and position FLORA so that the wires don’t tug when you make a fist. Tape it down so it stays put before stitching,” she concludes.
“Use plain thread to stitch FLORA’s unused pads to the glove. On the side where all the wires come in, stitch around the wires instead of through the pads. Tack the wires in place with strategic stitches along their lengths. Remove the tape and try on your completed drum glove!”
Interested in learning more? You can check out Becky Stern’s full tutorial on Adafruit here.