Contributors

Light Up Bracelet – Dead-bug style

Share on facebook
Facebook
Share on twitter
Twitter
Share on linkedin
LinkedIn

Who doesn’t like blinking LED’s – especially when you link them to some sensory input such as Sound, for example. My maker friend Sohil Patel dished out a sound activated LED bracelet in time for Navratri, our nine day festival of Dance. He put up an instructable showing how he used a couple of simple parts to rig it all up – read about it here : [https://www.instructables.com/id/DIY-Wearable-Clap-Lit-Bracelet/](https://www.instructables.com/id/DIY-Wearable-Clap-Lit-Bracelet/ "https://www.instructables.com/id/DIY-Wearable-Clap-Lit-Bracelet/")

I thought it was something Samata would enjoy since she loves to dance, particularly during Navratri. Sohil’s diagram didn’t look alright – the LED anodes and the [+] of the battery are shown conected to GND, and when Q2 turns On, the LED’s get connected to GND on both sides (anode and cathode). Just the excuse I needed to crank up my favourite EDA program – KiCad – and churn out a corrected circuit.

![schematic of sound activated LED Bracelet](/assets/images/soundLED-650×490.png)

But why would I want to make a PCB for a circuit that uses just a handful of parts. No Sir, I decided to ditch using any kind of PCB, and make it “Dead-bug” style. Dead-bugging is an art by itself. See below some examples of functional and non-functional deadbug sculptures.

I soldered all the parts (2 transistors, 1 resistor, 1 trimpot, and the Mic) directly to each other, and then carefully wrapped the whole thing is a bit of kapton tape I had lying around (there’s only so much you can use for a 3D printer heated bed). I fashioned the eight 10mm blue LED’s in a long, parallel chain and hooked them to the “dead-bug” with short lengths of flex wire. Sohil originally used coin cells for his bracelet, but I had none lying around. Digging in to my part’s box, I came up with a LiPo cell rated for 8 Wh – enough to last a really long time. Here’s a video of the braclet on my ugly arms. [NOTE : Although I added a 10nF capacitor at the base of Q1 in the schematic, I didn’t finally use it in order to use one less part].

Deadbugging can be fun, and with some patience, you can create really nice, functional circuits or electronic art too.

[https://hackaday.com/2011/08/06/dead-bug-arduino-is-still-breadboard-ready/](https://hackaday.com/2011/08/06/dead-bug-arduino-is-still-breadboard-ready/ "https://hackaday.com/2011/08/06/dead-bug-arduino-is-still-breadboard-ready/")

[https://www.digitalfanatics.org/2012/12/amazing-freeform-arduino/](https://www.digitalfanatics.org/2012/12/amazing-freeform-arduino/ "https://www.digitalfanatics.org/2012/12/amazing-freeform-arduino/")

[https://www.artstudiopoint.com/home-improvement-category/insects-twisted-together-from-electronic-components](https://www.artstudiopoint.com/home-improvement-category/insects-twisted-together-from-electronic-components "https://www.artstudiopoint.com/home-improvement-category/insects-twisted-together-from-electronic-components")

[https://www.funnyjunk.com/funny_pictures/4285058/electronic+art/](https://www.funnyjunk.com/funny_pictures/4285058/electronic+art/ "https://www.funnyjunk.com/funny_pictures/4285058/electronic+art/")

[https://obviousmag.org/en/archives/2010/07/electronic_art.html](https://obviousmag.org/en/archives/2010/07/electronic_art.html "https://obviousmag.org/en/archives/2010/07/electronic_art.html")

Recent Posts

Maker’s Asylum: “It was so much more than just face shields”

Gemma Coleman speaks to Maker’s Asylum, a community makerspace in India, to discuss their ethos of open innovation and their effort to create a million face shields

String Art- Do-It-Yourself

String art is a fun activity to make a colourful picture by wrapping thread or wool around the nails hammered into the woodblock. 
Woodwork

Woodwork workshop

Woodworking can mean something different to everybody. It’s an opportunity for a few to pick up a new skill, and for some others, it’s a stress buster.

The Next BIG Thing in the Future of Education

To be precise, the Fourth Industrial Revolution has contributed to blurring the lines between the physical, digital, and biological worlds. It's a fusion of advances in artificial intelligence (AI), Robotics, the Internet of Things (IoT), 3D Design, 3D Printing, and Drone building.