World's thinnest programmable leather bracelet!

World\
Button-schemer, by Aniomagic, is such an amazing little widget. It's an ambient program reader the size of a nickel which is programmable with specially timed flashes of light. With it, we will make the world's thinnest, programmable bracelet.

I've already found a whole bunch of uses for the bracelet: it makes me visible during night bike rides on the way home; it makes an awesome raver strobelight (I have a special accelerometer built into mine); I can set it to count down how many minutes I have left during a presentation; it reminds me to move my car after two hours so I don't get a parking ticket ; and it makes a handy flashlight in a pinch.

And the really cool thing is, if I need to change its behavior, I can do so really quickly and easily whether I'm on the desktop, handheld or phone. I write and upload programs directly from a web-browser, and a scheme interpreter flashes a part of the screen like morse code, which is read by button-schemer. This way I don't need special software or any extra hardware. Because of its built-in light sensor, it can also respond to other lights in the environment, or - get this - program another bracelet!

As we all know, one recurring problem with wearable electronics is how do you program it if you don't want to bring your whole development system and hardware with you? How tiny can it be if it contains extra hardware to talk with your computer? Another problem is the need for bulky battery holders. Read this tutorial to see some of our solutions to these issues.

To make your own, you'll need our kit (it's the tiniest you'll find anywhere), but this tutorial has a ton of ideas about making your own wearable electronics. For instance, designers should aim for ultra simple wiring, perhaps making a system bus so that end-users would need only two wires throughout their garment. Right now, even simple computational projects need a lot of different stitches (which must not cross). This project also hints towards the future of mixing craft with programming, so it's worth reading even if it's just to gain insights for your own unique projects.



 
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Step 1Preparation

Preparation
First, a few words about the button-schemer system.

It's designed to be very easy to hookup but it's picky about what it's connected to.

- The two holes on either side of the button-schemer connect to lightboards and switches only, and you can use more of both in your design, for some kinda weird bike-wheel-flashing-light project.

- It has a voltage booster to make the lights bright on a CR2016 battery, and it runs until all the juice is gone.

- The switch has a 1K resistor. This is because lightboards and switches use the same line. Take note if you plan to use your own switch.

Ingredients (all from Aniomagic Store: http://www.aniomagic.com/store )
- button schemer
- 4 lightboards
- 1 button switch
- pre-cut piece of leather
- matching brass snaps
- conductive thread
- thin battery (CR2016)
- adhesive-backed liners.

Everything listed here comes in a kit, and the leather strap has the snaps already attached. We've also laser cut holes in the strap because leather can be tough to sew through, and it strips conductive thread, reducing its conductivity.

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29 comments
Jul 2, 2009. 5:43 AMdark clerick says:
could you get this stuff from a store like radio shack?
Sep 29, 2011. 3:26 AMnemoskull says:
for the conductive thread, try a Jo-anns fabrics, or even the walmart fabric department. sometimes they have stainless steel thread, of some metallic thread that is somewhat conductive.
keep in mind, i have never used these. i am new to this etextile thing. it sounds cool!
Jun 24, 2009. 9:06 AMdunnos says:
wow, i am most definetly going to try and get the parts! its awesome! so all the parts are from 1 source? maybe i can get my parents to cooperate and let me buy them :P
Jun 25, 2009. 6:10 AMdunnos says:
being a kid doesn't make me a beginner >:( anyway, i own an arduino and designed and built several BEAM bots also, if i let my parents decide i will probably end up with the wrong parts :0 is there a possibility to get all the parts cheaper? i dont get much allowance and $40 is a bit expensive for me. I know i can get most of the parts from school but i don't know about the button thingy. Thanks in advance!
Jun 26, 2009. 7:13 AMdunnos says:
Oh, I'm sorry, I guess I read it wrong =/. I am new to etextiles but I also sew alot and I am pretty handy with that kind of stuff.

Anyway, just for the sake of having fun, is there a way for me to make my own schemer? For thread I think I can use some copper wire strands thingy's (I am SO clear here :P) . What do you think about that? would it work?

Sep 29, 2011. 3:25 AMnemoskull says:
just my 2 cents. can you program AVR, a.k.a. ardunios, or the like? thats what this is. a simple one cost 4 dollars, 2 if you pay for shipping. if you have an old computer with a parallel port, you can make a programmer with just a printer cable and a few resistors. not very reliable, but it works. once you got some basic code down, its just a matter of imagination.
Sep 20, 2009. 12:13 AMDrCoolSanta says:
I'd just suggest you to get the supplies as mentioned. The thread is designed to be used for these purposes and copper wire won't be a very good alternate.
You know you are a beginner, start with the right material I leave the author to do the detailed stuff, this is just my opinion.
Also a schemer, no, just don't.
Sep 11, 2010. 12:33 PMmistercow.pnoy says:
Really amazing thing. I wish I had a good use for it to have an excuse to make one. I have a few questions though.

1)How long does it last per battery.
2)If it's programmed via Morse code, is there a key or something breaking down the commands into their Morse dits/dashes so that you could conceivably reprogram it manually with a flashlight or something?
3)Is there a possibility of using rgb LEDs?
4)Is it possible to put a cluster of LEDs on the board in the middle making for a brighter center light?
Jul 20, 2010. 3:38 PMbobalini says:
where and how did u hook up the accelerometer please tell i wanna make wanna for a girl on our first date.
Apr 8, 2010. 7:05 AMblackdogg says:
Ive a Lego spybot lying around on my desk, its programmable using a lightswitch but it respons tu the pc at first and doesnt accept the code, it turns of instead of playing the code, I allready added a led to the motor and the lights on top do all just turn off...
Jun 25, 2009. 3:39 PMBEAST14 says:
I went to the website and it wouldn't let me drag the colors to the bracelet. I am currently using a super slow computer, could that be the problem? I will try again once I get back from my vacation.....stupid slowness......
Jul 20, 2009. 12:21 PMBriguy9 says:
Slow computers can do anything they want (not you, them), except listen to you and be faster.
Jul 20, 2009. 12:21 PMBriguy9 says:
We've all been there.
Jun 25, 2009. 10:59 AMflydogfly says:
Great instructable I made it and works GREAT
Jun 29, 2009. 11:48 AMflydogfly says:
no it seems to be working just fine with me
Jun 25, 2009. 3:26 PMBEAST14 says:
This is one of the coolest things I have seen in months. I believe that you are going to win the contest. I am going to go right now and find everything that I need and build one for myself.......maybe two.....
Jun 24, 2009. 2:58 PMmman1506 says:
what else could you do with the chip.a;so what kinda microcontroller is it running on
Jun 24, 2009. 2:59 PMmman1506 says:
with dome mosfets i could make an awesome robot
Jun 24, 2009. 3:00 PMmman1506 says:
and its 2 outputs putting out a low voltage im guessing
Jun 23, 2009. 1:17 PMtcup says:
Wow! I visited your site, I have a lot to study on there (I'm technologically challanged with most things). I can see this incorporated with my crochet. The grandkids would love it.
Jun 22, 2009. 6:03 PMshakna says:
Holy crap... It really is small isn't it? Useful, and fantastic use of the limeolight idea.
Jun 21, 2009. 11:39 PMacaz93 says:
wow ! so you just beam the program into the chip ? that's awesome !

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