Step 6: multimeter testing

Measure the resistance of your stitching.
Switch the setting of your multimeter so that it measures resistance. Measure resistance from the + of the power supply to the + of the LilyPad, and the - of the power supply to the - of the LilyPad. If either of these resistances is greater than 10 ohms, reinforce your stitching.

There are two ways to reinforce your stitching. If the resistance is barely above 10 ohms, you can reinforce using more conductive thread. However, if the resistance is extremely higher (greater than 50 ohms), you can reinforce using conductive fabric, which has much lower resistance than thread. In order to do this, cut a strip of conductive fabric and iron it onto the back side of your garment such that both ends of the strip are touching your stitch path. Then, make several stitches from the conductive thread of your original path, and stitch onto the conductive fabric (so that the stitches you're making are on top of the conductive fabric (see photo below)) so that the thread and the fabric are connected. Repeat for the other end of the strip. This should greatly reduce your resistance.

Also check resistance between the + and - stitch paths. If the resistance is less than ~10k ohms, you likely have a short. This may be because a fine hair from one path is touching the other path. Trim the hair, and you should be okay.

Test your stitching.
Once you're certain that you have no shorts, put the battery into the power supply and flip the switch on the power supply to the on position. The red light on the power supply should turn on. If there is no red light, turn off the switch quickly and see whether there is a short between your + and - stitches.

If the red light is on, press the switch button on the LilyPad main board. The light on the LilyPad should blink each time you press the switch. If it doesn't, the resistance between your power supply and LilyPad is too high, and you should reinforce your stitching.
<p>I liked your project because I got a thought that it would help me with mine. I need to make flexible touch sensors. I was all like 'oh, cool let's do this!'. I read the code carefully, your instructions about stitching, started doing things finally but couldn't understand how the fabric sensor supposed to work if it's connected with a single wire and THEN..... i payed attention to the phrase &quot;how conductive you are&quot; !!</p><p>So, basically you <strong>run</strong> <strong>electricity</strong> <strong>through</strong> <strong>your</strong> <strong>body(!!)</strong> when you touch both pieces of fabric to close the circuit. It's very low voltage of course but is it fine still? What if someone has heart stimulator or something?</p><p>And i guess this works with the bare skin only and two pieces of fabric...</p><p>Don't get me wrong i still like the project :) </p><p>....just found some minus points</p>
I want to make this project but I was wondering where you got the speakers from, and what are the details of the speakers used here (model number...etc). I am having troubling sourcing speakers so it would be great if someone could help me! <br>Thanks!
Hi, can I use a <a href="https://www.sparkfun.com/products/10274" rel="nofollow">Lilypad Simple Board</a> instead of the main board?
Yup. Just be sure to modify the code to map to the correct numbered pins.
and can I also get http://littlebirdelectronics.com/products/lilypad-arduino-328-main-board for main board and breakout
Yes, that looks fine.
-do we have to use <br>LilyPad Arduino main board<br>LilyPad USB Link<br>LilyPad power supply<br> 12 LilyPad LEDs<br>or can we use different brands than lily pad <br><br>for led, power supply does it have to be lily pad
You can certainly use non-LilyPad microcontrollers and sensor components, as well as LEDs and power supplies. However, the useful thing about the LilyPad is that it's light-weight, lies flat, washable, and easy to sew into fabric.
oh mah gawd! OvvO I must build this awesomeness!<br><br>seriously, I have got to build this! just because i should, ya know?
what kind of speaker did you use?
Wow...really good!<br><br>What would it take for you to marry me?! :P<br><br>Actually...how or where did you learn all this stuff? :)
<strong>Need a video!!!</strong> This looks awesome!<br/>
any video?
A video will be posted in the next week or so. =)<br/>
A video would be great, looks cool :)
Fantastic, I love it! i was going to make a turn signal jacket using my Lilypad I just got, but now I may have to do something more like this.

About This Instructable


171 favorites


More by kanjun: soundie: a musical touch-sensitive light-up hoodie
Add instructable to: