Step 5: Readying the Relay

For this step you will need:
-Two (2) power inverters
-One (1) Relay
-Two (2) 9V snap connectors

The following link is has the specifications for the relay we used and suggest you use:


NOTE: For EVERY connection made in this step it will be expected that you slip heatshrink onto one of the wires prior to soldering, and then proceed to cover the connection with the heatshrink after soldering.

Solder a lead wire onto each of the pins extruding from the relay.

TIP: Take the lead that you are going to solder to a pin on the relay and wrap it tightly around the solder you are using so it makes a sort of coil. Then pull the solder out and, without undoing the coil, slip the lead onto the relay pin. Since the relay pin is fairly inflexible and is also similar in size to the solder the coil should fit snugly around the relay pin, keeping it steady for you to solder a good connection.

Solder the Positive DC Load pin of the relay to two positive wires of your 9V snap connectors.
NOTE: In this step you will be soldering three (3) wires together: the lead coming from the relay, and the two positive leads coming from the snap connectors.

Next, solder the negative DC Load pin of the relay to the two positive wire from both of the power inverters. NOTE: In this step you once again will be soldering three (3) wires together: the lead coming from the relay, and the two positive leads coming from the power inverters.

Next, solder a short (two (2) inches or so) piece of 22 gauge solid wire to the end of the POSITIVE DC Control pin lead wire of the relay. Leave this wire aside, you will connect this wire in a later step.

Pretty Lights YES! <br>Wonderful shirt as well. yeah.
could i do this project with an image like this ? its great! but this would be more my style :)
Such an amazing shirt.
how do you actually connect<br> the wires to the tape? and where do you connect them?
Great instructable! We've taken alot of what you have done here and applied i to a foam core sign. BUT...were trying to get that same responsive effect out of the escudo and are hitting some bumps in the road. I noticed in Step 11 you talk about the code, but its not actually posted anywhere that I can see. I'm assuming that its similar to the code in the long_beat.pde from the UV meter project. Is it up anywhere? would you mind putting it up or PMing me with some more info? thanks and keep up the great work!
&nbsp;Awesome tutorial!!! Whats the name of that song?
&quot;Finally Moving&quot; - Pretty Lights
love the moon :)
Ah i want one! O.O<br /> lol good idea :)
really cool instructable dude&nbsp;:) but... the VU meter is kinda too expensive instead of buying it u can buy far more better tshirt with VU meter but not the real VU meter its kinda programed on loudness and with 2 AA&nbsp;bateries... just if u could find some better alternative than this VU meter would be cool... and btw 4x 9V batteries?!<br />
I really like this project and idea. truly brilliant.<br /> I was wondering if a jacket would make for a more comfortable design&nbsp;(putting the actual EL&nbsp;design on the back)&nbsp;since there would be less stress on the body, plus, the batteries could be stored in a pocket. All I see&nbsp;you&nbsp;might have to do&nbsp;would&nbsp;be to extend the wiring so all of the components were on the front side flaps of the jacket so they did not get crushed when one went to&nbsp;lie back in a chair
Great documentation for a freshman project. I just overheard one of you talking to Larry Monke about this project. Good work. Nice 'ible.<br />
&nbsp;do we need 7 or 8 JST 2 connectors. You said 7 up the top but reference 8 in the writing. also, i couldnt find the JST 2 connectors on the website. <br /> Thanks
You need seven (7) JST connectors. I apologize for the typo.<br /> <br /> Also here is the direct link to the connectors: http://www.sparkfun.com/commerce/product_info.php?products_id=8670<br /> <br /> Thanks for your feedback<br />
Cut sixteen (14) pieces of conductive tape? plz fix<br /> <br />
Well one suggestion for the power and arduino board is a cell phone belt holdster. Its not the best looking thing in the world but it will remove most of the weight from the shirt. The only thing left on the shirt would be the extra fabric, the el sheet and some wiring. Another idea is maybe using a cell phone battery and upconverting to the voltage required. This way you may get more power from less battery.<br />
What an impressive project!&nbsp; This write up is one of the most detailed and complete I've seen, and it's a really cool result.&nbsp; <br /> <br /> Pragmatically, how comfortable is the shird to wear?&nbsp; The panel doesn't look particularly flexible in the images, and there's a fair number of wire connections and solder-like bumps.&nbsp; <br />
as one of the co-creators of this project, I would say that the front panel is alot more flexible then it is made out to be. It is a lot like a laminated piece of paper. So it really is not that bad. The big issue with the project at the moment is the microprocessor used as well as the power. These make the required components quite large and&nbsp;unwieldy&nbsp;to keep tucked in the back. Our next iteration of the design will attempt to remedy these problems.<br /> <br /> Zack<br />
Thanks! The shirt is definitely not the most comfortable thing to wear. It is also not the most aesthetically pleasing in the back because of the Arduino Mega/EL Escudo. The biggest &quot;lump&quot; are the four 9 volt batteries that must be carried. Also, their weight does pull down on the back of the shirt. We are working on a 2nd generation shirt where we will primarily address the power issue (ie find something that supplies enough power for EL&nbsp;sheeting, or find something to replace EL sheeting that does not require as much power)&nbsp; <br /> <br /> As to the flexibility of the front panel it is really unnoticeable unless you bend all the way over. However, for just wearing to walk around the current flexibility capacity makes for it to be comfortable to wear in the front.<br /> <br /> Thanks again and please let us know what you think so we can make our next design even better!&nbsp; <br />

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