Step 4: Gang Mold

This mold is simply a slightly more complex version of your block mold. Start with several rectangles of foamcore. Adhere them to the mold board, and then spray them with a sealant or shellac. Then glue down your parts with a daub of hot glue, this makes things a little simpler to arrange and cast. Fill this mold with silicone exactly as prescribed in the previous step.
Love this.
Wishing I still had my guitar right now :-(
Very nice!!
Very creative. Thanks for the good idea.
This is cool, thank you
Try putting a really tiny amount of plasticine clay at the seam where the board and the part come together. This will help secure the part to the board and keep the silicone from flowing under the part. Makes for a cleaner and sharper edge.
Due to price of silicone and my inability to find any without ordering online (which I'd prefer not to do), could plaster of paris be used instead? Also, When I've got the LEDs in, I don't want it to be like a small light coming from the center of the button, I want the whole thing to be lit up. Would the best thing to do be make clear buttons with Bondo and colored LEDs? And finally, what's the best kind of LED to use? I don't want it to be blinding, but I want the button to be very well lit up (so almost blinding :P). I also want it to last as long as possible on a 3V battery. Thanks for the help and amazing tut!
Plaster of paris would not stretch like silicon would, so you'd have a harder time getting the parts out and you might not get as good of a mold. I made totally clear buttons and colored LEDs and the whole button lights up for me. Sharpie markers work well for coloring LEDs. I used 5mm white LEDs with a recommended voltage of 3.3-3.6, but I've been running them pretty well on 3V. Bear in mind your fingers will be covering any button that is lit up, so the light will be reflected back through the button.
OK, thanks. 2 more questions; 1. I've noticed in a picture on the LED instructable that there are little black strips on the new button. The current buttons have these on. Am I supposed to remove them and put them on the new button? 2. Where is a good place to buy LEDs, or more specifically, in Canada. Retail prefered, but online works, I guess.
1. the black strips are removable. 2. I got mine from Radio Shack, though I don't know if they're in Canada. Their website would probably be able to ship them there.
Radio Shack is in Canada but its better to go to The Source ( used to be partnered with radioshack but no longer)
translucent white paint paint the inside of the key with this paint
Can anyone give me a rough estimate as to how much the materials for this project would cost altogether?
I managed to make a mold just fine, but the resin came out funny on me again. Even after letting it sit for a day, it was still very tacky. Does that mean I'm not adding enough of the catalyst?<br />
Well, I'm attempting a strum bar version of this mod, and it's worth noting that the mold for that part is much more difficult to manage.<br /> <br /> Also, for sticky parts, I'd recommend low-heat baking of the part. &nbsp;It'll harden it up a bit-- just make sure you don't melt it.<br />
whats "the touch" and "the power"?
deadpan comedy.
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So, if i only had 3v of power coming from the battery, when two or three buttons are lit up at the same time, would they shine less bright?
not noticeably.
Where can you buy these products. alot of the hardware stores near me do not carry them. They're a bit expensive so where coiuld I get them cheap
They're just kind of expensive. I haven't yet found a cheap way around it. I'd look and see if there's a branch of Tap Plastics around you, or Freeman MFG, or Smooth-on, or SilPak. Otherwise you'll have to order online... doesn't much matter though as it's usually just as expensive in the store as online.
I used this little kids toy called zubber instead of the omoo because it was only 8 bucks instead of the twenty that i would've had to pay. You just mix the white activator with the colorful, play-do-like zubber, and let it sit for 15 minutes. here's my mold.
zubber mold
after it sits for 15 minutes it hardens like rubber.
i also found it could save you from having to by bondo. The castings come out with a lot of residue/dust, so you get the opaque feeling from that. So actually, including that i used casting epoxy instead of resin, and not buying bondo, I payed $15 instead of whatever it would normally be for the omoo silicone, the sealer, and the bondo. Hope this saved someone time and money. It did for me.
its not as clean looking though
please comment if this helped
Wow! Kudos for massive creativity! This is brilliant! Sheer Genius!
For the crystal clear spray, can you offer any recommendations on what I should use?
You can actually make a plastic with sulfur that can be poured into molds and machined. It's called sulpho plastic. Go to my instructable to find out how to make it here <a href="http://www.instructables.com/id/Super-cheap-strong-castable-SULPHO-PLASTIC/">http://www.instructables.com/id/Super-cheap-strong-castable-SULPHO-PLASTIC/</a><br/>
Is it possible to set the LEDs in the cast during this step instead of drilling out cavities for them later? Or at the very least, maybe using another mold to prepare a cavity for them later?
It's possible to mold the cavities during casting, but it'd be more trouble than it's worth and it would be more difficult to ensure a uniform location for each hole. If you were make a new mold with the cavity already in place, you would have to make a two-part mold.
was you decision to make the keys translucent just a personal choice, or does it improve the effect or have some other positive effect on the overall outcome?
theres another instructable on putting LED's into the keys for awesome play effects - you could make the keys look however you like - its your guitar lol
I thought my intent to add LEDs was implied. I asked because I wondered if translucency would make the light more visible within the key or improve it in some other way. I'd just as soon cast transparent buttons and sand them for light reflection, but I figured I'd ask first.<br/><br/>I do have experience btw: <a rel="nofollow" href="http://www.scorehero.com/forum/viewtopic.php?t=72498&amp;start=135">http://www.scorehero.com/forum/viewtopic.php?t=72498&amp;start=135</a><br/><br/>I will be putting the LEDs in a different guitar though.<br/>
would you be willing to sell the guitars original fret buttons to me
No. I'm not going to be selling any part of this project. It's just not worth the effort of tracking ten or twenty purchases and invoices and shipping as many packages when I already have a pretty intense job. I'd suggest you track down some returns at Wal-Mart or a game store to see if there are broken controllers you can just have.
<div style="margin-left:15px;"> <object width="425" height="344"><param name="movie" value="http://www.youtube.com/v/KUzNcheoY6U"></param><param name="wmode" value="transparent"></param><embed src="http://www.youtube.com/v/KUzNcheoY6U" type="application/x-shockwave-flash" width="425" height="344" wmode="transparent"></embed></object></div><br/><br/>This is my younger borhtr<br/>
Are you serious? What's his full name?
No, i needed proof! That's my 2nd 2nd assistant space whale scrubber's cousin! his name be's ben... everly.
that's my dream job. want to see a spreadsheet about it?
I would love to see a spreadsheet! While we're talking about dream jobs, I want to be the guy who flies around on a goldfish, painting clouds in with an oversized novelty toothbrush
hey, where'd you get an imagination?!
It helps when you're best friends with the Big Cheese.

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Bio: I'm M@. If you know Prototype This, TechShop, The Best of Instructables, Show Me How, or AVPII: Requiem, you've seen some of my ... More »
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