Step 3: Cutting Parts

I bought a sheet of 3/4 inch plywood that perfectly fit 9 of my 8 inch circles. Draw them all out and then cut them all out at once with a jigsaw. The rough edges can just be quickly hand-sanded smooth.

We got 16 foam, 8 inch diameter circles out of the 2 foam mats. Because each pad needs 2 circles (once for under the peizo+sheet-metal layer, and one for above) this is enough for 8 drum pads. As with the wood, we just drew them all out with sharpie, then cut them out with scissors.

*For the first pad, we used 2 mouse-pads instead of the foam, but quickly realized that this would be far too expensive at 4 dollars per mouse-pad.]

For the sheet metal circles, we just rolled out the aluminum flashing, traced our circles, and used the metal snips to cut them out. If you cut them out as squares first, then trim them to circles, it makes the process a lot safer and easier. (The edges are sharp. Be Careful.)

There will be lots of left-over metal from the circles. What i did was salvage this by cutting out squares about 2x2 inches. these will be the mounts for the jacks, so they will also need a 1/4 inch hole drilled through the middle.

The vinyl can be cut into circles with a diameter of 8 inches or just under, depending on how you want your edges to look. mine are right at 8 inches, the same as almost all other parts of this design.
These circles can just be traced out, then cut with scissors.

The fabric circles will be the one element of this project that will be cut larger than 8 inches. These need to be able to wrap around the layers of wood, foam and metal, and be stapled on the underside of the plywood. A diameter of around 14 inches should give you enough to work with. This can also be traced out and carefully cut with scissors.

<p>This DIY cymbal pads from plastic plate</p><p><a href="http://www.instructables.com/id/How-to-Make-DIY-eCymbal-Pads-from-Plastic-Plate-fo/" rel="nofollow">http://www.instructables.com/id/How-to-Make-DIY-eC...</a></p><p><a href="http://galihgasendra.blogspot.com/2015/01/how-to-make-diy-ecymbal-pads.html" rel="nofollow">http://galihgasendra.blogspot.com/2015/01/how-to-m...</a></p><p>Check it ^_^</p>
<p>would this work?</p><p><a href="http://www.maplin.co.uk/p/3v-ceramic-piezo-transducer-5028-yu82d" rel="nofollow">http://www.maplin.co.uk/p/3v-ceramic-piezo-transdu...</a></p><p>to connect to the input on this, which i already have:</p><p>http://www.halemicro.com/wp/products/umc32m/</p>
Can I buy a set from u? If so how much for 10 pads?
Good job done by both of you..Can you please tell me what is the overall expenditure to make this product..<a href="http://www.ultrasonic-sensor-manufacturer.com/" rel="nofollow"><strong>Ultrasonic Sensor Manufacturer</strong></a>
So when you're using mouse-pads, you have to stack two on top of each other, do I understand that right?
Wooowww! Excelente! Gracias, thank you from Argentina!
aww yeah.. the instructable is cute ^^.. but i can't seem to find piezos locally.. thank you so much ^^
your sister is cute ^^
Absolutely awesome. I always wanted an electronic drum kit but I didn't think it was possible to make one.<br><br>Just one question. Do most drum modules come with the option to record your own drum samples? I'm a total noob.
Thanks! I know very little about the subject as well, but I'm pretty sure most modules do NOT let you record your own samples. You can instead hook up the drum pads through a different kind of interface so that they connect to a computer with the right software, and you can then theoretically program them to any possible sample.
I see. Now I have to find out what exactly that different kind of interface is ... Thanks!
http://drums-percussion.musiciansfriend.com/product/Alesis-Trigger-IO-Percussion-Pad-to-MIDI-Interface?sku=449754<br><br>Just an idea. I'm sure there are other brands, but this one keeps coming up when I did a google search. I think what you're looking for is called a &quot;Trigger I/O module&quot;. Also, with this I'm not sure if you would also need a MIDI to USB interface for your computer or if this has a USB output already.
Interesting.<br>Apparently you can also make it using an arduino.<br>This guy describes it: http://todbot.com/blog/spookyarduino/<br>I'm gonna try it that way using your pads! I'll keep you posted :-)
So do you have any kind of software so you could plug it into your computer and get sound out of it ?!<br />
&nbsp;I don't. I just use the external drum module with it's on-board sounds. If you got a trigger interface for the computer you could though.&nbsp;
Hey, this is looking awesome and im planing to try it! But I was wondering if the piezoelectric element is one of those things we can find in like ''sound playing greeting card'' , and that act as a speaker? <br /> <br /> Thanks !<br />
&nbsp;I may be wrong,but I think the speakers in those cards are usually just thin, cheap speakers of the regular magnetic design, with plastic speaker cones.&nbsp;<br /> <br /> Luckily though, the peizo's I used for this should be available at almost any Radio Shack, and only cost about $2.50 or so each.&nbsp;<br /> <br /> If you don't have a Radio Shack nearby, they can be found online from a large number of sites. You could just do a search for &quot;Peizo-Electric buzzer&quot;&nbsp;<br /> <br /> Good luck with your project, I'd love to see what you come up with!<br />
Hey, Thank you for your answer !&nbsp;I will do some research to know if the piezo buzzer is the thing I am talking about ! If not I will go buy it to the radio shack replacement : ''La Source'' and I will post news when ill be finished !<br />
so, benjamin, could you send me the french traduction of your tips, parce que je vis en france et que j'ai vachement du mal avec la langue anglaise... mais je trouve ton projet super intéressant... Thanks a lot.
I agree she is hot!
what is the foam? you say floor mat but i don't know what you mean by that. thanks
Well, one of the pads i did differently, and that was with mouse-pad material. ideally, this was the best. but the foam i used was what i found that was closest to it. pretty firm, so that you don't even notice the time it takes to bounce back flat when you hit it. It was just some sort or floor mat from target. Also, i completely forgot to take pictures of the rack and the complete set-up, but i"ll try to take some and post them this week.
also! i'd like to see your kit all put together. perhaps a video of the skills...?
Nice work.
This is the best, most solid DIY drum sensor I've ever seen. with the peizo and the sheet metal it will work just as well as any store bought one. and your sister is cute.
Thanks. I thought the same thing about any other designs on here or other sites. This was cheap, and it triggers great!

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