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Need project help with sound and led light please

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Need project help with sound and led light please

Postby celestialaqua » Mon Nov 14, 2011 3:11 pm

Ok, So I'm trying to make the item in the link below. The instructions assume you know how do the wiring job. But I need a little guidance.


I also want to make an LED light come on when it opens too. I have the switch mentioned in the instructions and I have soldering tools and the wire. I don't know if I need to run a wire from the MP3 player and the LED to the switch, meaning i should have multiple wires or not. I guess I have a lot of questions. I can use the MP3 player (instead of a sound recording module... unless it would be easier or wire that play button to the switch? would it?) but I didn't know if i could hook the LED light up to that board for a source of power. I don't know exactly what parts I would need, really that would be half the battle for me. Do I need a heat sink? Can I do this with just a regular LED bulb? do I need a resistor? I just need to make a light come on when the chest opens that glows a bit, I don't even need the light to go terribly far, I just need it to shine about a foot to make something in the box light up that will be translucent. Also, If I use the MP3 player, how do I attach the mini amp? I really am excited about all this but need some help since I don't know too much about this. Below are some items I was looking at that I thought I could use, but I don't know if they're too much for what I'm trying to do, or if they're even the right parts. The dome lens I wanted to use just to make my project look pretty and kind of as a buffer between the light and everything else. I will be hiding all the other electric stuff with a fake bottom. I would like to find the simplest most effective way to put this together. Opinions on parts and how to put them together would be greatly appreciated! :)






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Joined: Mon Nov 14, 2011 2:16 pm

Postby Thomas W » Wed Nov 16, 2011 5:25 pm

Do you have a SPDT switch like mentioned in the instructions, or perhaps a SPST?:
I think you would need a DPST or a DPDT switch instead when you want to add a LED to the project.

What do you want to use as power source for the LED?
Thomas W
Posts: 51
Joined: Wed Sep 21, 2011 6:12 am
Location: Silkeborg, Denmark

Postby celestialaqua » Wed Nov 16, 2011 10:33 pm

I was guessing that I could use The Mp3 player's power source. or if I picked up a sound recording module, I'd get one with a power source attached. http://www.ebay.com/itm/NEW-Didital-Voice-Recording-Module-20-seconds-Prewired-9V-Radio-shack-/180752386365?pt=Greeting_Cards&hash=item2a15ae893d#ht_1129wt_792 Something like that. Or can I just attach a 9V adapter if needed? I do have a SPDT switch as mentioned. I needed something that would trigger upon the box opening and closing with no need for having to do it by hand. Would it be a good idea if I had 2 SPDT switches? Or could you explain a little better why the other one's would be better? I liked that type of switch for the project but am totally open to suggestions.
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Joined: Mon Nov 14, 2011 2:16 pm

Postby Thomas W » Thu Nov 17, 2011 12:55 pm

Do you already have an MP3 player that you want to use for this project?
If you have, how many and what kind of batteries does it use?

The 3W Warm White LED needs at least 12 V, so you would need two 9 V batteries connected in series to get 18 V to run it.

If it's okay to mount 2 switches then the SPDT type is fine. You should keep the MP3 player button separate from the LED circuit, and this could be done with a single DPST, but using two switches is also fine.

If the LED DIY kits come with a heat sink you should probably mount it. The instructions in the box will tell you when, or if, you don't need to mount it.

Whether you need a resistor or not depends on what combination of battery and LED kit / LED you choose.

The mini amp you mentioned, what/where is that?
Thomas W
Posts: 51
Joined: Wed Sep 21, 2011 6:12 am
Location: Silkeborg, Denmark

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