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Step 3: Connecting the components together

Solder two wires on the stereo adapter, one in the front (ground) and one at the very left /right back (it doesn't better which side since it is a mono speaker).

Solder other components together as shown in the 2nd diagram. Remember to leave out red wire of the battery snap for the rocker switch.

Solder the red wire of the battery snap to the rocker switch. Solder another wire that connects the rocker switch and the positive terminal of the amp module.

If you don't understand the steps above . Look at the next step to see how the circuit is connected.
<p>Very Cool!</p>
<p>Thank you!!!!</p>
I would recommend not putting the iPod inside the case, as the magnets from the speakers could mess with your iPod's memory! Just a thought.
Nah it won't... these days electronics almost aren't effected by magnets (excluding CRT monitors), here you don't have a tape to blank when you run a magnet by it :D. it's all just thousands and thousands of transistors (in chips of course well by that i mean , let's say you have a cpu in one of the older versions i remember there are about 73 mil. transistors and that cpu is from 2001 i think so....)
<p>you don't have to explainit when you say something simple like you are the smartest one every.</p>
<p>I didn't quite get that, would you mind re-writing it a bit better. </p><p>Besides, the answer you replied to is 2 years old! </p>
I was actually responding to the other guy (zgybrwn) who responded to you. He basically called you a know it all for explaining your reasoning behind your comment to my original one. Also, not to nitpick, but my comment was worded properly in context, so I have no idea how to rewrite it for you.<br>It doesn't matter anyway, the guy was just being rude.
<p>Yeah, I got the part about me being a know it all, his comment just seemed unfinished the way it ended but I guess he/she doesn't speak English that well (not that I do).</p><p>The re-writing part was addressed to zgybrwn, I had no trouble comprehending you comment..</p><p>Also looking at the time our comments were send we must have sent them at the same time, hence the confusion about who replied to who.</p>
Did you read the &quot;we have a 'be nice' comment policy&quot; disclaimer below your comment? Dude was just explaining his/her thought process, on a website *designed* to share information. So if you don't have anything nice to say,gtfo.
Just wanted to give you some updated numbers:<br><br>The Tegra 2 (used in many smartphones but is being supplanted by the Tegra 3) has 260 million transistors.<br><br>Most modern desktop CPU's have between 250 million and 1.2 billion transistors, while server CPU's can have up to 2.5 billion transistors.<br><br>Modern desktop GPU's can have up to 4 billion transistors.<br><br>Most people will never encounter an FPGA (a sort of reconfigurable CPU), but they can have just shy of 7 billion transistors.<br><br>A gigabyte of DRAM (the kind of ram in smartphones and PC's) has about 8 billion transistors.<br><br>A gigabyte of Flash memory has either 8 billion (SLC) or 4 billion (MLC) transistors.<br><br>It would take a horribly powerful magnet to mess with any of it, since they all off specific electrical signals at certain voltages which are incredibly difficult to generate by accident with a magnet. As you pointed out the magnets were a concern for certain magnetic storage technologies. Even then, while a floppy disk could be damaged by an errant magnet in the pocket, even modern magnetic hard drives require much more powerful magnets to destroy the data without physically touching the platters inside (hard drives actually have quite powerful magnets sitting right next to the platters which don't affect the data at all).<br><br>Simply put, it's not likely you'll be able to get your hands on a magnet powerful enough to hurt your smartphone, and you most certainly won't be able to get that magnet to fit in your pocket.
Yeah, the cpu i mentioned wasn't from 2001 but from 1991 or so lol.<br> About the hard drives, i've seen the magnets inside and they're really powerful but as you said they can't erase the data, to erase the data (and probably completely destroy it) it would take a magnet about as powerful as an MRI or something bigger.<br><br>There's always a way :) and most of the time it's fun as hell!
Hello! <br> <br>I wonder if i can make it work with a 80 Watt speaker?
hows the sound? assuming that your using a subwoofer the bass should be outstanding
so if i am using 2 8watt 4ohm speakers then is a 30watt amp appropriate??
i bought one like this but allready built
panalo to dre! hehe gumawa din ako nung little gem and MKII na guitar ampli. this site is the best.. the ideas are the best..
I would try to link you on a site where to buy a 4 inch 20W speaker 4 ohms. I already have one and here in our country (philippines) it only cost $2 in php-dollar converstion. The speakers give a high quality BASS, MID RANGE and TREBLE. Its worth every penny. I could even be sold for $100 because of it's quality.
pls suggest me where to get the amp from...<br /> any preferable online websites ?<br />
That's nice, but 18W is too much for such a small speaker.<br />
how would you do this without the amp. ( I'm new to electronics.)
In my opinion: You can't feed speaker without amp. You could burn your device output.
ok thanks. i thought it would, but i wasnt sure.
ok i'm worrying bout something, surely if you are running the power from the 9volt through the stereo jack, it is being pumped into your ipod of mp3 player, doesnt that do damage to it? also, are the stereo jack, battery and switch in series on the input circuit?
of corse you could put a diode from th 9V
You could just make a simple aplifing curciut with transistors ans a potentiometer
But what if we don't get this type of amp in our country
it would be cool if there was a pot for a higher volume control other than what is on your I-Pod.
would a 15w speaker work with the 18w amp? and also, where can I buy most of these components... do you think radio shack would have it?
check a hobby store also
it might though, radio shack has everything.
yeah, it would work. I am not sure about radio shack coz I don't live in the US. Hopefully some people would be able to help you to find the components.
that's sweet...but what are you doing with a cd case if you have an Ipod?
ok, scratch that...I din't realize how big the speaker magnet was...but still sweet
Ok so I'm thinking about doing something like this but with two speakers. They are both 1W 4ohm speakers. I want them to still be stereo so do I need two amps? Should I use a 2W amp(s) or something else?
Or if I didn't have it stereo and I ran them both off of one amp could i use a 3.5W amp?
Can you make this operate 2 speakers like 2 head phones? Great project man! I love it! PS: comment number 101! hehe
its been a while since i studied but if the two left and right signals are being combined pre-amp it shouldnt need the resistors? (or is that to stop any distortion?) and i have a double cd case and im thinking of doing a double speaker version since this design only puts one signal through amp (if it works) then should be able to double up on everything except stereo jack... i.e using the two mono signal amps two speakers two switches connected as seperate circuits with negative of batteries to negative inputs of individual amps and those connections connected together at the ground terminal of the stereo jack and two different signals (left and right) going to seperate amps and concurrently speakers. Please comment on idea usefull feedback might jog my memory to whats being missed in the circuit (besides a fuse) ... thank u
wow, i wanna make one...A few questions though. Where can I Obtain these supplies, and how much would all this cost to make?
it would cost about $2-$6or$10 you can get the supplies on ebay,radio shack,dump or junk yard for parts from cars old radio and also from old toys,radio. i got lots of parts at home
Plz reply i luv the mini carbon cone woofer!
Nice Speaker M8 where did ya geddit from huh??!! I like the carbon Cone
I got my amp for GBP £10 and you could get the switch and the battery snap very cheap from a normal electronics store or order them on ebay. It only cost me £12 to make one. (Note that I took out the speaker from my old stereo so I wouldn't count that.)
what does this mean? £. Can you convert that to U.S. currency?
1 British pound = 1.9561 U.S. dollars<br/>
so how much would that be?
about $24
i already have enough speakers though it's just having the speaker right in the open on the case it will wreck it thought. What if like water get spilled or if you drop it? then you're screwed. You can obtain these supplies at any place like Wal*Mart or like Totem or even an electronics store and it depends on the brand the more expensive brand the more money it's gonn cost you.
i love the fact u added a power source other then draining the mp3 players power supply. amazing instructable

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