Specifically, this one:

http://www.radioshack.com/product/index.jsp?productId=2102845&tab=summary

I want to cut up some of the pieces and am not sure if it has lead in it or not. Also, if I coated it with nail polish and it does have lead, would that make it safer?

I want to make sure that this 60/40 clear flux solder from radioshack (.063") won’t damage my tv. I need to replace a capacitor on my 37" lcd magnavox. Would rosin core be better?

I am building a mechanism for a mechanical engineering class where I need to have accurate figure of the mass’ RPM.

I plan on using infrared, and a disc with a small hole in it (rotates with the mechanism). I need the circuit to be able to count every time it "sees" the infrared light through the hole. I work for radioshack and I have access to practically everything I need to accomplish this, but I’m not a low-voltage electronic person. I am skilled at soldering and would have no problems if someone knows where i can find a simple schematic of this circuit.

If possible, I’d like a display of rotations per second (the calculations will be made using radians per second and would save a math step). That would be the slickest way to do it, but I know that would require an LCD/LED controller and will complicate it. Another way possible would be to have the circuit make a beep every time it senses light on the IR receptor everytime the light shines through, and just count it over a period of time. That’s what I would do last resort, but either way I won’t know enough of circuits to build one myself.

Any help would be greatly appreciated.
After reading what Edesigner suggested, I want to restate that I’d like to tackle this as a DIY job. I work for radioshack and everything I need for this circuit should be here.

In the essence of time, I may just have to resort to using beeps, which seems like it would be a much simpler circuit.

I have a 6v 50 MAh solar panel and a 3v dc motor. How do I reduce the voltage of the solar panel to 3 volts in order to power the dc motor safely?

http://www.radioshack.com/product/index.jsp?productId=2102822

http://www.radioshack.com/product/index.jsp?productId=2131051

Hello, all –

I am looking to build a simple sound activated switch for my Canon XT DSLR camera. The camera has a jack (3/32" stereo) that is wired in this way –http://farm1.static.flickr.com/146/359549791_83d835b78a.jpg

Hooking up a simple wire to the jack via a plug and closing the circuit will fire the shutter, so the jack has a current running across it. The current its, I think, 3.5V at .5A (i’ll try to confirm that, the lack of a multimeter is yet again haunting me).

I have a decent competency in reading circuit diagrams /soldering. All this has to do is close a circuit once there is a loud sound (Not fire a flash, etc).

My biggest qualm is hooking something with voltage up to a live jack — guides how to modify one of the following circuits would be best, or a separate diagram/description would work too.

http://www.electronic-circuits-diagrams.com/audioimages/9.gif

http://www.hiviz.com/tools/triggers/SNDTRIG.GIF (more me-friendly).

Thanks for your help!
something along these lines: http://www.radioshack.com/product/index.jsp?productId=2062479?

Basically I was wondering if there are any inexpensive electronic 'robots', LED displays, etc. that I can plug into my computer via USB (or anything else) that I can program easily using C++.

I just want to start learning how to develop software for basic robots, and program LED displays without building my own and risk damaging my computer ports.

Anything I can buy in Radioshack, Best Buy, Circuit City, all the electronic stores basically? Online stores will work as well.

Just… something I can program to move, display lights, etc.

Yesterday i lost all 1,500 songs from my ipod, dont ask me how, something happened. So then i pressed restore my ipod on itunes and it said the ipod was restored. BUt now when i plug in my ipod Itunes doesnt come on and a message is displayed syaing "the ipod could not be connected because itunes did not have the proper files" or something liek that, then it suggested i reinstall my ipod? What is goind on, should i try to fix it myself or just send it somewhere to be fixed?

If i should send it soemwhere, where should i send it? To apple or is there any other local electronic store (like circuit city or radioshack) that fix these problems?

PS- I am unbelievly mad i lost alll my songs, i dont want it to happen again. thank u.
dave and lauren, these are some of the worst answers ever.

I have recently started electronics and have bought a breadboard and soldering iron. What is a store where I can find most wires and components (I've tried radioshack no wire there). A real store please, not an online one. Also, what type of wire should I use for general circuits?

I have a python security module for my car, and it has a couple of fried circuits in it, I can repair it, but there are a few small parts that need to be replaced, it is a small, half round thing with 3 prongs less than a square centimeter (sorry) with a flat spot that reads c9012 H-550 I need a couple of those, where can you buy those electronic parts? radioshack? Thanks for any help.

i'm leaving to canada on a visit on16th on june and i'm looking for good stores like radioshack , where can i find any good other places like it where i can buy good circuit components in montarail.