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Resistors Answered

For people who don't know, how do you connect a resistor to a LED light?

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ledzep567
ledzep567

12 years ago

what happens if you just connect the led to the 9V without wires or a resistor?

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guyfrom7up
guyfrom7up

Reply 12 years ago

I've never seen it happen, but it could blow up

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Patrik
Patrik

Reply 12 years ago

Don't encourage him! :-D

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guyfrom7up
guyfrom7up

Reply 12 years ago

the government is now investigating into creating a LED bomb jk

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Goodhart
Goodhart

Reply 12 years ago

*LOL* I did that (years and years ago) with a resistor, hooked it inline to a home made battery charger (actually it was just a short), and when I plugged it in *loud POP*. The resistor evaporated.

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Patrik
Patrik

Reply 12 years ago

Works better with capacitors anyway. I remember an electronics magazine yeeaars ago published a "six-shooter" for they April 1st issue. Essentially just 6 large electrolytic caps they blew up using a voltage spike one by one.

At least they were cautious enough to warn people what would happen - you could *really* put someone's eye out with that!

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its a lion
its a lion

Reply 12 years ago

It didn't smoke when I did it... It was a green LED, burnt bright orange, then never worked again. You have to learn someway...

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Patrik
Patrik

Reply 12 years ago

Yeah - it won't work anymore after you let the Magic smoke out...

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Patrik
Patrik

12 years ago

Typically, you would solder them together, but I'll assume that "people who don't know" also don't own solder or a soldering iron. If you want to do more electronics, you may want to acquire one though. Here are some good intro pages:

How to Solder group
How to solder
Guide to field Soldering

And alternative, if you want to experiment with a variety of circuits without soldering your components together permanently, is to use something called a breadboard.

Solder, soldering irons and breadboards can easily be found for relatively cheap online and in stores such as Radio Shack etc. If you have any intention to do more tinkering with electronic circuits, they are pretty much must-have items.

In a pinch, you can also connect components by tightly twisting the wires together. If there's any movement in the connection, you risk having a noisy or bad connection. If necessary, you can fold the twisted part double, and/or wrap with tape to keep it more stable. Not nearly as good and reliable as soldering, but no tools required...

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GorillazMiko
GorillazMiko

12 years ago

If you want to find out what ohm you need, you can use www.ledcalc.com.

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Sunbanks
Sunbanks

12 years ago

What do resistors look like? Can you make them?

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Sunbanks
Sunbanks

Reply 12 years ago

Ah thank you.