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Step 2Solder the resistor
For this step, you will solder the resistor to the longer LED lead, or the anode. This is the positive. The resistor is needed to ensure that the LED only gets 2.5 volts and 20 ma from your cars electrical system.
You will want to trim down the LED and resistors leg so that you don't have a large area of flimsy solder terminals.
When you are finished soldering, slide some shrink tube over the resistor to prevent a short.
You will want to trim down the LED and resistors leg so that you don't have a large area of flimsy solder terminals.
When you are finished soldering, slide some shrink tube over the resistor to prevent a short.
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Jan 2, 2010. 8:26 PMkrazy2727
says:
if you are doing a string of about 20, does each LED need a resistor on it?
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Jan 2, 2010. 8:26 PMkrazy2727
says:
if you are doing a string of about 20, does each LED need a resistor on it?
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3
Feb 15, 2008. 10:05 PMteatimest
says:
Nice instructable! Does the resistor have to be on the + side? Does the resistor itself have orientation (color bands)?
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11
Feb 17, 2008. 8:22 AMcomputerwiz_222 (author)
says:
The resistor can go on either side. Also, the resistor is not "oriented". We call this non polarized. An example of something that is polarized would be an electrolytic capacitor. The LED is polarized too. This means that it has a positive and a negative side.
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3
Feb 17, 2008. 6:04 PMteatimest
says:
Thanks for the thorough explanation. I wonder where do you learn those thins... I will work on my LED project now. Thanks!!!
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