Marks256 said:Ok, i would like to know how to use resistors. I know ohm's law V=I*R. But how do i use it? I also know that V=Voltage, I=Amperage, and R=Resistance, but where do i find the variables? With a multimeter/ampmeter? Could someone also give some real life examples? What do resistors ACUALLY do? I know they limmit current, but don't they effect voltage too? I am lost.
I do know a few thing about resistors, but i think what i know might be wrong. Will someone please re-explain them to me? As simple as possable. Thanks. I have learned alot from this forum so-far, i am hopping i can learn alot more. Also, what is the difference between voltage and amperage? Sorry for the simplicity of these questions, but like i said, i think what i know about these things may be dead wrong.
RadioRon said:The bulb has a fixed resistance that you can look up in the manufacturer's specification or you can measure with an ohmmeter.
JimB said:Not quite right.
eblc1388 said:Not according to the GIF image on this webpage on voltages across bulbs.
http://www.williamson-labs.com/480_ire.htm
eblc1388 said:Not according to the GIF image on this webpage on voltages across bulbs.
http://www.williamson-labs.com/480_ire.htm
Marks256 said:Please, tell me if this is right;
I just bought an infrared LED at Radio Shack. On the back of the package it says: Forward Voltage = 1.2v Forward Current = 100mA(0.001).
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