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|10th June 2002, 17:22||#11|
commonly it are these standard values, multiplied with factor 1,10,100 ...
You can get more specific values, but they are more expensive (cfr . metal film resistors).
|10th June 2002, 17:25||#12|
It's always better to have a bit more resistance thus having a little bit less light output (not noticable imo)... always driving @ full speed is also not healty
|10th June 2002, 23:00||#13|
Could you add another option to the poll?
Because, you explained it well, but I already knew it so it wasn't interesting.
So, don't take that "No, this sux" vote as something negative .
|10th June 2002, 23:39||#15|
Join Date: May 2002
1.5+1.5+1.5= 4.5 (x100) Ohm
|12th June 2002, 13:55||#18|
Determinating Resistor Values
As an addition to Anthroplast's tutorial on how to calculate the resisitor value for led's, I'll explain here how to determinate what value a given resistor has.
First you take the resistor and look for the colorband closest to the side of the resistor (closest to the wire that comes out of it).
Now start writing down the color codes, starting with the first one (duh ).
After that just do this:
let's say we have written down the following red-orange-green-gold.
Then our resistor value would be:
The value then is: 23 * 100K = 2300K resistor with a tolerance of 5%.
This means the actual value can be anything within a range of 5% of 2300K.
There are also resistors with 5 colorbands. When you encounter one of these just place the digit of the first 3 bands after each other and then multiply with the 4th one, instead of with the 3rd one.
This would be:
So we get: 235 * 1M = 235M resistor with a tolerance of 5%.
|15th June 2002, 07:49||#20|
Join Date: May 2002
OR: you don't download anything and use an html page to determine the resistance
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