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 Resitor values with LEDS		  New Topic  Topic Locked
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Centari

USA
8 Posts
Posted - 03/21/2009 :  17:36:05  Show Profile  Visit Centari's Homepage
I know that adding higher values to an inline resistor will lower the voltage and brightness of a buld but hpw does increasing resitor values effect LEDs.

Bearcreekwest

USA
1308 Posts
Posted - 03/21/2009 :  18:56:07  Show Profile
quote:
Originally posted by Centari I know that adding higher values to an inline resistor will lower the voltage and brightness of a buld but hpw does increasing resitor values effect LEDs.




The resistor in line with a bulb creates a voltage divider network, reducing the voltage the bulb sees.
The resistor in line with a LED creates a current limiting network, reducing the current to the LED.
To answer your question, for the non-electronics person, the result is the same - increase resistor value, reduce light intensity.
Don
Lower Arizona
PRRT&HS 7555
OERM 2133
SASME
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Jens_Wulf

658 Posts
Posted - 03/21/2009 :  18:57:35  Show Profile
See for example LED Center: How is LED brightness related to current?. welcome to non-linear devices
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