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RSS > resistor help please

kungfuking	#1 06/12/2008 - 22h25 Top
Class : Apprenti Posts : 1 Registered on : 06/12/2008 Off line	hi everyone after reading a few of these posts and trying the led assembly wizard my head is still a bit pickled can someone tell me if ive got this right so for 3 point model im using 2xAA rechargable batterys and maplin ld271 leds http://www.maplin.co.uk/Module.aspx?ModuleNo=2262&&source=14&doy=15m6 would i be correct to use 3x 18 ohm resistors and if i were to use a 9v battery would i be correct to use 3x 82 ohms resistors confirmation or correction of this would be much appreciated
tristan68	#2 12/12/2008 - 14h51 Top
Class : Electronicien en chef Posts : 651 Registered on : 10/07/2007 Off line	Hello Kungfuking with 18 ohms resistors and 2 AA rechargeable batteries, you get about 60mA in each led. So 18 ohms is a valid value , given your setting. Your 82 ohms value is Ok too, for 62 mA when powered by a 9v battery. But 1 res is enough in this case , since your then using a serial setup. cya

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