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RSS > LED gets too hot with 9V battery

TurkishG	#1 14/02/2009 - 16h06 Top
Class : Apprenti Posts : 29 Registered on : 11/01/2009 Off line	I normally use 12V batteries for my cap but they seem to die(finish) too quickly so i made another battery bay for 9V but weirdly the LEDs get too hot when i use 9V battery... is it normal them being very hot or could this result in destroying the LEDs.. I didn't leave the 9V on use longer than a minute.. so don't know if the LEDs will be destroyed or not... Could anyone help me drop the temp on the LEDs with 9V or is it normal and harmless? Berk
vagos	#2 15/02/2009 - 22h53 Top
Class : Apprenti Posts : 22 Registered on : 12/02/2009 Off line	Tell us more about your connection, I assume that you are using only one resistor. What value are you using? I also assume that you are using small resistor value so you have great heat dissipation on the resistor and on the LED's. They are getting hot because a lot of current is going through them. Try to increase the resistor value (not by luck though) Use some equations or the LED Assemply guide from the Free Track website.

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