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xero7
05-05-2006, 05:57 PM
Anyone know the voltage requirements for the Power LED on a 301.013?

...getting tired of the green one ...just wanted to liven it up a bit

DEWIE
05-05-2006, 10:14 PM
When LEDs first came out they where basically all the same as far as voltage and current but some of the newer ones may be a little different and I have seen some with resistors built in. But as long as you use a standard one of about the same physical size you should not have any problem, just make sure to put it in so that the polarity is the same. usually one side will be flat or one of the leads will be different. If you put it in backwards for a short time it will not hurt it, just wont work, you just have to take it out and turn it around.

xero7
05-05-2006, 10:50 PM
I have some left over from a PC case mod a few years ago, i remember at the time having to make sure the voltages were the same. Just wanted to make sure, i dont want to have to replace a reciever just cause i wanted a blue LED ;)

Replacement LED Specs:
Power Dissipation: 120 mW
Peak Foward Current: 100 mA
Continuous Foward Current: 30 mA
Reverse Voltage: 5 V
Operating Temperature Range: -20°C to 80°C
Storage Temperature Range: -30°C to 100°C
Lead Soldering Temperature: 260°C for 3 sec.
Luminous Intensity: 1200 mcd
Viewing Angle: 20°
Forward Voltage: 3.50 V
Reverse Current: 100 μA

DEWIE
05-06-2006, 05:56 AM
As it turns out blue and white LEDs do have a 3.5v to 4v forward voltage where as green and red are usally 2v forward votage and I think from the specs you list these are bright LEDs having a continuous current of 30mA where as most have 20mA continuous current. What this means is that the 301 has a resistor in it that drops the voltage to 2v @ 20mA when used with the standard LED and if the 301 is using 5v as the supply to power this LED it would make it a 150ohm resistor and that value resistor used with your LEDs would provide 2.2v @ 19mA making it dim if it would turn on at all. This calculation may not be valid becuase the 301 could be using a driver chip to drive the LED, but I do not believe that your going to damge the 301 but I also think that unless you can find the right resistor in the 301 to change, the blue LED is going to be so dim as to make it not worth the effort.