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happymaan · 09-20-2004, 04:21 PM

I got the following LEDS:

* Emission color : White
* View Angle : ±23°
* Forward Voltage : 3.2V-3.8V
* Luminous Intensity : 16000mcd
* Lifetime : 100000 hours
* Reverse Current : Max 30mA
* Soldering Temperature : 240 C for 5 seconds

I plan on using 15 of them hooked up to a 3V DC transformer I got. I know I would be under powering them a bit but I'm fine with that.

But then I was thinking how cool it would be to make it USB powered, so I read how I can get 5V DC from a USB cable. If I wanted to drop the 5V into the acceptable range can I put a resistor into the USB cable rather then have to hook a resistor separately onto each identical LED?

Thanks....

Happymaan

09-20-2004, 04:21 PM	#1 (permalink)
happymaan Insane Location: los angeles	Wiring LEDS I got the following LEDS: * Emission color : White * View Angle : ±23° * Forward Voltage : 3.2V-3.8V * Luminous Intensity : 16000mcd * Lifetime : 100000 hours * Reverse Current : Max 30mA * Soldering Temperature : 240 C for 5 seconds I plan on using 15 of them hooked up to a 3V DC transformer I got. I know I would be under powering them a bit but I'm fine with that. But then I was thinking how cool it would be to make it USB powered, so I read how I can get 5V DC from a USB cable. If I wanted to drop the 5V into the acceptable range can I put a resistor into the USB cable rather then have to hook a resistor separately onto each identical LED? Thanks.... Happymaan