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What would happen if I changed the LED in my optical mouse to say, a green or UV (ultraviolet) one? Answered

I'll make sure to get the right size,brightness,voltage and current LED, but would the optical sensor still function with a different color?
and does anyone know why they use a red LED, or is it just easy/cheap for manufacturers?


I have changed the LED on my mouse from red to blue to UV to green and to white. And to be honest, I have noticed no difference in performance what so ever. All the LED does is light up the surface it’s on so that the 'censor' (which is really a bloody fast camera) can take images and compare them to each other the 'track' your mouse movements. Although you should try stay away from infra-red LEDs, not all mice censors can see that light spectrum. And you’re running a laser mouse, leave it alone. Hope this helps.

As iceng said, it most probably wouldn't work as the detector will not be sensitive to the new colour.

And to add to the problem most if not all modern mice have a kind of integrated sensor - LED and sensor in a single part.

If it is just for the effect, you can always add an additional LED somewhere inside the mouse although that will drain the battery faster for a wireless device.

Well, I have the black Apple Pro Mouse that I've gotten a couple of for $6, barely used, wired.
So I'm thinking I'll just wire in a 5V LED where the USB cable attaches to the circuit board?


7 years ago

it would fail or barely work.

Changing the LED color without matching the photo detector to the same color is uNgineering.

I'm going to do research on the sensor/photo chipset


7 years ago

I believe that it is a laser and not an LED. It reads surfaces in a similar way that a cd drive reads the CD's . It has to be bright enough to bounce back off the surface and then through an optical system to a sensor. LED's would not work because they would not have a cohesive enough light. They would spread out and not bounce enough light back. Some of the newer logitech mice are using ones that are not visible to the eye. Not sure if its UV or infrared.

Well, I'm not talking about the new laser mice, but the much older optical mice. I know for a fact that they use red LEDs, but I was just wondering if I could change it. I guess I'll just try it.
The laser mice are much more complex and expensive though.

It wouldn't respond that well since the LED is chosen due to the sensitivity response curve of the sensor chip.