Thanks.I had a battle with the Industrial Design team at Apple. They wanted to change the LED to a white one!
Yes, about 660 nm is the right wavelength. You need to use a physically similar LED because the light will be focused on "rolling surface" and if you use the wrong size LED it won't work.
You might also find that you need to slide the LED further back from the optic to get it to work. Unfortunately you cannot push it forward.
Hi,
I tear down a optical mouse and try to replace the LED of 3mm, it was 5mm, all red, but the replaced one does't flashing and just dim light.
should I used exactly same wavelength LED? how to test it?
Thanks
Adam
View attachment 239683
Thanks.Out of curiosity: why should you replace it?