Teardown a optical mouse and how to replace the LED?

Thread Starter

LAOADAM

Joined Nov 21, 2018
518
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

P01.PNG
 

DickCappels

Joined Aug 21, 2008
7,426
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.
 

Thread Starter

LAOADAM

Joined Nov 21, 2018
518
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.
Thanks.
I have lot of different LEDs, how to find a 660 nm one?
 
Top