Anatomy of a Mouse

Uncle Al

Posts: 8,669   +7,574
Excellent article! These kinds of dissections need to be put together in a large group so new computer users can better understand the inner workings of their computers. Personally, the simpler the mouse is, the better I like it. With arthritis starting to show up I simply no longer have the manual dexterity to use all those buttons, but for those that do, go forth and conquer!
 

mbrowne5061

Posts: 2,008   +1,202
Small correction: I am pretty sure that is not a potentiometer ("pot", for short). Pots usually have hard limits on their rotation, and they are usually less than 360 degrees apart. Instead, it is more likely to be a simple, non-addressable rotary encoder: https://en.wikipedia.org/wiki/Rotary_encoder, more specifically, its probably an incremental encoder https://en.wikipedia.org/wiki/Incremental_encoder. These don't have hard stops on them usually, and can rotate more than 360 degree. I supposed you could do the trick with a pot, but I am not sure why you would since it would probably be easier to do with an encoder since that would likely already be digital (and a pot would require an ADC somewhere in the system).
 

neeyik

Posts: 1,881   +2,207
Staff member
Small correction: I am pretty sure that is not a potentiometer ("pot", for short). Pots usually have hard limits on their rotation, and they are usually less than 360 degrees apart. Instead, it is more likely to be a simple, non-addressable rotary encoder: https://en.wikipedia.org/wiki/Rotary_encoder, more specifically, its probably an incremental encoder https://en.wikipedia.org/wiki/Incremental_encoder. These don't have hard stops on them usually, and can rotate more than 360 degree. I supposed you could do the trick with a pot, but I am not sure why you would since it would probably be easier to do with an encoder since that would likely already be digital (and a pot would require an ADC somewhere in the system).
Thanks for the feedback - I should have done a proper autopsy and pulled all of it apart (which I've just done so!), and you're right: it's a rotary encoder.

rotencoder.jpg

I'll add a comment to the article to reflect this. Thanks once again (y) (Y)
 

lazer

Posts: 427   +128
Read with interest the article since I just replaced a great expensive wireless mouse that the wheel started to miss the clicks with a cheap WIRED no name mouse.

The cheap mouse works as good as my former expensive one, so I bought a second back up for when this fails. Let's see how long this works....