Path: ...!weretis.net!feeder8.news.weretis.net!fu-berlin.de!uni-berlin.de!individual.net!not-for-mail From: Jeff Liebermann Newsgroups: sci.electronics.design Subject: Re: Laser Mouse Date: Sat, 20 Apr 2024 19:07:42 -0700 Lines: 47 Message-ID: References: <8lit1jd210tmtl0p2h5dotog3ji7nsv8ph@4ax.com> Mime-Version: 1.0 Content-Type: text/plain; charset=ISO-8859-1 Content-Transfer-Encoding: 8bit X-Trace: individual.net a2OCNMjNaSUW5E+r3zyReQWtNymFb97XzzG8Y+/kPpwlqObafw Cancel-Lock: sha1:zwzJgvjsYp2M7Vvg78kHoLa1D8M= sha256:xE/J7a6Te7JC8Oh0ZrmMflxldjKBZPYIdhl309DSwq4= User-Agent: ForteAgent/8.00.32.1272 Bytes: 2852 On Tue, 16 Apr 2024 12:06:19 -0700, john larkin wrote: >If you have an Ikea desk and your LED optical mouse doesn't work right >(something about the optics of the varnish) this should fix it: > >https://www.amazon.com/dp/B08CRZ85DZ > >It was really annoying to be tweaking a PCB layout and having the >cursor wander around, or get stuck. I think that's called "hunting". This might help explain what's happening: "Optical vs Laser Mouse" "...both methods use the irregularities of a surface to keep track of the peripheral’s position. But a laser can go deeper into the surface texture. This provides more information for the CMOS sensor and processor inside the mouse to juggle and hand over to the parent PC." "This makes laser-based mice better for glass tables and highly-lacquered surfaces..." "The problem with laser-based mice is that they can be too accurate, picking up useless information such as the unseen hills and valleys of a surface. This can be troublesome when moving at slower speeds, causing on-screen cursor "jitter," or what’s better known as acceleration." I've done a little tinkering with both types of mice. I used a drawing program to draw a 1 pixel wide line. The optical mouse drew a fairly "sharp" edged line. The laser mouse drew a tiny sawtooth waveform (jitter). It can be cleaned up with averaging and damping, but that increased response time, which was deemed highly undesirable by the gamers in attendance. It was also possible to see building, motor, and machinery mechanical vibrations along the line. That disappeared for both types of mice when I used a rubber backed mouse pad or installed rubber "carpet protectors" under the desk legs. No advice. Just try a few different mice and use whatever works best. -- Jeff Liebermann jeffl@cruzio.com PO Box 272 http://www.LearnByDestroying.com Ben Lomond CA 95005-0272 Skype: JeffLiebermann AE6KS 831-336-2558