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Logitech has an idea for a “forever mouse” that requires a subscription
(arstechnica.com)
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this post was submitted on 30 Jul 2024
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Yeah, maybe work on making their switches not start double-clicking after a couple of years first.
I'm on my third-or-fourth one that has done this to me. Once this one gets too bad (they inevitably do) I am through with them. It's a shame because I really do like their peripherals. The mouse that convinced to keep buying them was an excellent device that lasted a very long time and I only replaced because it was a dinosaur. I used their solar powered keyboard for a decade-and-a-half, too, until I accidentally dropped something on it and broke it. Now, the switches in their mice die on me after a year or two without fail. They've clearly cheaped out on components. Fuck em. Goodbye Logitech. I will not miss their software.
The annoying thing is that fixing the double click is stupidly easy. Years ago, I got frustrated with that exact problem (after a string of 3 mice that each lasted only a few months); so I opened one up and soldered on a random capacitor I had lieing around.
Capacitors like that cost literally less than a penny, and are no more complicated to install at production time than any other component already on the circuit board.
I didn't know it was a capacitor. I thought it was bent springs. I managed to fix one once by opening up the switches and bending the springs back, but it went back to double clicking within a month, and the process was not easy. I've got huge hands, and those switches are tiny.
The actual difference between a working new mouse and a failing double click mouse is in the button itself (mechanical parts are almost always the problem).
However, it is not some exotic failure mode. All mechanical switches have a "bounce", where the contact makes and breaks a few times before settling into the connected position. Switches are typically designed to make the actual contact spring loaded (which is the origin of the click sound you here). As they age, this mechanism degrades, making the bouncing problem worse.
However, this is a well understood problem that any electrical engineer should be familiar with. One solution is to install a filter capacitor. Now it takes longer to switch between the on and off state, so the inherent bounce in the switch is smoothed out to the point where you cannot detect it.
They probably did testing with a new switch, and decided that they didn't need to include any explicit debounce component, ignoring the fact that the switch would degrade over its lifetime.
So, the capacitor can mitigate the spring weakening. Good to know. Replacing a cap is probably much easier than taking the switches apart and bending the springs.