21 thoughts on “A Gaming Mouse With Recoil Feedback

    1. > Concept was fun but not very usefull.

      The full RGB animated LED lighting on my motherboard, RAM, CPU cooler, and mouse prove usefulness doesn’t matter when it comes to PC gaming hardware.

  1. I was kind of hoping that they had tapped into the force feedback function from their game rather than just listening to which mouse buttons are pressed. I can’t blame them for doing it this way though.

    1. Actually, it looks like it might partially cancel it out. The haptics appear to push the mouse backwards in the GIF, which would somewhat correct for climb.
      I actually assumed that was the original intent, but I imagine that would be somewhat difficult to tune perfectly.

  2. The solenoids do not have ANY inrush current. In the opposite, an inductance does not “like” current changes, therefore it creates an inductive spike, which can damage contacts and transistors. The common solution against this in a DC circuit is a freewheeling diode. But another effect of this diode is to extend demagnetization time (release of the solenoid) if this is unwanted, you can use a varistor or zener clamping.

    1. Your comment got me thinking, just like that one pesky student who asks the brain-stumping questions in class. Inrush current on power transformers is definitely a thing, but circuit theory won’t explain it if you model transformers as ideal with a series inductance. The key is the nonlinear BH curve. Google “transformer inrush in 5 minutes” for a good explanation. So given the steel cores, these solenoids should indeed have inrush current as opposed to an air-core inductor.

      PS: You are probably right that the real issue is the big voltage spike on turn off.

    2. Yes, the collapsing magnetic field that occurs when the power is removed acts as s generator and creates an inductive kick that can spark and erode contacts. This leads to extra resistance when the contacts are engaged which then causes heating while engaged, continuously. This is how switchgear early detection of contact issues works, eg thermal camera or some kind of sniffer.

      Maybe it is time hackaday had a really and contacts article, there are many considerations, eg just one example is most people have no idea that many relay contacts have an important rating of minimum current, or life can be substantially shortened, due to the “self wiping” action not working properly.

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