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Created On
7 Sep 2021 21:42:17 UTC
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3D printed switch prototype 4
New version (pink) compared with previous version (white).
The thick wire piece that bridges the 2 contacts has been replaced by a very thin (0.25mm) strip of PLA, with some conductive copper tape on it.
You can see that the problem of intermittent switch contact is pretty much solved, and also we now make contact before the very bottom of the stroke.
I got the idea for using copper tape from Riskable 3D Printing: https://www.youtube.com/channel/UCSsm4h2ccJMdR6bsAFyIu6A - he is also working on a 3D Printable keyboard switch, although he is more interested in the switch feel than in implementing his own contacts, I think he is planning to use magnets and hall effect sensors instead of making the switching contacts part of the design.
From a quick test (and not pictured in video), it seems relatively easy to solder directly to the copper tape! This could be a game changer for so many things. You can solder the rest of your circuit directly to the copper tape, and stick the copper tape directly to the plastic parts.
...
https://www.youtube.com/watch?v=Usz55OThNjU
The thick wire piece that bridges the 2 contacts has been replaced by a very thin (0.25mm) strip of PLA, with some conductive copper tape on it.
You can see that the problem of intermittent switch contact is pretty much solved, and also we now make contact before the very bottom of the stroke.
I got the idea for using copper tape from Riskable 3D Printing: https://www.youtube.com/channel/UCSsm4h2ccJMdR6bsAFyIu6A - he is also working on a 3D Printable keyboard switch, although he is more interested in the switch feel than in implementing his own contacts, I think he is planning to use magnets and hall effect sensors instead of making the switching contacts part of the design.
From a quick test (and not pictured in video), it seems relatively easy to solder directly to the copper tape! This could be a game changer for so many things. You can solder the rest of your circuit directly to the copper tape, and stick the copper tape directly to the plastic parts.
...
https://www.youtube.com/watch?v=Usz55OThNjU
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