Testing two different etched patterns for the edge-lit acrylic inside the PCB sides of the truncated icosahedron. Not sure if I like the star or flower designs better, or if I should use some other pattern. Opinions and ideas are welcome. I want each side to be partially transparent and partially etched. Eventually I'll add hot glue to help pipe light from the LEDs to the acrylic pieces at the corners.
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I think I've got it worked out now. This new etched pattern looks much better than the scored patterns.
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@geekmomprojects Oh wow!! Check that out!!
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@geekmomprojects Nice work!
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@geekmomprojects I like that the petal count matches the number of corners in the shape. Nice detail there
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@leonerd thanks. Since the acrylic is illuminated at the corner, I wanted one petal touching each corner which automatically imposes that constraint.
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@geekmomprojects That's very cool. Do you have a jig to hold the panels together at the right angle, or are you just bending the connectors until they fit, or ... ?
(Also. I really really hope this will be a shower cap with built-in goggles when it's done. 🤓)
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@kbob LOL, I did briefly contemplate placing it on my head, but it is too small. To get the angles right, there are custom electrical connectors made from tiny PCBs joining adjacent sides and custom 3D printed structural connectors joining the PCBs with screws at each vertex. Both connectors are designed to hold the sides together at the correct angles. The corner connectors are pretty sturdy, so I don't need a jig.
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@kbob here is a close up of the edge connectors (there is one for the pentagon/hexagon connections and another with a different angle for the hex-hex connections. Plus a view from the inside. If you zoom in you can see the small 3D printed connectors on each vertex.
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@geekmomprojects @kbob did you have to narrow the holes for these to constrain any slop in the angle?
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@gsuberland @kbob I should have, but didn't. The 3D printed corner connectors with screws are much more effective at keeping the angles correct than the edge connectors, especially as there is only one connector per side which allows for wobble. If I did it again I'd probably not even bother with PCB edge connectors and just use 3D printed connectors everywhere, and wires for the electrical connection.
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@geekmomprojects @kbob good to know! I've been pondering making an orb myself, so these lessons learned are super useful.
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@geekmomprojects @kbob That's such a nice puzzle :) I am quite fascinated by the projects you post lately.
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@geekmomprojects Thanks, that photo explains everything. I somehow failed to see the screws in the corners of the earlier photos. The connector PCB looks slick; too bad it's not really necessary. You've always been better than me about throwing out the overcomplicated solutions.
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@geekmomprojects Wow, these look incredible! :rainbow_heart_eyes:
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@geekmomprojects Maybe the clear bits should be more diffuse somehow?
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@geekmomprojects Nice! I like the star pattern, but if you're looking for suggestions:
Depending on the laser cutter, you may be able to get even more dimension from the etch using a 3d stamp setting, or grayscale, but watch out for any background color that could muddy the image.
It's also possible to get a nice effect etching different, complementary designs on both sides of the acrylic.
All the best!
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@K3n_5s thank you for the ideas!
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