I would love an array of them in the style of old airport signages could be an amazing effect. Great work.
3D printed mirror array
91–100 of 152 posts
Re: 3D printed mirror array
#92Excellent. I wonder how practical it would be to put each mirror on a servo so that you can change the image in real time?
Almost trivial, if you're prepared to make the mirrors a bit bigger. I've got a 7-element array on my workbench right now. You want two servos per mirror, one for each axis. I'm using flexures for linkages between the servos and the mirrors, and universal joints made of magnets and ball bearings to hold everything together. The mirror tiles I'm using are 110mm across, flat-to-flat, which are bigger than this example, and that makes layout and assembly straightforward in a way that it wouldn't be if everything was smaller. Everything's printed in PETG, raspberry pi pico for brains driving a pca9685 PWM driver over i2c. The linkage geometry is the only hard part, the CAD and printing was pretty much a one-weekend project.
Re: 3D printed mirror array
#93Excellent. I wonder how practical it would be to put each mirror on a servo so that you can change the image in real time?
Almost trivial, if you're prepared to make the mirrors a bit bigger. I've got a 7-element array on my workbench right now. You want two servos per mirror, one for each axis. I'm using flexures for linkages between the servos and the mirrors, and universal joints made of magnets and ball bearings to hold everything together. The mirror tiles I'm using are 110mm across, flat-to-flat, which are bigger than this example,…
Should probably point out that with 2 servos per mirror you can match surface normals but not surface offsets. You can make each individual mirror match the gradient of a curve, but you can't make a curve like the parabolic dish in the GitHub link without a third servo per mirror. I'm waiting for more parts to arrive for that...
Re: 3D printed mirror array
#94This is future of the street art. Mount it using liquid nails to some place that is hard to access and point it somewhere where lots of people will see it during rush hour. Eg.: You can install it in such way that parliament building will get defaced every day during lunch hours by mounting on near building or tall lamp post. Or maybe put it on your own roof, that way nobody can remove it :-)
Word of warning: https://en.wikipedia.org/wiki/Aqua_Teen_Hunger_Force#2007_Bo...
That piece was done by my (then) neighbor.
It was a little unnerving to come home to a dozen black Suburban SUVs parked in front of my house.
Re: 3D printed mirror array
#95Earlier quoted context omitted.
You'd need the mirror planes to be adjustable in the XY tilt directions. Seems doable though, would be a cool next project
Or not? That’s an interesting challenge. Multiple messages depending on the light angle
Sort of the opposite of a digital sundial:
Re: 3D printed mirror array
#96I'm wondering how feasible it would be to repurpose this code for a concentrated solar power setup.
Re: 3D printed mirror array
#97Earlier quoted context omitted.
Excellent.
I've never actually been scared of stuff I built before, that's a first (and that doesn't mean that I shouldn't have been scared with other projects, just that I wasn't either because I wasn't aware they were dangerous or simply too absorbed to stop and think about it).
Wait what did you build?
Re: 3D printed mirror array
#98Re: 3D printed mirror array
#99This idea will have many unexpected applications. For example difficult to remove signs projected to flat surfaces.
An application close to this idea: IKEA arrow signs projected on the floor. They need no painting, floor needs no protection or treatment and they won’t disappear until the light is off.
You can do that just with a mirror in the shape of an arrow. Or a mirror with a negative arrow painted on it :)
Re: 3D printed mirror array
#100Earlier quoted context omitted.
Seriously, can it get much better than this?
It should be possible to do animation driven by the movement of the sun in the sky.
Similar to a digital sundial https://en.wikipedia.org/wiki/Digital_sundial