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Отличное наглядное пособие такие надо в школах показывать👍

Good project. You were crazy enough to assemble it together 😂 Thx for sharing!

I don't know why but that solenoid sounds and light flicking on wall is weirdly calming... For first few minutes at least 😅

Vidim da piše "Ogledalo" to ne može biti slučajno! :)

This design is really cool reminds me of the Nikodama Blinking Eyeballs. That toy used a solenoid to move two half circles to make them "blink". I have clip of an eyeball in my videos (shorts). I was testing how to drive them in a percussion project, not sure I can link to it in YT comments. I would donate a pair if someone could reverse engineer them. If you wanted to keep it simple I have found that Surplus Sales of Nebraska has 24v Deltro Armature Relays for $2.00 ea. )They don't have any armatures attached but have the hardware, making them ripe for mounting something like a mirror on them. Big question is if the 1/32" travel will work to move the mirror? Thanks for taking the time to share and listen.

do nano scale

You could improve the On Position alignment by adding adjustable stops on two the two corners that move inward when you want it to reflect. This could be as simple as two threaded/threadable holes you can put grub screws in. You really need 3 stops to fully tune the mirrors, but I think it would be easier to redesign the mirror cell than to add a third stop to this design. One alternate design that would help is to have the mirrors push out to turn off, and have the pivot as far to one edge as you can get it. Then you can float the pivot axle on some adjustable blocks and have a stop the solenoid pulls the mirror against in the on position. It would help the power consumption broadly if you had bi-stable solenoids so power is only consumed to cause a flip. Flip dot displays do this using a magnetic memory thing I don't remember well, but also flip dot displays are not suitable to being aligned, given their axis is through the middle of the flag's center of area. The mirrors also have a lot more mass than the flags so I'm not sure the lingering magnetic field will be strong enough to hold them up or out. One basic bistable solenoid design would be to have a magnet on the shaft and another magnet in the unstable center position, with their polarities set to repel. The moving magnet will be repelled away from the center position, as long as the solenoid can push or pull it across it will remain on that side until acted upon. I think you could retrofit the solenoids you have to include this functionality, with a 3D printed center-magnet holder, and a magnet glued to the end of back end of the shaft. Finding magnets of the appropriate strength, at an approachable price, will likely be the hardest part. Truly unfortunate how often sourcing parts is the hard part of a project

I Tried to make a similar installation for a theatre decor, ended up with 50 20 cm by 20 cm mirrors, every 5 mirrors were mounted on vertical axis, controlled by one servo. than you have 10 rows of this. eventually I programmed and controlled them in micro-bit a with a coding tool for 8 year olds. i can send you a video if you want to use it as inspiration, although it is not as sophisticated as your mini prototype. but the scale of the installation was quite nice.

flippin awesome

:) Make (half) disco ball.. Should it rotate or not.. Hmm...

Man I love the sound of that thing. Awesome build!

Bowling lanes are another example of the lengths americans go to to avoid using SI units.

Now do bad apple!

This is really cool missed this one!

"Four bowling lanes" Let me guess: You are from the USA!

finally a video for me!

This video deserves mid-rolls, you deserve to be paid by RUclips properly, get on that filming grind and get us a 12-14min video man! Great stuff

I think I could fall asleep to the sound of flipping mirrors. There's something really relaxing about this

huh. that was kinda cool.

I think any lense like a magnifying glass would work to project an image of the array on the wall. Super cool project and inspiring thanks for sharing :)

use surface mirror! generally mirror coating is done on back of mirror! back coating mirror add refraction to reflection!

So cool man. New subscriber ✌🏻

CDeez nuts

What is sodder?

The solenoid patterns frequently sound "musical"...nice job.

Looks like Barbarella's computer.

The method to reduce the current draw of the solenoids is to power them through parallel RC network. This is the classic trick that has been used for ages when driving relays. See, a solenoid needs high current only to initially overcome a static friction force. A hold current is typically much less. So what you need to do is to determine which current is sufficient to hold a mirror. You can do it, for example, by connecting it to your lab PSU and gradually reducing voltage/current until the solenoid releases. Then add some 15% to the threshold current and calculate the resistor taking into account the resistance of the solenoid coil itself. Determining the value of the needed capacitor takes some experimentation.

Make a bigger one and play Tetris on it 😁

Isn’t the purpose of this idea to have a reflection change? Also it would have been better to use coils on a board, and use magnetic mirrors which slightly deflect when the coil is energized.

Stop the Music.

Impressive technique.

Does this have any real practical purpose other than just being a relatively expensive toy?

You can lower the relay current by using PWM. 100% for pull-in, 50% for holding. Or you can have a resistor in series with the coil that has equal resiatance to the coil, have the resistor bypassed by a capacitor so that the time constant of the RC allows for reliable pull-in. Both methods lower the current by half. You can also use a zener in series with the back EMF diode to cut down the release time by around half. Its voltage should be the same as the coil voltage, or two times that for even faster release.

That's pretty cool.Too bad it's such a colossal (and expensive) job to scale it up.

Control each mirror individually or work with columns and rows? You could switch the rows to plus, work with diodes and coils and switch the columns to minus. Then you have a matrix and because the coils are pulsed they consume less power. A diode in opposite parallel to the coil means that it switches off more slowly.

Awesome ❣️

Thats so good i like electronics prohects like that

you only need high current initially, once the solenoid hits the end stop, you can use PWM with a low pass reduce total used current

I wonder if a flip dot display could be repurposed to make a lower current draw version that’s more easily scalable?

I work for Texas Instruments. My first 8 years working in the DMD fab.

The musical tempo is rough, having to move fingers inches to strike a note at a precise time makes this happen. A palm rest so fingers not hands move might help. Mostly though zero tactical feedback makes these "harps" hard to play. Having the sides to play works in an accordion because you can rest fingers on the buttons without having to see them. Purdue did some experiments with gloves and feedback devices in the fingertips for a laser harp. Still you can't rest on a string and pluck in time.

Creative project! Wondering if any custom PCBs, or 3D printed parts may help for any upcoming projects? Would love to sponsor free services and reach any collab together! (PCBWay zoey)

Very nice project. I have a question.Have you thought about how to solve the problem of high current flow in the circuit?

Very captivating movement and sound. I wonder what can be done to make the current draw less. Maybe some kind of pneumatic mechanism or with strings, where you only actuate tiny valves. You can also twist permanent magnets like they do on the noga dials. With some mechanical advantage you can make the mechanism very tiny.

amazing project !

Nice, I love the sound it makes.

That's really awesome! Is it possible to calibrate the mirror position in reverse? i.e. lay out the mirrors on a flat surface like glass and then glue them to the otherwise fully assembled frame in one go so they dry laying flat in the solenoids' resting position

This is some transformer's stuff level! Pretty dope!

Great project! Looks like it could be improved a bit by using first-surface mirrors, those that have reflective layer on the outside.

About how much Kb were you able to store on the different sized discs? I'm looking for a creative way to reboot an old atari 2600 using a cd cut out of wood would be unique.