Making a d10 spinner

I thought about dice a bit too much and this is what happened.

[@HillHand]

The sound truly is delightful. I want that to be THE sound effect for "some sort of RNG is happening".

[@CadetSF]

The final build looks like something out of a Cyan Worlds game that would be a little in universe flavor to learn the numbers of a fictional written language.

[@Brok3nC4rrot]

Good timing too, the Riven remake is out today

[@negroniusblaximus7420]

​@@Brok3nC4rrotbased vr mode

[@Manimanocas]

I really want to try those games

[@IIAOPSW]

Since you just want random numbers and don't care about them being arranged sequentially in the spinner, you can overlap the positions and reuse magnets from the previous position for the next one. EG 2,3,5,6 and 8 all have three horizontal segments so you can get away with just one set of magnets to flip them on for half the wheel and then another set to flip them (as needed) in the other half of the wheel. You can also take advantage of the fact that the top half of the vertical segments are the same in 2/3 and in 5/6 whereas the bottoms are the same for 3/5 and 6/8. Meaning you just need to encode which bits to flip, not the whole state of the display per position. And, by just encoding the flips not the full data, you can cut down drastically on the space needed in the wheel.

[@shotguntornado]

I like this line of thinking, but I can't help but think that there would be some inevitable failure in the magnets flipping every node every time, at least when the disc is spinning fast. The one nice thing about parking the display over a full array for every number is that every node lands on a magnet that ensures it reads correctly. And having the same number of magnets on every number also helps balance the weight and spinning speed to reduce bias. I would think since magnets determine where the wheel stops, having more or fewer on different numbers could make them more or less likely to appear. I could be completely wrong though.

[@concray]

@@shotguntornado if you have a reset field (all on/all of) maybe it could be enough. Because in the end you only care about the correct flips once it slows down. And you should already have the bias in the wheel as it is. The one that has only "repellors" should be more unlikely than one that has only attractors or do the displays not work like that?

[@Chocomint_Queen]

Won't that mean it only works in one direction, though? Since a magnet doesn't "flip" a bit, it's specifically writing a 0 or 1. If you set it so going from 6 to 8 just entails activating the top-right pair, then going from 8 to 6 will only keep them on.

[@SollowP]

Neat idea but the end result would just be the display showing an 8 since the magnets would pass over and flip things which weren't supposed to flip.

[@shotguntornado]

@@SollowP I didn't even consider that, yeah you can't just choose to flip a left or right side. You can't flip a 3 into a 5 without it becoming a 9 for example.

[@DimitriSokolyuk]

Actually, if you cover the disk with thin aluminum sheet, so individual magnets are no longer visible, it will be even more satisfying and "mysterious".

[@NandR]

The aluminum may act like a brake though. While it isn’t ferrous it is metal and responds to moving magnetic fields.

[@electrifyingvids3545]

​@@NandRIt wouldn't be a breaking effect though, as no eddy currents would be generated as the magnets would be spinning with the aluminum.

[@joey_f4ke238]

@@electrifyingvids3545 There are magnets on the display though...

[@electrifyingvids3545]

@@joey_f4ke238 Perhaps they could switch to silver plated plastic? The silver would provide negligible eddy currents.

[@SierraGolfNiner]

This was a ton of fun to play with at OpenSauce. I will not admit how much time I spent spinning the dial or just admiring the simplicity.

[@BlackSoap361]

I like that it shows non-numbers between valid outputs. That’s a feature, not a bug.

[@DaggerStyle]

This video really reminds me of a classic 2010 KZbin video. And I mean that as a most sincere compliment! Thank you for showing up in my feed!

[@907npak]

I'm glad I randomly landed on this video, particularly on this day.

[@MrYerak5]

I randomly missed a day

[@redapplefour6223]

i love dice and dice adjacent peripherals but my favorite part was drilling into that magnet. would not have thought it would look like that

[@m1geo]

I wonder if there was a termite reaction going on? Iron and aluminium burning?

[@dogsarebest7107]

@@m1geo Probably just straight up burning. It's a cermet, there isn't any aluminum metal in the magnets. That wouldn't work since they're sintered! It's just straight up burning, for a thermite reaction you need an oxidized metal and a metal that wants to pull the oxygen. Rust (iron oxide) + aluminum = pure iron + aluminum oxide + heat. There is no oxidized metal in a neo magnet, so it can't be a thermite reaction. That means it's just straight up metal fire :) I mean there is a tiny amount of aluminum used probably as a flow modulator and plasticity enhancer during the pressing, that just kinda does nothing after sintering, but you aren't getting a thermite reaction with .2% aluminum. It's just normal combustion oxidizing all the metals

[@vinny142]

@@dogsarebest7107 "Probably just straight up burning." Well, it's glowing. The drill bit would melt long before reaching the temperatures required to ignite the metals in the magnet.

[@dogsarebest7107]

@@vinny142 No, definitely not. That's a tungsten carbide endmill. They happily turn steel into burning shards, happily turn titanium into raging fires, what makes you think it won't do it for this? It has to do with PHYSICS. Small particle size means LOW THERMAL MASS and HIGH SURFACE AREA. That means it burns REAL EASY. Why do you think microscopic powder generated is HARDER to ignite, than a solid chunk of tungsten that weighs several ounces? Even ignoring the fact that one particle igniting, generates heat that then raises the temperature of adjacent particles to either very near, or above the autoignition temperature. That's how exothermic reactions are defined. Have you seen any machining videos? Never seen a spark happen? Never see ribbons of metal burn? Touch a 9v battery to steel wool and think about it Static electricity can happily ignite aluminum powder or titanium powder, but the spark doesn't vaporize your finger. Because.. physics.

[@itmus_a9270]

9:39 you just released the little magnetism demon trapped in the magnet

[@Pheonix1328]

So that's how magnets work!

[@MicrowaveJak]

This is an incredible project. I have a deep affection for those mechanical flip displays, machined metal, and random number generation. Really a perfect storm for me. Thank you for your fantastic content

[@protheu5]

Even watching this thing spin is satisfying, can't imagine how extremely delightful it is to spin it in real life.

[@SollowP]

Just as you said "Happy RNG day" I thought to myself "I hope the date is different every year" and you didn't disappoint.

[@AJBlue98]

Instead of bending steel bars to get your magnets into a linear configuration, I recommend trying lengths of coaxial cable, which should be shielded well enough to prevent that crosstalk you ran into. By the way, first-time viewer here - great video!

[@Unmannedair]

Coaxial cable will not transmit magnetic flux... Not static flux anyway. Your idea about shielding is correct but coaxial cannot shield against a magnetic field. Coax only shields against induced magnetic fields and that's a dynamic situation only.

[@jasonudall8614]

For magnetis screening..Mu metal is your thing ( mu pronounced moo )

[@GlutenEruption]

@@jasonudall8614 that's exactly what I was going to comment

[@emi9643]

this got me thinking about how cool it would be to have a revolver where the cylinder has the magnets around the outer circumference, and have the display mounted on the top. would be fun to play a western style game, pull out your revolver, give it a spin and have the 'roll' shown to you. add a little flair to your roleplay. especially so if your rolling D6s for damage since many revolvers are 6 bullet capacity so it would really be fitting

[@YouTube_username.]

Fascinating idea and of course the numbers arranged appropriately will count down remaining ammo

[@harry1010]

You’ve hit it out of the park with your explanation, no, story telling about statistics. It’s honestly a delight to watch.

[@Lilac757]

Thank you for the quality closed captions. They are greatly appreciated.

[@user-px1wj2uv3r]

I love projects like this. They start with just a question or curiosity and then morph and materialize out of thin air. No one asked for this specific thing. Not even you. And yet, now it exists, and it's AWESOME. Love it.

[@Zer0ji]

Nice build! Regarding the cylinder + magnet channels idea, at 04:25 you could tilt the display about 18° clockwise (or 12° CCW) to have the Y positions of each magnet be somewhat equally spaced, and it might be possible to design a cylinder where the 7 magnets for a given digit are not in a straight line, but in a weird pattern that matches the exact position of the display. It's a bit difficult to explain but I can sketch something if you'd like :) smaller magnets in the cylinder would probably be required (and a ton of magnets if you want a d100)

[@solarbirdyz]

The Kessler Syndrome being perhaps not as unfun as you'd hoped is a pretty great turn of phrase. xD

[@bernardandrys2397]

Where are more details of the game? I checked Mastedon and only saw a few screenshots.

[@ElectroBotVideo]

@@bernardandrys2397 Would be cool to see gameplay of this and even better if it were released on Steam.

[@InOtherNews1]

Just a minor nitpick: chi-squared is usually pronounced by mathematicians with a hard "k" sound (for the greek letter chi), not a "ch" sound. Great video!

[@user-bk3pl8bn7e]

to be fair I started at lapidary, cutting open geodes and agate, a wee touch on jewellery making and then the algorithm decided it was dice so I had people carving dice on diamond wheels casting them, all sorts. even just some showing off dice. now the algorithm has brought me back to machining just with more dice. cool video dude.

[@vasilesorin6377]

the thing I like about your channel is that you just do what you think is intresting and fun without worrying that it may not perform the best on youtube or other stuff like that

[@coastmountainkid]

Ack I'm sorry I missed your booth at Open Sauce. Hope you had a great time. I think this project is very understated in terms of all the cool design decisions involved in creating the spinner. Keep making cool stuff!!

[@1RandomToaster]

Regular and coherent are so boring, I’m here for that drip-feed of neat passion projects to distract me from my pile of incomplete passion projects 😂

[@ristopaasivirta9770]

Really cool project. Your last video about the map/clock and this one were such pleasure to watch. I like that you don't hesitate to get in to the details without getting stuck to any particular step for too long. Subscribed!

[@Umberflare]

It sounds like a rattlesnake. The sound of "you're in danger!" Perfect for an RNG scenario 😅

[@Atlessa]

It bugs me so much that you placed the numbers in order (0, 1, 2 and so on) rather than have opposite sides of the disc add up to 11 like they do on a dice. But DAMN that sound is satisfying! :D

[@wyw876]

I'm wondering if the total forces involved in the number of segments being flipped per digit transition is affecting the randomness distribution...

[@heatshield]

@@wyw876 that might be worth working out although you would also have to consider the rest of the set passing by. That would make it considerably more complex to figure out. Assume we’re spinning clockwise. The right side pair of magnets on the disk first approaches the left side segments, then reaches the correct ones on the right side. The left side magnets are at their left side segments but then continue past the right side segments as they leave.

[@playgroundchooser]

​@heatshield would magnetic eddy currents cancel that out, or introduce even more randomness? 🤔

[@SparrowHawk183]

Here from Hackaday, awesome project! As a designer/fabricator/Dimension 20 fan/DM, this project tickles me on so many levels!

[@lilbacon7777]

I love the sound of it SO. MUCH. Glad I found you through your Geochron video!

[@HoZKiNZ]

The way your story parallels what became of music, from tubes to flat sheets, quite interesting. Nice design, GG!

[@Monkeyb00y]

First video of yours I've had the pleasure to see. Concise, fun, and entertaining. Very nice work. Randomly recommended 4 days later. Cheers indeed.

[@phantomfluffy]

That spinner is awesome. It looks like something from a star trek casino!

[@wholesomejm]

Your videos are very enjoyable. I love your curious, hands on character. You share your thought process well!

[@dirktermagant5629]

I have a bunch of tiny neodymium magnets from an abandoned project. I wonder if I can make my own flipdot modules. To the workbench!

[@LightbringerDesigns]

I love it! I have a thought for how to make it easier to remove inverted magnets: first drill through-holes at all the right index positions, between half to 3/4 of the clearance hole diameter. Then have a drill press with the clearance hole bit & a depth stop. The larger bit should naturally center on the pilot holes well enough; start with a depth too shallow & "sneak up to" the depth where the magnets are flush to the surface. Now if a magnet is backwards, you should be able to knock it out with a punch from the back side pretty easily, especially with a glue that takes 24 hours for "full cure." I'm a mechanical engineer with above-average manual machine shop experience 😉

[@TheRedBird]

I saw you at open sauce 2024, saw this project and soo happy to a found your youtube channel ! keep it up man

[@theofficialczex1708]

Great video! If you want to ream a hole oversized with a nominal reamer, you can shove a greased-up paper towel wad into the hole. You'll manage to oversize it by about 1.5 thou. If you need a little less slip, if you run it at a higher RPM and feed more slowly, you can shave off a bit less. As with drill bits, you'd be surprised how a reamer can be manipulated!

[@AnthonyFrancisJones]

Excellent! Great to see these original idea build projects, and as I find too, if it has not been done before you make lots of mistakes but persistence gets you there in the end and results in a very pleasing artefact!

[@ReedCBowman]

This was the first thing I stopped and spent some time grooving over at Open Sauce! Great to get a whole video on it. I would love to see this level of detail on your marvelous kinetic sculpture you had out front.

[@AdamCooperman]

I have been collecting non-traditional dice lately and I'm absolutely in love with this. I love how clearly it communicates everything about how it works without sacrificing any other design to do so. I hope my collection includes something like this one day.

[@Tracequaza]

damn this title undersells how cool and interesting your project is. i'm glad I subscribed from your geochron video!

[@Slampiece1]

Your channel is so enjoyable to watch. The ease you talk about things in such a knowledgeable way is really incredible. I wish you all the followers in the world please keep doing what you’re doing

[@jasontermini8487]

I saw your booth at Open Sauce! really cool stuff you have. I didn't know how much time and effort went into such a seemingly simple device.

[@vandahm]

This is outstanding work. I love those old mechanical displays, and I can almost feel the kinetic and tactile satisfaction of spinning that wheel just from watching the video. I told myself a while ago that I can't sub to any more KZbin channels, but I'm going to have to sub to one more, because I am so very interested to see what you make next.

[@smeeself]

I'm hooked. I subscribed on a whim after seeing one of your videos. I'm not disappointed. Thanks.

[@davecgriffith]

Super interesting build! Love the sounds it makes.

[@AnnLiesArtist]

Ah, I love that feeling when I find a new niche channel to follow. This is delightful, I want to try my hand at a version of this when I have the time for in-person games again. This would be great for a “Box of Doom” style roller for the table!

[@undersky596]

Damn i love this project! Subscribed, really need to know more about that cabinet. Keep going! Thanks for sharing

[@stefanolassandro886]

This project came out so good! Amazing ❤

[@WingofTech]

You are very cool. I just wanted to give that affirmation, love your project!! :)

[@shayes.x]

No regular release schedule? No consistent channel theme? Absolutely perfect.

[@thebestmaidens]

I am so happy to have happened to upon this channel! I can't wait to see what random project you do next!

[@Warhawk76]

I absolutely LOVE this project!! It looks and sounds so damn cool.

[@adhawk5632]

I always learn something from you channel. Love it mate👍👌🇦🇺

[@Draciel360]

Just as I had the thought 'oh I bet that sounds great when it spins' you got to the sound test. Just a lovely project overall, great work and great video man!

[@peterweller8583]

Kudos maker, solving problems no one else thought of. I am in awe!

[@Packbat]

That is such a cool build! Thank you for sharing this!

[@tom_kauf]

Great video! It was cool meeting you at Open Sauce. Keep up the great work!

[@ChrisConnett]

Those cardboard dice were awesome! They reminded me of similar things I resorted to as a kid. (The rest of the build was awesome, too, but I had to comment for the nostalgia hit.)

[@Unmannedair]

You can still do press fit magnets in a drilled hole, but you can't use pressure. It's counterintuitive but if you chill the metal the hole will get larger not smaller. If you chill the metal sufficiently it's effectively and largening the whole big enough to accept the magnet without any serious force and then the magnet gets clamped when the metal warms back up to room temperature. Chilling also doesn't damage the magnets that way. You might be able to use dry ice to chill it, but I'm more effective mix might be liquid propane.

[@learnmyname123]

This is super satisfying to watch. A percentile version would only need one more row above/beside the current display. 2 independent spinning discs, an inside and an outside disc. I don't know how to make it so you could spin either of them independently of each other, but it could be fun watch8ing you try haha.

[@MichaelSteeves]

Tom Scott brought me here. Content kept me here!

[@LiftPizzas]

I also made dice out of cardstock, back in the 80s. I couldn't find a d30 so I had to experiment with many shapes until I ran across the correct angles for a diamond face. If you use tape on the inside they work well. Use a toothpick ftom the corners to get the last few faces.

[@peraltarockets]

It was lovely to meet y'all at Open Sauce, and get to try the spinner in-person. It's lovely.

[@outbakjak]

This is so cool!! We need to figure out how to make this type of system roll multiple die at once. Great work

[@jfdd43]

Looks great! Just a thought, if you do a multiple dice version, you don’t need every combination shown. You just need to show the total, and have it have the same likely hood of showing up. For example, if you do a 2d6 version, you can have a 7 show up, and weight the week to give it a 1/6 chance of appearing

[@lll9140]

This video has really nice pacing, good cinematography, and quality editing. I like the dual narrator to break up sections.

[@OutlawAlaska]

Love the videos when they come out! Small channels producing such interesting content is rare on KZbin these days

[@Malphazar]

Hey Hey! Glad to meet you at Opensauce, I was the big guy helping with Cody's Suit booth. Hope to see ya next year

[@Waggles1123]

It'd take a bigger disc, but you could do a D20 if you compromised in using A-J (with a weird g) for 11-20. Or, a single flip dot for +10 (eg. dot-3 is 13, while no-dot-4 is just 4). You'd still need a big wheel for it though.

[@nathanskinner423]

This thing was sooooo coool! I saw you and talked to you at open sauce. I was the guy with a black backpack and a Univeristy of washington hat. Keep us in the loop on your progress with the drum.

[@davecgriffith]

Nice! Been looking forward to this since the teaser short! Can't wait for lunch time :-)

[@joehopfield]

The look ended up perfect. The sound is fantastic.

[@ericchild8845]

The project was interesting enough to keep me watching and your delivery of the journey convinced me I should subscribe just to see what other kinda cool and neat stuff you come up with. Cheers from a fellow semi pro, ok honestly I should say terribly average or high functioning amateur, maker. 🤘🏻

[@lowkeyblessed]

This was a great video and at the end I was shocked to see that there's less than a thousand views, I was expecting hundreds of thousands or millions Keep this content going and you only be going up!

[@AlbertFilice]

I've had success using a spring center punch to shatter magnets in the holes then a pick to get them out. Also CA glue uncuring agent helps

[@WeeIrishLaddie1]

This thing was awesome and really fun to play with at opensauce. Thank you for making it and bringing it!

[@lasskinn474]

two 10 sided dices are way underrated for tabletop rpg's. you can scale most other dice combos to be presented by the 100 easy enough close enough and once in that it's easy to understand the probabilities involved as a novice player and you don't need a bunch of different sorts of dice to play.

[@nedanother9382]

Enthusiastic thumbs up for a tradition that dates back to "almost 2018" lmao

[@Unmannedair]

Bending rods into a linear array could actually still work, what you need to do is put an antiparamagnetic material in between the rods to increase the barrier separation for the flux. Without doing any serious research and off the top of my head I would recommend pyrolytic carbon sheets between the steel rods. It would increase the amount of potential that the flux would have to traverse in order to tunnel from one rod to the next. It should give you much more granular control over the rods while still having them much closer together. It's basically the magnetic version of electrical insulation

[@quintinflower1317]

Was really cool to see this at Open Sauce. Very satisfying to spin.

[@MobCat_]

I think when you heated the metal with a gas torch you took it past the curie point which messed with its magnetic affects. You want a nice ordered line of iron atoms, and now there kinda all over the place, not passing the affect down the rod, it just goes out the side or wherever.

[@RoamingAdhocrat]

is there a way to restore it? like, magnetising the metal while it's red-hot and cooling?

[@jsax01001010]

The iron rods weren't magnets themselves. They were just supposed to "conduct" or guide the magnetic fields from the neodymium magnets. Once they cooled back below the curie point, they would be able to do that as they'd be attracted to the magnets again. I think the problem was that the magnetic field needs a return path, and without one provided, it would follow the adjacent rods back inadvertently flipping other segments.

[@cyanyeti1556]

That's awesome, the sound is perfect

[@greyw0lv]

random nerd makes a cool toy. I love these weird kinds of design videos. Keep up the great work man!

[@icecreamtruckog3667]

Aluminium is actually magnetic and provides magnetic resistance do to the metal being conductive and making eddy currents inside the metal. Or if a magnet moves close to the metal it makes eddy currents that have a 90° angle to the magnet and that in turn makes a magnetic field that is 180° to the original magnet.

[@maremantis444]

i don't understand any of this, i hate physics but it's been so lovely watching someone do these things passionately ,, it's really granting as it is special to you, seeing people do the things they love is precious

[@AsyncMusic]

I think another device that would be really cool and use the same type of display could be a microcontrolled version that just pulls a rand out and cycles through numbers till the nth rand, physically switching the display each time. It would be a digital way to recreate that effect, and I think its a cool project idea I might jump into at some point!

[@smellsofbikes]

I particularly love your childhood paper dice. But the flipdot is fantastic, of course.

[@kaleygoode1681]

Awesome, I'd been having similar ideas for a while - glad somebody else did all the work for me😅 It needs a trigger - based on the friction push-along you car mechanism (slot for one axle hole)! With some mechanical force randomisation🤔 (I'm great at creating work for people) 🤭

[@dosgos]

Looking forward to the drum system. You could also try some automotive rubber belt to reduce the depth, at the expense of height. Or at the extreme a slab that moves up and down. So many silly options!

[@GusCraft460]

Here’s a space saving idea: italics. That’s right, put them diagonally to reduce their vertical footprint.

[@PhysicsGamer]

I love, love, _love_ these display modules. I kind of wish I could just throw them into every project I do with numeric output that doesn't need to be readable in the dark. Pity they're a bit much for that... I wonder if it's an economy of scale problem?

[@yorgle]

This is beautiful! Love it!

[@mists_of_time]

amazing design, I love it

[@m0eser]

I kind of imagine the spinning cylinder to look like the spinning pillars scene in The Golden Child movie. "I-I-uh-I-uh-I-uh-I-uh want a random numberrrrrr"

[@robzyb]

Absolutely love the project! And I hate to be the insufferable "that guy" but a p-value of 0.91 doesn't mean "a 91% chance its fair." A p-value of 91% means that if we assume the d10 is fair, there's a 91% chance of obtaining a distribution as reasonable as the one you obtained. Therefore you could say "this isn't a crazy distribution to get from a fair d10, so I can't disprove the possibility that it's a fair d10." If you had a p-value of 1% then the correct statement would be "if this was a fair d10 there's a very low chance that I would've observed this crazy distribution, therefore I doubt this is a fair d10."

[@Frrk]

Saw this one in an Open Sauce video, great build!

[@Vixyish]

Oh wow, whose video did you see it in?

[@Frrk]

@@Vixyish This guy! kzbin.info/www/bejne/b3uxg6uteLJkkMksi=qPCMdcCj2fK_uxXy Edit: at 9:53

[@girlflash]

What a wonderful project and video! (despite the pentagonal trapezohedra slander :P)

[@MstrPoptart]

Stopped by at opensause, didn't recognize you then but I actually have seen a few of your videos, Also now I'm upset I didn't spend more time at your Astroids cabinet. The concept sounds funny and I thought it was just normal asteroids lol