HOVERBOARD TEST! (PART 2/2)

We're about to do our fourth hover test, hopefully  this time it actually works three, two, one... That was hovering! This video is sponsored by KiwiCo, the best  way to learn how to make things right at home. Let me tell you something there's a reason that we're five years behind Back  to the Future 2, in the creation of hoverboards. It's freaking hard. In fact, a few years ago a team of students  at Full Sail University tried with me   but with only a two week time  window it didn't quite work. So you guys remember Jimmy Because of science He's the co-op that we hired  to make me a hoverboard. In part one of the series Jimmy  took us through all the theory of   how a hoverboard should work. Developing  that theory alone took several months,   he then built all the components  to bring that theory to reality. But the thing is nothing ever  exactly goes according to plan. Everything can look good on paper but  until you test it out for the first time   you never really know. Jimmy had a hard deadline to finish  the hoverboard because the video was   supposed to come out on December 10th  and his co-op term was almost over, so jimmy put everything together  and we thought we were good to go. Then the problem started. We  couldn't get all eight motors   running simultaneously and we didn't know why. But Jimmy had a deadline so he persevered  he stayed late, he worked on weekends,   and he drank more red bull than a frat house  on spring break...and he got it working! So it's time for the very first test what  he'd been working towards his entire co-op. Bad speed controller. All it takes is one bad apple as they say, so we had to order new speed controllers which  doesn't work well for the impending deadline. Generally we want to make  sure everything design-wise   is finalized before moving on to aesthetics. But we don't really have that luxury right now   so Jimmy is actually over at  Twin City Graphics right now working on assembling the board at  the same time it's being wrapped. Let's hope that speed controller comes in time. How's it going Jimmy? Pretty good man! Board's coming together  well, Mike is killing it over there and I guess I'm doing okay. My new speed controls are here, the board  is wrapped, and partially assembled, let's get the rest of this thing together! As stated before, we're going  to be using 8 magnet wheels. Each magnet wheel will have its own dedicated ESC. A magnet wheel will draw around  200 amps at about 50 volts,   that's about 80 kilowatts of  power from all eight wheels. That's the equivalent of about four light  sabers, four Colin First drift strikes, or about three times the power the  actual shop can draw from the grid. Gens ACE hooked us up with these batteries  to make this thing actually work.   If you haven't heard of Gens ACE they make  some of the best batteries in the world and it's how we power most of our creations. We've separated.. So, we've separated each corner of the hoverboard  such that if an ESC fails and it blows up it won't damage any of the  other ESC's in the chain. Eight and six are on one power system  and seven and five are on another. To actually communicate with  the ESC's and control them we'll be using this wireless  receiver and controller. The wireless receiver and Arduino combo will   send a PWM signal to act as a  throttle input to all the ESCs. In other words if I pull the  trigger we're going to be hovering! Everything checks out! Just one test left to do. Let's see if it hovers! Alright so I haven't really done  much on this project so uh they've   elected that I get to hold it when it  turns on in case something goes wrong. Jimmy what happened? I don't know. I replaced all  the ESC's they're all brand new   worked perfectly fine on the bench test  so I guess I'm working late tonight We always get asked how to  get started with engineering? Which is why we're super excited  to partner with KiwiCo again   and give you guys 50% off  your first monthly crate. KiwiCo wants kids to have the creative confidence  to tackle problems with no one right answer   helping them become fearless innovators to not  just make a project but to make a difference too. They create these super cool hands-on projects  and toys designed to expose kids of all ages   the concepts of steam, science,  technology, engineering, art, and math. Each box just like this one  includes all the supplies needed. Fantastic instructions and an educational  magazine to promote further learning. With eight subscription lines you'll be  able to find the right crate for your   kids age and abilities putting them on the  path to becoming a Hacksmith just like me! I might not have any kids myself but after  building a few of these crates myself   I can't think of a better way to  teach others how to make things. I guarantee you'll definitely have  some "whoa awesome" moments with   these crates leading to even bigger  "whoa awesome" discoveries tomorrow. Check out kiwico.com/hacksmith50 for  50% off your first crate...any crate! Just click the link in the description below and  you'll be helping support the channel as well. Any luck Jimmy? Oh Darryl, Darryl I got it figured out man!  It's the ESC on startup okay let me  explain let me explain it's really simple. Look here this is the amount of drag  the wheels encounter at the startup okay   the closer these wheels are to the  ground the more resistance they face   okay so there's drag that's a big amount of drag. You see that? Analogy here maybe I  know you're a little bit slow so I   got something to explain for you a car  on a hill the car the bigger the angle   the more power you need! Now our ESC's  they're only rated for 190 amps obviously   the more resistance they encounter  the more current they need to pump out and as soon as they start up because that  big drag bruh the easiest they go boom bruh! It's simple right? Just make  sure it doesn't go 190 amps. I gotta make sure this works...I need a test. This test rig is set up with the same air gap  between the wheel and the floor as the hoverboard.   We've connected an oscilloscope  to an ESC and throttle input. This will allow us to record the current  draw and the throttle during a ramp up The ESC can only handle about 190 amp bursts   so basically we need to make sure that  the threshold is at or below that. I've got this old 80s style watch  kind of looks Back to the Future-esque   I'm going to be using this to record the  amount of time it takes to reach 100% throttle. To sum it up we need the throttle  input to reach 2 milliseconds which   is the equivalent of 100% throttle  and the current can't spike over   190 amps the watch will tell us  how long it takes to do that. Time to test it out. To get our wheels to 100% throttle without  exceeding 190 amps it took us 8 seconds. On our hoverboard the ESC's are what  control the motor and I can program   them to take 8 seconds to ramp up  to 100% throttle...problem solved! But before I implement this on the board I really  want to make sure this is actually accurate. I don't have that many ESC's left so I'm  going to be testing this a bunch more times. After a thousand tests it's safe to say that  an 8 second ramp up is accurate for a board. Let's program it in. We're about to do our fourth hover test hopefully  this time actually works three, two, one... Holy crap! That was hovering did you see how high  it was yeah honestly a massive relief! I've put a lot of hours into this project more so  than I'd like to admit and just seeing that hover   honestly just makes me really happy. It's a little bit off-balance but I think once  we get some weight on top it'll be pretty stable. Three, two, one... Okay three two one tucks it's  warping the plates so bad that's probably 60-70 degrees dude  look at the plate it's warping so bad. That was a great success once soon as we  put on the sandbags it was a lot stable   a lot more stable rather, than the  first test the eighth inch aluminum   plate that we used got so hot from the  eddy currents it actually started to warp. This is basically a 10 kilowatt  induction stove let me demonstrate. All this heat caused thermal expansion which  is why the plate warped during the test.   We're gonna need to buy a thicker plate  to help distribute the heat better. Time to buy a new floor! WOOO! Jimmy what are you doing?!  You're testing it without me?! WOOO! I didn't fall! I feel like one of the kids  in Ms. Frizzle's class in The Magic School Bus when they erase like  friction they're like "have fun kids!" All right that was freaking awesome! We made  our very own hoverboard and it actually works! It was a ton of fun riding it pretty difficult considering  it's kind of like riding   a skateboard with no friction  which is kind of a challenge. Reminding me that episode Magic School Bus  back in the day when the kids got to play in   the gymnasium with no friction on the floor it was  definitely an experience but fantastic job Jimmy   building a hoverboard is no short  order. I'm pretty sure it's been the   most expensive project this year too and we've  definitely run into a fair share of problems but   you figured them out we got it working and  we did it by the end of 2020 so awesome work! In recognition for your  overuse of company resources   for the Back to the Future hoverboard  we are reluctant to present Jimmy   with the most expensive project of the year  award in the Science and Technology division.

Channel: Hacksmith Industries

Views: 8,629,051

Rating: 4.924087 out of 5

Keywords: thehacksmith, hacksmith, back to the future, marty, doc, doc brown, hoverboard, future, delorean, time machine, hovering, magnets, science, make it real, real working hoverboard, magnetic, eddy currents, engineering, engineer, stem, experiment, workshop, build, electronics, battery, michael j fox, metal, mechanical, inventor, creating, time travel, self lacing shoes, hover board, board, back to the future board, scientist, batteries, wires, ESC, wrapping, vinyl, hot pink, floating, magnet wheel, wheels

Id: Dqe7Iw2MiZ8

Length: 14min 2sec (842 seconds)

Published: Thu Jan 07 2021