@@MaxMakerChannel edu puertas Did you connect the MS1, MS2, MS3 modes to the micro-step?Thank you!
@reecedarwin79563 жыл бұрын
i guess im asking the wrong place but does anybody know a method to log back into an Instagram account? I was stupid lost the password. I would love any assistance you can offer me.
@valentinochandler59393 жыл бұрын
@Reece Darwin Instablaster =)
@reecedarwin79563 жыл бұрын
@Valentino Chandler thanks for your reply. I got to the site through google and Im waiting for the hacking stuff now. Seems to take a while so I will get back to you later with my results.
@canofanger3 жыл бұрын
Good ideas in this video. A small tip for those who are new to machining; 1:28 very dangerous to hold a piece of metal when drilling. The bit can catch and spin the piece causing a bad cut. Better to clamp it instead.
@Bear-nu8xm5 жыл бұрын
Much smoother than what i can do by hand with my slider. I hooked up a hamster wheel to mine however, he needs practice on speed.
@kiranshashiny3 жыл бұрын
The thing I liked about your video is that you showed the failures and also told that it took 3- to 4 times to get it right. Most videos say projects can be done with ease. Yours was practical. Nice and liked it.
@jeremy29tunage5 жыл бұрын
Super easy. All you need is a motor, a tonne of electronics, hours of time, a 3d printer, resin, a drill, different drill bits, belt, pulley, soldering iron, solder, screws, and even more time to learn how to do it all. Great DIY but this is by no means an efficient/cheap option unless you happen to already have a shop readily available and a lot of patience haha
@SirSyao5 жыл бұрын
you can do it cheaper recycling an old printer , it has already a rail an step motor, the band and only need to buy an arduino
@MaxMakerChannel5 жыл бұрын
Good idea.
@Squaredot015 жыл бұрын
to his credit, the title does not include "easy".
@KWHCoaster5 жыл бұрын
@@SirSyao Hmmm, maybe that Panasonic KXP-1124 in the closet will have a new purpose after all.
@donepearce5 жыл бұрын
The idea of these videos is to show you the principles of how such things work. If you want one you can invest the time to learn how to do it. The exact details here are not important, and you should make what suits you. For example, I can see the advantage of using the Arduino's USB port to make the slide fully programmable with a PC app to programme the moves and provide true repeatability of shots. And of course the sort of person who will take this on is exactly the sort of person who has amassed the skills and tools to do it.
@ThisOldTony7 жыл бұрын
great idea and execution. enjoyed!
@MaxMakerChannel7 жыл бұрын
+This Old Tony What an honour!!! Ask Jimmy about the Ringmaster if you get the chance!
@TheMusicRecordingNetwork2 жыл бұрын
now this was so amazing. I am cleaning up my garage now to make something like this. But Making the black box that everything set in..... WOW
@TaliosLintry6 жыл бұрын
I don't see myself buying all those tools and 3d-printer to build a slider, but it was insightful and fun to watch. Good job!
@richclominson47747 жыл бұрын
Continue like this! The beginning is difficult, but I am sure you will get thousands of suscribers soon. You are awesome!
@MaxMakerChannel7 жыл бұрын
+Rich Clominson Thank you very much! That would be great! But it is already great to have the ones I do so far.
@MaxMakerChannel6 жыл бұрын
Thanks!
@sosteve91135 жыл бұрын
Nicely made
@Mike335is5 жыл бұрын
And now.. Over 300k
@ignitoracing2 ай бұрын
I'm from the future, he has 111k now!
@albertperry85776 жыл бұрын
This is awesome! I have the exact same slider and the exact problem/downside of no motor; alas, I don't have all the tools you have! But some day I 'll be able to motorize my slider! Great content!
@sergeycrane93847 жыл бұрын
After seeing this kind of stuff, i think, people with whom i planin to share this, will start making their own rigs by your design soon. Thanks for your efforts to making this video happen.
@MaxMakerChannel7 жыл бұрын
Thank you very much! Please send pictures when they do!
@sergeycrane93847 жыл бұрын
I hope this will happen as soon as possible. Still. Keep making this kind of videos it's very useful. I'm myself not a man with a hands in the right place for doing all this, but can you tell, will this rig work for DLS Cameras like Canon 5D Mk II/IV or others with same sizes?
@MaxMakerChannel7 жыл бұрын
Сергей Владимирович Yes you can use it with heavy cameras if you use a nema 17 motor with a gearbox. You can get them with 1:5 up to 1:51!
@sergeycrane93847 жыл бұрын
Thanks!
@mertgunes98547 жыл бұрын
Dude you are awesome, seriously this was one of the smoothest videos of this sort that I've ever seen.
@MaxMakerChannel7 жыл бұрын
+Mert Güneş Wow. Your comment is awesome! Thank you!
@alfonsotalamantes7 жыл бұрын
Dear Max! Great video and a smooth way of resolving the operation of the slider by the binary switches! Amazing solution.
@MaxMakerChannel7 жыл бұрын
Thank you very much! Binary switches, I never thought about that name.
@phalcon235 жыл бұрын
Suggestion, change to 4 momentary push buttons one for seconds, one for 10s of seconds +/-, and i2c LCD screen Use that for speed control. Also add micro switches for at the end of travel for safety. OR you could also use 5 buttons, +/-, select, enter, back. and then you can adjust things like speed/distance/repeat (go back and forth non-stop) as well
@mcremona7 жыл бұрын
Nice! I like the combo switches. Great idea
@MaxMakerChannel7 жыл бұрын
Thank you! I wanted to use a potentiomer initially, but that is not precise enough to go from seconds to many hours.
@stephenlanders4 жыл бұрын
@@MaxMakerChannel hi max thinking of making one of these getting all the gear together regarding the switches did you or anybody else experiment with multiturn pots i have one somewhere and going to experiment with it will update on it ok great video and easy to follow ok regards steve
@MaxMakerChannel4 жыл бұрын
@@stephenlanders Of course you can also use a Poti. Changing the code should be easy enough. It is maths after all and you can figure it out. I personally never used those pots. How would you know what setting you are on?
@stephenlanders4 жыл бұрын
@@MaxMakerChannel just a matter of trial and error i suppose but will try your method first and play around with the settings
@ricardoabreu49975 жыл бұрын
How can somebody deslike this video? It was well done and edited. Good job Max
@VocalCityProductions7 жыл бұрын
Only producers with engineering can get this ❤️❤️❤️🙌🙌
@EpicBenjo7 жыл бұрын
1,2,3,4 = 10s? Or 10h? Wow this is so cool! You can definitely sell this as a kit!
@MaxMakerChannel7 жыл бұрын
+Epic Benjo I would but I don't know electronics haha
@engineershexamartin3 жыл бұрын
Thanx Max, I have enjoyed your splendid staff. Keep it coming. I am currently working on something that needs a camera slider. You have helped,....
@ipadize4 жыл бұрын
if you can get a TMC2208, go get it because you cannot really hear the motor because it is so quiet and smooth. And you can set parameters via UART
@MetaZoo227 жыл бұрын
Really great video. That turned out way better than I was expecting.
@MaxMakerChannel7 жыл бұрын
+npsantini Thanks! Why did you have bad expectations though? 🤕
@MetaZoo227 жыл бұрын
This is the first video I've seen from you and I imagined it would be a tough project and something that would be hard to make look good. What you made looks great and seems to work really well.
@MaxMakerChannel7 жыл бұрын
+npsantini haha. Thanks!
@thangasaravanan7 жыл бұрын
CREATORS ARE THE SECOND GOD OF UNIVERSE.
@Vinja_Wolters Жыл бұрын
You are really good with the editing of your video’s next to all the stuf you make. And i like that you are German, i feel like a lot of content creators are American (nothing agains Americans, i just find it refreshing since i am Dutch) grtz from the Netherlands!
@MaxMakerChannel Жыл бұрын
Thanks for watching! Greetings to the Neatherlands!
@CulinaryExploration5 жыл бұрын
I thought the build was great... then.. you just casually printed a case... Great job, loved the vid
@craftedworkshop7 жыл бұрын
Great video Max! This is super cool.
@MaxMakerChannel7 жыл бұрын
+Crafted Workshop Thank you very much!!
@rodstartube7 жыл бұрын
[5:01] I think the last speed "1,2,3,4" should be labeled as "10h" instead of "10s"
@RehaOzer19627 жыл бұрын
very well done. I do not understand what is the problem for these 13 people who do not like this video, maybe a little jealousy or may be your neighbors :)
@ZedsTechTips6 жыл бұрын
I wouldn't have the skill to do this. Great stuff!
@MaxMakerChannel6 жыл бұрын
At first I didn’t have either.
@ZedsTechTips6 жыл бұрын
@@MaxMakerChannel So true. We all learn
@rigilchrist Жыл бұрын
How about coding the Ardino to calculate ramping at each end, so as to create a smooth start and stop? I love your work!
@danbowie23587 жыл бұрын
Nice build, well done Max!
@MaxMakerChannel7 жыл бұрын
+Dan Bowie Thank you!!
@NorthlandDWJ7 жыл бұрын
Can this hold a DSLR camera. How much weight do you think it can pull?
@JeremyCook7 жыл бұрын
Nice attention to details, and great sample footage at the end! I like the drone mount idea too.
@MaxMakerChannel7 жыл бұрын
+Jeremy Cook's Projects Thank you very much! I was lucky with the timing. I got out of bed and saw the solar panels covered in frost and it was the first sunny day in weeks.
@vinzyvisuals64727 жыл бұрын
Hello from India, You earned a subscription.
@MaxMakerChannel7 жыл бұрын
Namaste! Thank you!
@ScottBrownCarpentry6 жыл бұрын
you're a wizard
@accessradiotherapyltd36685 жыл бұрын
This is absolutely epic Max!
@goldbunny19737 жыл бұрын
Good video - love so much about this video. *Drill 1 motor screw hole then recreate a box shape to accurately centre the other 3 holes instead of drilling all 4. There are some excellent woodwork tricks that eradicate errors when doing tasks like this.
@MaxMakerChannel7 жыл бұрын
+The Mouse Yeah that is a good idea. The holes came out alright. The problem was more that they interfered with the curved rails on the other side.
@goldbunny19737 жыл бұрын
Ok, well I was responding to hearing "drilled 4 holes, only 2 screws fit". Can't help you with curved rail issue, LOL. All yours!
@TECH4047 жыл бұрын
Nice bit of work really enjoyed it
@MaxMakerChannel7 жыл бұрын
+TECH 404 Thank you! More videos coming soon.
@kntran103 жыл бұрын
You know the video is going to be good when you hear a European scientist accent.
@dmm86583 жыл бұрын
If it’s cold in your workshop, you can use a heat gun on low blow setting to dry the paint faster.
@calebsuggs5 жыл бұрын
When one video makes you consider majoring in engineering.
@MaxMakerChannel5 жыл бұрын
Thats what I did : )
@901D6 жыл бұрын
진짜 잘만드셨네요 충분히 따라할수도 있게끔 잘 설명해주셔서 감사합니다
@miguelquiroz15503 жыл бұрын
Wow ... Perfect.... Thanks for that video!
@pill3drums8 ай бұрын
Huge dude that's lit 🎉🔥
@matusisaac34254 жыл бұрын
Max, you are a genius! Nice work
@MaxMakerChannel4 жыл бұрын
Thank you!
@birseyleryap5 жыл бұрын
please please continue making brother.. you aRE BIG inspiration:)
@MaxMakerChannel5 жыл бұрын
I will! Thanks for your kind words!
@i_g98547 жыл бұрын
I love these types of projects
@MaxMakerChannel7 жыл бұрын
+Ishu Gangwar I am glad you do.
@StamatisKekes4 жыл бұрын
It's what I need to level up my drum cover videos ...
@Musho5 жыл бұрын
Beautifully designed for smooth movement
@aquirion7 жыл бұрын
Really nice. A nice feature to implement in the code would be speed ramping. That helps a lot for really nice timelapses
@MaxMakerChannel7 жыл бұрын
+Antoine Quirion Couture That is a good idea. So far I chopped away the start and the end to get rid of the shaking. How would you implement it?
@aquirion7 жыл бұрын
Max Maker unfortunately , I have zero experience in arduino programmation . But take a look at what rhino slider does . It's really a amazing motorised slider
@TheJewellian7 жыл бұрын
one word...genius!
@MaxMakerChannel7 жыл бұрын
+Julian Davies Ah. Its not that difficult if you put a lot of work into it.
@ignitoracing2 ай бұрын
amazing!! No end switches? Cant this now self-destruct if the motor keeps scrolling itself after the stop?
@MaxMakerChannel2 ай бұрын
The belt would just slip.
@SubhrantSukumar6 жыл бұрын
Ohhh , really a great engineering. Such A perfectionist you are Good job
@MaxMakerChannel6 жыл бұрын
Thanks!
@nathanameru76547 жыл бұрын
should make a flat electric vibration damping machine. 3 copper coils in triangle formation with their ends free, spring in center, a plate with magnets in correlation with coils, clever code that can use the polarity to attract and repel the magnets and place the plate in certain position. add a gyro to counter vibration and boom a flat electric vibration damping machine. gets rid of more vibration than silicon mounts.
@andysuzierawlins5462 Жыл бұрын
Looks brilliant, I have no electronics knowledge, wish I knew someone who did
@RJMaker7 жыл бұрын
Great Build!
@MaxMakerChannel7 жыл бұрын
+RJ_Make Thank you!
@cutestanimalsshorts70147 жыл бұрын
Good Luck Man For Future Doing Mind Blowing
@MaxMakerChannel7 жыл бұрын
+TECH STUDIO Thanks! New video coming out very soon!
@DrawingTimeLapse6 жыл бұрын
You can use analog input with variable-resistor for fine tuning control of speed
@digimaks9 ай бұрын
Interesting... I like the fact that it has arduino control- in which case- it is open source output - that can be modified with code and software control. I need a motorized slider rig that can 1) read any motion given from software, 2) repeat that motion seamlesly several times, and 3) do same motion but with frame by frame steps (for stop motion camera move)
@zulboy016 жыл бұрын
i recommend to use knob just to controll all the speed. it pretty less size needed
@DylanSaliba7 жыл бұрын
Solid build! agree working on electronics IS relaxing as long as you have the proper tools! You may have convinced me to try this build. Thanks for sharing!!
@MaxMakerChannel7 жыл бұрын
+Dylan Saliba Thats cool. Please send a picture if you do. What is your background?
@DylanSaliba7 жыл бұрын
I'm a commercial cinematographer by trade but I like to make films with my friends on the weekends. I'll be sure to post a pic!
@MaxMakerChannel7 жыл бұрын
+Dylan Saliba Cool. What brands or systems do professionals use?
@DylanSaliba7 жыл бұрын
We use anything we can get our hands on! It's the photographer, not the camera! :D
@MaxMakerChannel7 жыл бұрын
Haha. I shoot on an iPhone : )
@manan13525 жыл бұрын
Dropped jaw when I saw the 3D printer
@Melkano7 жыл бұрын
You dont upload the code in your instrucable : ( i'm a frensh maker and il would like to make your slider for impouve my vidéo can you help me ?
@SavvasPapasavva7 жыл бұрын
This is cool.
@MaxMakerChannel7 жыл бұрын
+Savvas Papasavva Thanks : )
@MultiCrazycat1237 жыл бұрын
Hey Max, just stumbled onto your channel. I really enjoy the way you present your builds, very enjoyable to watch. I look forward to your future content! Keep up the good work!
@MaxMakerChannel7 жыл бұрын
+mheiny Hey! Welcome to the club and thank you very much!
@DavidsMusicChannel3 жыл бұрын
Hi there. I built one recently and powering it with a 9v battery . It doesn’t pull my DSLR. Any idea if upping the voltage might help ?
@SimonAndersonphotography7 жыл бұрын
That is sooo cool, what a great product, unfortunately even though you say it's simple it looks outside my comfort and expertise zone, still awesome though so thanks for sharing :-)
@MaxMakerChannel7 жыл бұрын
+Simon Anderson Thank you. You grow with your projects. I believe in you!
@SimonAndersonphotography7 жыл бұрын
Max Maker Thank you :-)
@computerjantje6 жыл бұрын
It is always dangerous to say something is simple. For the one who already knows, it always seems simple.
@ModelMinutes5 жыл бұрын
Nice! If only i had the confidence to work with metal :P
@MaxMakerChannel5 жыл бұрын
Aluminium can be worked just like wood, just that you don’t need to care about grain structure and all that.
@isagive4 жыл бұрын
Very cool max.
@Dragan_Drazic7 жыл бұрын
Great idea and well done. Thanks a lot.
@MaxMakerChannel7 жыл бұрын
+Dragan Drazic Thank you! I am glad.
@kamel3d6 жыл бұрын
This is so clever well done
@luxo93007 жыл бұрын
4 bit controller is just a great idea!!!
@MaxMakerChannel7 жыл бұрын
luxo9300 Thanks!
@stephenlanders4 жыл бұрын
hi max have now finished builing mine using your code etc and your circuit ,only trouble im getting is when turn the supply on to judders have tried putting a bigger capacitor in also tried a diode across the input but it still judders on start up just wondered did you have idea what it is .great design anyway ok
@indopacificfilms2354Ай бұрын
Would you make a water proof motor that I can use on slider underwater ?
@macthesmac5 жыл бұрын
Thanks for inspiring us broke boys lol. I don’t have $500 for a pro rig lol
@Graveltongue5 жыл бұрын
It's a great video, I love a good BYO. Can you include the video of you adding all the gear to your workshop, learning how to use it and how much you charge per hour for your engineering skills! I appreciate your effort but it's not an option for most of us.
@BrasspineappleProductions5 жыл бұрын
I like this MAX !
@MaxMakerChannel5 жыл бұрын
Thanks!
@kirillvoloshin20657 жыл бұрын
awesome. I am going to build my own. That's why I have a question: as long as this is a friction slider, is there a possibility to potentially decrease friction between rails and the platform for a camera without buying different slider? I want to add controlled time lapse functionality so the lesser external factors (for example, friction and vibration) there are, the more control I can get. thank you for inspiration and response
@MaxMakerChannel7 жыл бұрын
+K V The vibration occours at different speeds. At high speeds the vibration comes from the motor and the whipping belt. At slow speeds the shaking cones from the momentum of the camera that moved the anti vibration mount. Friction does not make a great difference. I belive though that you could use makerslides with bearings and adjustable wheels for about 100$.
@peterpreisdinslaken15106 жыл бұрын
Klasse gemacht gefällt mir außerordentlich gut LG.Pidi
@TheBoomBoomRoomStLouis3 жыл бұрын
You are a God!
@TK421385 жыл бұрын
Nice work!
@JMWConceptsTheOfficial7 жыл бұрын
Thanks for this +Max Maker. I'm wanting to test this out but I'm struggling a little to make sense of the code. Would you consider doing a video on how to set the code up on the Arduino? I'm very new to this and any assistance is greatly appreciated. Jesse. JMW Concepts
@andrewsmall65687 жыл бұрын
Just awesome and love the accent.
@MaxMakerChannel7 жыл бұрын
+Andrew Small Thank you! I could live without it.
@computerjantje6 жыл бұрын
Would there be a reason to not place the motor on the slider and glu the belt to the rail. That way making the length of the slide longer and shorter would become easier. And there need to go wires to the camera anyway or the motor could be on batteries if you really want no wires to the moving platform. Also "no end stops" as a safety stop would make me nervious as also an arduino can sometimes be wrong.
@SebastiaanMollema7 жыл бұрын
Hi max, nicely made! Is this setup strong enough to work vertical? For a gopro or smartphone cam. Thanks for sharing!
@MaxMakerChannel7 жыл бұрын
+Sebastiaan Mollema Thank you. Definitely works with a gopro or smartphone. For a DSLR there are steppers with integrated gearboxes available. Look for "Nema 17 gearbox".
@TheMarcball7 жыл бұрын
coming over from our man Jimmy DiResta. Enjoy ! Keep on trucking (from France) !
@MaxMakerChannel7 жыл бұрын
+MakeFix Welcome!!
@ShcherbynaM5 жыл бұрын
Cool! Camera with an umbrella :) You made my day)
@AMGTOUGEX7 жыл бұрын
wow. so far you have the best build for this application. small profile, easy to build, and best of all.... $50! do you sell the 3d printed box? thanks for the share, max!
@MaxMakerChannel7 жыл бұрын
Thank you very much! I always give my best. Anyone can do average. I don´t sell them, but you can download the files from the instructable. I know that many people in 3D printer groups on Facebook offer their print services.
@DCT_Aaron_Engineering7 жыл бұрын
Fantastic video, well done ;-)
@MaxMakerChannel7 жыл бұрын
+DCTTeacher1 Thank you!
@danterusso63547 жыл бұрын
Well done! Just subscribed. Thanks for sharing.
@MaxMakerChannel7 жыл бұрын
Thanks and welcome!
@Arunkumar-raja7 жыл бұрын
Awesome work...I have doubt, How to control this stepper motor clock wise and anticlockwise ..If any switch is there. Or once reach the slider end automatically come back.. pls explain me ....Thank you
@MaxMakerChannel7 жыл бұрын
Look into stepper motor basic tutorials for Arduino. There you will learn how to reverse them. It is easy.
@Alessolito6 жыл бұрын
Really nice project!
@MaxMakerChannel6 жыл бұрын
Thanks!
@EposVox7 жыл бұрын
Man super cool and more in my budget, but not sure I could do it. Sigh.
@MaxMakerChannel7 жыл бұрын
+EposVox I believe in you! You got to start as a noob at some poi t.
@safemode85988 ай бұрын
Thanks Max, you are a good builder, but the cost of setting up a work shop for this project is so high I might as well just buy the slider I need.
@BushidoPhoto7 жыл бұрын
Is it possible to use a variable power knob instead of the switches? One with a pot that could be pushed in to activate/deactivate it? I have no idea what to buy if that can be done.
@MaxMakerChannel7 жыл бұрын
Yes. Instead of using the 4 switches, you can add a potentiometer. You can probably adjust it in 10 increments by eye, although they won´t be discrete. So you could have 10 settings. (if resistance > 0 &&
@groundbreakerexplore2 жыл бұрын
Thank you for this video tutorial
@JesseSieff5 жыл бұрын
Hi Max! I am interested in doing a project like this for my camera slider, but I have 2 daunting constraints: the slider runs autonomously AND it is absolutely silent. My goal is to record musicians close up so it would be ideal to not hear a whirring motor on the microphones. Do you think this is feasible, and how do you recommend I proceed? Thank you, and fantastic video!
@MaxMakerChannel5 жыл бұрын
I would suggest using a DC motor with a motor controller for $15 from Amazon. Get a good quality slider with ball bearings. It will be quite silent.
@DanielH5 жыл бұрын
Nice slider. I have the motor and I'm not sure if arduino is going to work for me. Also subscribed to your channel.
@MaxMakerChannel5 жыл бұрын
You can use a normal motor too and a simple motor controller with a turning knob.
@DanielH5 жыл бұрын
@@MaxMakerChannel can youpl point me to one?
@MaxMakerChannel5 жыл бұрын
www.amazon.com/RioRand-RR-PWM-15V-Voltage-Motor-Controller/dp/B00N30UK2M/ref=mp_s_a_1_8?crid=31ZT0Y18ZAKBF&keywords=motor+controller&qid=1554053763&s=gateway&sprefix=motor+co&sr=8-8 Something like this. The motor should be about as big as a kiwi🥝 . That size should give you enough torque but not consume too much power. 12V maybe.
@copyright246 жыл бұрын
Hey, it's exactly what I'm looking for, but I'm a beginner and I've maybe a stupid question but, in the schem at 6:50 , where are the wire for the stepper motor ?
@TigerKoehn6 жыл бұрын
Great vid, but, honestly, most of us don't have a machine shop and pro machining gear just laying around. The video is ironically hilarious due to the fact that, Max, a German Cat, ( Cliche) just happens to have a pro machine shop in his house. Oh, He's an Engineer, okay, we get it.Typical. Filmmakers like myself live in a big city. Thanks, Max, I think this would be great for a film crew with shop equipment. I could see rigging this on location. Everyday practical?- absolutely not. Professionally practical, Absolutely!!
@MaxMakerChannel6 жыл бұрын
Thanks, but all you need is a drill and a hacksaw pretty much and some soldering equipment. You can also go to a local maker space where they have all you need including 3D printers.
@TigerKoehn6 жыл бұрын
Max, you lost me At Soldering. Filing , oiling. We’re not doing all that on set. Like, I said, it’s great if you have a Pro or Home shop. You’ve made a great tutorial, but if you’ve ever worked on an actual shoot this is insane. Time is money on a set BIG TIME. This is a great project, no doubt so thank you for you concise tutorial
@kkfoto6 жыл бұрын
It's pretty obvious you're not doing all that on set. You're supposed to do that before the shoot. And any simple machine shop will suffice.
@ryanredmond91952 жыл бұрын
Could you not make an even simpler one using a traditional DC motor and a rheostat for variable speed control, with two limit switches to stop it at either end?