I'am making a car that should carry 50 kg and move at a speed of 10 km/hr. Can anyone help me in choosing the right DC motor??

Posted by Masked_r 1 year ago

Motors and servos

Please all, what motor could I use to create a to/fro movent?

Posted by ijem 10 months ago

Stepper motors for sale

I have a few large stepper motors I pulled out of a liquid sinilation counter. I'm not exactly sure what thier value is, similair motors are priced around 50-60$ new, so offers are welcome. They operate ~6v and have 0.90 degree steps, I believe they are bipolar. I can upload pics if needed.

Posted by martzsam 5 years ago

Need help wiring salvaged electric motor

Hello, I have an electric motor I salvaged from a clothes dryer. I would like to add a three prong plug to it. However, I'm not experienced enough to read a schematic and I can't find any other tutorials that use the same motor. It's from a 2014 Whirlpool Dryer. I need to know where to connect the black, white and green wires. Any help is appreciated.

Posted by ttemple2 1 year ago

Electric Motors 1/6 - 1/2 hp Super Cheap!

Hey Instructable Community! I've fallen into a consistent supply of used electric motors and I'd love to offer them to the people in this community. I was going to start selling them on Ebay but I like you all much more than those randoms and I'm even willing to offer them to you for a lower price because this site has literally changed my life. Not to mention, I be you'll have a much more creative use for an electric motor. Details and Disclosures: These motors are used and are coming out of Air Conditioning Units that a buddy of mine scraps. (He installs units and takes the old ones) He was junking the motors for mixed metal scrap prices and I figured I knew some people that might value them. I have some 115v motors and many more 220v motors. These motors range from 1/6hp to 1/2hp. I test the 115v motors but don't have a current setup for testing the 220v motors. That said, they were working when the units were replaced. I am very flexible on price. Motors range from $25 - $60. (Plus shipping)  I'll go even cheaper if you want a few. After receiving payment I can usually ship within a few days. I'd also be willing to meet up if you are in the general Philly area! This is a great opportunity to power your next AMAZING Instructable. I promise to do honest business lest the Instructables staff delete my account. (I've got about 2 years of pro that I'm not willing to give up) I hope to hear from you all soon!!!

Posted by JosephR25 2 years ago

Help figuring out electric motors

I'm trying to decipher the mystical language of electric motors and need some help. I was at one of my favorite stores yesterday, a place called 'Industrial Liquidators' here in San Diego, and I was looking at their vast supply of electric motors. Big ones, small ones, battery operated ones, flat one, all in latest styles and fashionable colors. I know of plenty of uses for these things but I have no idea what it is I'm looking at. I would like to make my own rock polishing tumbler, so I'd like a motor with a bit or power and a slow rotation, but how can I figure out how strong and fast a motor is?Maybe I'm starting at the wrong place. I must admit that I know next to nothing about electrical stuff. Pretty much the only thing I know about electrical equipment is that it only works when you plug it into a socket.So that being what it is, can anyone direct me to a website that explains how to read these motor labels? Ya know the ones that say how many ohms, volts, amps etc.Thanks for any help.

Posted by astro347 9 years ago

i need help making a cnc hot foam cutter out of scanner motors

Can anyone give me some instructions on a easy cnc hot foam cutter out of old hp scanjet and mustek flatbed scanners, also in the process of getting old copier machines. can I use the controllers on the scanners to run the motors, or am i better off just buying the motors and controllers. any suggestions would be greatly appreciated I am very new to this stuff tia mike

Posted by mgriff 7 years ago

Controlling anaerobic digesters with arduino

Hi I am new on the Arduino scene and I am trying to build eight anaerobic digester tanks to conduct experiments for my thesis in engineering. The setup will look as follows: -Arduino mega -Arduino motor shield R3 -Two motor stirring the digester at different RPMs. Motors will run at 12 V and around 0.5-1 A. -The motor shield will use the wall jack as power supply via an AC-DC adapter. -Biogas volume measuring device (tipping sensor) -Aquaria air pump to supply Hydrogen Sulphite consuming bacteria with oxygen. This will be controlled with a relay and the volume measuring device. -The pump will use the wall jack as power supply -Temperature sensors DS18B20. -Immersion heater controlled by the temperature sensor and a relay. The digester is supposed to be kept at 37°. Everything will be logged but I haven’t decided if I will connect a Ethernet shield or if I should log on a SD card. I think that I can manage to build it but I have some questions (a lot) but will just post some and post more later. The experiments will run for 4-6 months how will the Arduino, shield and relays handle being on for that long? Do I need something with higher quality? (It would suck to burn down the university) Any spontaneous thoughts that I should know or that could help me?

Posted by joche11 3 years ago

A basic (very basic) description of a Brushless DC motor.

So... before I start... I am not a physicist, nor am I an electrical engineer. Hopefully someone within one of those (or both) professions will chime in and enrich this discussion. That said... I'm going to be using leyman's terms. This thread is specifically meant to explain how a brushless DC electric motor exerts a force, and how that force is used to generate work. To start off, I'd Like to explain the components which comprise a brushless DC motor: First... You have an axil. The axil's purpose is to spin. Next you have natural magnets, or solid state magnet; I use the terms somewhat incorrectly, since a natural magnet refers specifically to nickel or ferrous base magnets, but there exist a large variety of compounds and composites that exhibit the ability to produce magnetic fields. In practice you have many in a motor, but for our purposes... we can pretend we have one. The natural magnet's job is exert a magnetic field while attached to the axil. After that we have an electrical coil. Once again, in Brushless DC motors, we have many of these, but for our purposes we'll use 3. The electrical coil's job is to produce a magnetic field which can move in a circle. Finally we have the engine housing. The purpose of the engine housing is to hold everything together. Note: I'm intentionally leaving out the computer control mechanism. there are alot of great instructables on microcontrollers. Most Brushless DC motors requrie one to work since there is no mechanical timing device, as there is in a brushed engine. So... how does this fit together? In this setup the natural magnet produces a force when next to the electrical coil (This coil is also known as an electromagnet). This is because the charge of the coil is opposite to the charge of the natural magnet. Once the Natural magnet and the electromagnetic coil align with each other, the first coil shuts off and the second turns on. Once again the natural magnet is drawn towards the magnetic pole. This process repeats until the natural magnet has spun in a circle (note: usually you want it to continue to spin beyond a single revolution.) That's the basic (very basic) idea behind a Brushless DC Motor.

Posted by Qcks 10 years ago

Pager motors: Removing weight and driving wheels

Hello fellow life forms, I am currently working volunteerily at a local school, teaching young kids a bit about telescopes and astronomy. One topic I am currently planning is the mars rover(s) and I am planning on building a simple line follower as activity. As the budget is very low but I still want the kids to be able to build something to take home I am trying to keep it as simple as possible. After I ordered a pager/iphone motor a year back or so, I now ordered 100 vibration motors for $28.50 at aliexpress. They work fine but are smaller then the one I had before, a rubbery encasing makes them the same form factor.  (excuse the horrible pictures, I just have a older android phone) 1) The first problem is removing the weight. I have searched and found several tutorials (for example and aproaces, heat and regular pliers failed, for everything else I lack smaller tools.   I consider ordering those grip pliers here in germany, which one would be better?;=item233228bf95 or;=item3cdd210995 I also considered a watch wrist band tool as I have only a limited set of tools,;=item566039355f or;=item1e8539d1a5 or;=item485b0c8224 But I don't think I can adapt them to hold the motors. Any other tricks? 2) The second problem is to drive small wheels with those motors. With the vibration weight attached I can't drive a small foam or cardboard wheel, neither via friction nor a rubber band/belt. I hope it will work once the weight is off. I hope I can solve this issue, else I am stuck with 100 motors that are only suitable for bristle bots ;-) The vibration is strong enoug to move something, also attaching the motors to a cardboard square and directly touch the ground seems to have enough power. I could use a 3d printer to print a gear, but I would like to keep it as simple as possible. Also the groove bearing + shrink tube drive I have seen on another project would not be ideal to build with younger children. I initially was thinking of using bottle caps as wheels and wrap the motor axis with shrink tubing or isolation tape to drive the bottle cap by friction. Thanks for any ideas, advice or suggestions! -Marcus

Posted by schorhr 4 years ago

tiny motors& gears

I need someone to convert a motorized tooth brush into a reciprocating needle tool for me,for a fee.

Posted by gag 10 years ago

Heavy duty motor controller system

I'm attempting to build a rather large bot using wheelchair motors as it seems many other people have done. However I'm trying to determine the best way to control them. Anyone have any suggestions on a motor shield/motor control board powerful enough to do so or have a recommendation for a specific motor controller or arduino relay board that could work?

Posted by dstech 3 years ago

Super basic resource for learning electric motors

I watch an insane amount of YouTube, particularly woodworking, as designing and building furniture is my big passion in life. I have, however, become more and more interested in learning about motors. It has become increasingly obvious to me that literally, every tool in a workshop is simply a motor that turns something. Saws, drills, sanders, planers, jointers, even dust collectors are all nothing more than a motor turning something around and around in a circle.   I just bought a new Table Saw, and during my 6 months of researching, I read all about 1, 2, 3, and even 5 horsepower motors. Single-phase vs. three phase. rpms, 110V vs 120V vs 220 vs 240V etc etc etc... It was all mostly abstract, as I could tell that higher horsepower means "good" and lower horsepower means "less good." But now, I have a lot of projects that I want to build, but I know nothing about motors.  I've been watching a lot of Matthias Wandel on YouTube, and I want to know everything there is to know about motors. Unfortunately, I don't know anything really about electronics at all. But I feel like learning about motors is a great place to start learning. Does anyone have a book or a resource that literally takes things back to motors 101 for 10 year olds?

Posted by Dolmetscher007 1 year ago

Help with my brainstorm

Hi everyone, I have an idea for a new gizmo that I'm trying to make a working model of. It will use a 12volt electric motor and want to spend as little as possible on it until I'm pretty sure it will work, so I'm going to scavenge for parts when I can. The most expensive parts that will go into it is the electric motor and the battery and I have a few questions: 1- Does an electric motor draw whatever power it needs or is the power forced into it? 2- If it draws what it needs, can I take a 12volt motor and use an 18v battery with it without problems? So if I scavenge an electric motor from a 12v battery powered drill can I run it with an 18v lithium battery? 3- What about the amps? If I use a 12v motor that normally runs off a 12v car battery, can I run it with an 18v lithium battery that has less amps? 4- Any other specs I need to focus on? 5- When I find the right electric motor, which I think will be a small 12v gearmotor, where should I go to find a low cost supplier? I'll have more questions later but if you could help me with this I can get started. Thank you! Bretina

Posted by Bretina 5 years ago

Help Needed: How to use Arduino to Power a Motor and 4 PIR Motion Sensors as Switches?

Hello all! I am in need of help. I'm making sculptures that I want to rotate when people walk by. The sculptures will be about 4 1/2 feet tall but light, about half a pound. I want them to spin slowly, around 1-2 rotations per second.  I am hoping to use an Arduino to power a DC motor (or a stepper motor is ideal because it's easier to find one with a flat bottom, but I understand it's also more electronically complicated). I want to use four PRI sensors (one on each side of a square base) as switches to turn on the motor when people walk by. I want to code the Arduino to turn off the motor after about 7 seconds, and the turn it back on if the sensor is triggered again.  I am open to suggestions on every level of this project, including which materials to use, schematics, battery power and code. I've been messing around with it for a while, but I basically feel like I need someone to walk me through it. I've gotten one PRI hooked up to work, but I have no idea how to connect a second, third and fourth, or how to plug it all into an external battery source (a motorcycle battery, a gel cell battery have both been suggested to me, but I'm worried that might be too much power?) Currently I have an Arduino R3 Plus, Osepp and Raspberry PRI sensors, a 12V DC motor, a 12V stepper motor and various other wires and resistors to hook it all up.  Do I need a larger Arduino? What kind of battery power do I use? Any help you can give me would be so Appreciated!!  Thank you very much,  Nicole

Posted by Bennett88 2 years ago

sensors and servos

I am working on a piece where I need to hook up 7 servo motors to the arduino (each rotating at a different speed, some in one direction, others in the other) but basically an on/off with a motion sensor. I am using a full rotation servo. I amusing an infrared sensor but the servo is still moving (awkwardly and jerky) when not sensing motion, but then runs as normal.Here is the code I am using (right now, I am only at 1 servo – trying to get the sensor right first) : #include Servo myservo;int potPin = 0; //analog pin used to connect the sensor int ledPin = 9; //select pin for the servoint val = 0; //variable to read the value from the analog pin void setup(){   myservo.attach(9); //set up the servo as usual pinMode(ledPin, OUTPUT); //variable to store the value coming from the sensor   Serial.begin(9600); //for watching the speeds in the serial monitor} void loop() { val = analogRead(potPin); // read the value from the sensor   val = map(val,0,600,0,255); if (val>80) digitalWrite(ledPin, HIGH); //turn the ledPin on    else if (val<80) digitalWrite(ledPin, LOW); //turn the LedPin off   Serial.println(val); delay(10); } – any suggestions?

Posted by wwischer 7 years ago

WTD: Maker w/ Engineering deg to help vet & test build concept.

Hi folks. I've had this concept swirling in my head for a while. Though I'm a tinkerer I'm not an engineering major. I'd like to find someone (within the US) who might be willing to help me vet the feasibility of building this little device.  If deemed possible via laws of physics  also build a prototype.  I'd put a total rough estimate of something that cost $10-$30 in overall parts. So anyone with some engineering background and access to a 3D printer feel free to PM me and let me know about the types of projects you've worked on in the past. Thanks.

Posted by WirelessGuyN 3 years ago

FS: BIG electric motors

've got three 36v forklift steering motors. They're big, beefy, and used. Rated as 1 1/3 HP "special" duty. They draw 4.1A no load at 36v. With the gearbox, they draw 4.3A no load. Speed for the motor alone 3225RPM , with the gearbox is 75RPM. Torque must be something outrageous. They have an optional mating 43:1 Sumitomo-made gearbox which I reckon would make these some great drive motors for a large heavy project. Without gearbox, they would be excellent for go-karts, suicidal ebikes, etc. I even know of a e-car project that used a similar motor. (forkenswift) The motors alone weigh about 18lbs. Not sure what they weigh with the gearbox. You want one. I have three. I'm asking $100 each for the whole motor/gearbox shebang. Pictures:

Posted by nedfunnell 10 years ago

Dual H-Bridge Motor Driver - L298N not given enough power to motors

Hi there, am very new to the electronics community, I recent bought my first arduino. I wanted to build me own RC car, so I bought Dual H-Bridge Motor Driver L298N Module from ebay (;=item3a8223049b) I think I have connected everything correctly but somehow the 2 dc motors connected to the motor driver don't seem to move, I have tried a 9v battery to power the motor shield but doesn't seem to do anything. I  used this diagram do the connection to the arduino The arduino itself has it own 9v battery powering it. I have checked both motors and they work fine. when i switch on the rc car the led on the motor shield blinks but the motors just don't move. I used a digital multimeter to measure the voltage going into the motor. it goes upto 0.36v  then drops. does that mean there isn't enough voltage going into the motors? and how much voltage do you recommend to get it working? Images of the rc car The code am running on the arduino //motor A int dir1PinA = 2; int dir2PinA = 3; int speedPinA = 9; //motor B int dir1PinB = 4; int dir2PinB = 5; int speedPinB = 10; unsigned long time; int speed; int dir; void setup(){   pinMode(dir1PinA,OUTPUT); pinMode(dir2PinA,OUTPUT); pinMode(speedPinA,OUTPUT); pinMode(dir1PinB,OUTPUT); pinMode(dir2PinB,OUTPUT); pinMode(speedPinB,OUTPUT); time = millis(); speed = 0; dir = 1; } void loop(){     analogWrite(speedPinA, speed);   analogWrite(speedPinB,255 - speed);     //set direction   if(1 == dir){     digitalWrite(dir1PinA, LOW);     digitalWrite(dir2PinA, HIGH);     digitalWrite(dir1PinB, HIGH);     digitalWrite(dir2PinB, LOW);   }else{     digitalWrite(dir1PinA, HIGH);     digitalWrite(dir2PinA, LOW);     digitalWrite(dir1PinB, LOW);     digitalWrite(dir2PinB, HIGH);   }     if(millis() - time > 5000){     time = millis();     speed += 20;     if(speed > 255){       speed = 0;     }     if(1 == dir){       dir = 0;     }else{       dir = 1;     }   }   }

Posted by Raphael1 4 years ago

need help coding Arduino to drive two 12V DC brushed motors

Hi – I need the coding for an Arduino Mega to (separately) spin two 12V DC brushed motors through a pair of MOSFETs to about 2,000rpm. I’ll be using  Hall effect sensors and magnets mounted on the motor couplings to provide actual speed feedback. Please help or point me in the right direction?? Many thanks marcelbaur  

Posted by marcelbaur 7 months ago

Choosing drive motors for kids riding toy

I'm building  "robot horse" for my daughter, and have the metal frame mostly complete.  The plan for locomotion is to mount reversible powered 6" wheels to the outside of each hoof, and steer tank-style. My biggest challenge is finding reasonably priced, reasonably powerful drive motors for each wheel.  My issues are  1)  I'm inexperienced at specing dc motors.       A) I'm not real sure how to translate published specs into real world motion.  I don't know exactly how much power it takes to get this reliably moving over rough ground to a top speed of around 1 mph.  I also don't have a good sense of much voltage you can pump into a DC motors.  (IOW, should I be able to push 2 x the rated voltage for a quarter second to get it moving? Will the motors naturally increase their amperage at a constant voltage (and thus power) as they are resisted by torque?)  How much power will starting from a stop take?  What about a slight uphill slope?     B)  I'm not sure what form-factor is best:  Gear motor?  Gear motor with final drive belt?  I would like to use worm-gear motors, as I think it would be safest if the wheels didn't move when unpowered. 2)  Hunting around supplier web-sites, I see lots of $20ish gear motors that use 5-20W of power.  Great price, but would 4 of them make enough power?  (See #1A above)  Also, I see lots of fractional HP motors for >$100 that would unquestionably be strong enough, but would cost more than the project justifies.  I found very little in between.  Are there motors and gear boxes that could power this at a reasonable price?   Relevant clarifications and details: 1)  The horse is about 40" high at it's withers (shoulder) 2)  Frame is made of 1/2" square tube steel. 3)  Normal rider + vehicle will be about 150 lbs.  However, unquestionably, larger kids (or multiple small kids) will at some point hop on it and try to ride it.  At 250 lbs. rider+vehicle weight it doesn't have to go fast, but shouldn't burn up the motors. 4)  It'll be powered by a lipo battery pack that shouldn't have any issues with 20A+ max currents and can be sized as needed for voltage. 5)  I'd like to keep the motors and gears <$200 total, if possible. 6)  "Rough ground" = flat grassy turf or reasonably smooth gravel. 7)  Motors need to be reversible. Can anyone lend some perspective on what type of motors to buy for this?  How much power/torque should I look for?  Any advantages/disadvantages of any particular gearing style for this application? I am assuming that motors on each wheel are the way to go, but if there are any other power transmission schemes that would work better, I'm all ears.

Posted by SvdSinner 1 year ago

What motor should I look into for lifting 50 lbs around 35-40 in. off the ground?

I have a project where I very simply need to raise and lower a flat board with a 50 lbs drill press 35-40 in. and have it stop at the same specific place every time going up and coming down. I've seen TV lift mechanisms and things such as that, but they cost $500 - $1,400. I need this project to cost very little. <$100 if possible. I have a scissor design that I will be made from wood that I already have, so all I need is a motor that can lift 50 lbs up and down, slowly, quietly, and only once or twice a week. But I know nothing about motors.  Here are all the parameters that I can think of.  1.) It will be stationary, i.e. — not require a battery or ever need to be moved.  2.) It must move slowly. Lift the surface approx. 1 in per second. i.e. — around 30 seconds to raise the surface 30 in. or so.  3.) It must be as quiet as is reasonable. It doesn't have to be whisper quiet, but def. not power-drill loud. 4.) It must be as inexpensive as possible.  I do not care about... 1.) Motor weight 2.) Dimensions 3.) Power consumption 4.) Heat production 5.) Longevity... it will be used very rarely so wear & tear is a non-issue really I very much appreciate any help you guys can give. 

Posted by Dolmetscher007 1 year ago

Treetop Ornament Mover/Squirrel Ski Lift/Aerial Transporter

Not sure where this should go, exactly, feel free to recommend.  Last year, for a Christmas lawn decoration, we wanted to have some plywood "gifts" delivered across the lawn. Combined with Santasaurus Rex and his Reindingos, we came up with the following: (embedding not working out for me, link here) We used 20" bicycle wheels held horizontally, supported entirely from above, and ended up using the cheapest electric drill from home depot, with a wheel chucked up, to friction drive one of the bike wheels. This worked, but it was very loud, and the setup from last year was mostly destroyed when we took it all out of the trees.  I'd really like to take another shot at moving ornaments, and the drive end is the biggest hangup. Does anyone have a suggestion on doing something similar? 

Posted by gotcha640 3 years ago

Limiting power to dc motors

I have 2 dc motors that i will control using an arduino using pwm, my input voltage is 9.6 volts from a battery, but i will use a 5v voltage regulator to power the arduino, the motors are 3v motors. How would i limit the voltage to them using resistors, i have two motors here are their specs Typical operating voltage:  3 V Free-run motor shaft speed @ 3V:  12300 rpm Free-run current @ 3V:  150 mA Stall current @ 3V:  2100 mA Motor shaft stall torque @ 3V:  0.5 oz·in

Posted by tgorbunov 4 years ago

how to make 3 motor to move back and forth in sequence?

Hi there .. so im doing this project that needed me to move three motors (12v dc) back and forth 180 degree in sequence automatically.. the process happen when i pushed a push button,the first motor will move back and forth 180 degree.when the first motor back to its original position,the second motor will automatically move and forth 180 degree too.same goes to the third motor. the process ended when the third motor back to its original position. and if i would like to move the motors again, i just need to push the push button.. so i need help with circuit (schematic)and what electronics component i should use?

Posted by cliff_rayner 4 years ago

Need help with AC motor

What is a low cost way of vary a 2 pole ac motor? I know a vfd can handle the job, but I am looking for a way under $100. Also can someone help me out with some wiring. If I have a 120 VAC motor plugged into the wall, how would I reduce the voltage enough to run LEDs off the same supply wire? In other words, I only want to have 1 plug and run a motor and LEDs at the same time. Any help would be greatly appreciated.

Posted by cory_tripp 6 years ago

Driving a bank of DC motors using 4x4 Driver Shield for Arduino

Hey guys,  I am trying to run 8 DC motors through this driver shield. I don't know how to wire it up neither do i know the code for it. I was wondering if anyone could help me.  Thanks

Posted by misty123 5 years ago

DC motor speed controling

HI!  I'm trying to mod my Tascam cassette recorder. I want to be able control speed of the motor. So I bought on ebay PWM controller and after installation thing don't run so smooth as I wish. the problem is ... when pot is all the way down at 7 clock motor is off, when I turn it to 8 a clock motor starts spinning and reaches its full speed at 9 a clock. and from 9 a clock to 4 there is no effect on speed. Please help me! .... my electronic skills are too weak to understand this. p.s  it is 12v dc motor and there is link for the pwm I use.;=STRK%3AMEBIDX%3AIT Thanks    

Posted by AndrisT1 2 years ago

DC magnetics motors and anything else DC

I'm having inventors block figured i'd try to get some other users talking about ideas for dc projects and i'd get a different angle on my work so please post.

Posted by Sessha 6 years ago

I have some random parts(motors, buttons etc(full list inside) and don't know what to make

Ok this is what I have, I am quite new to making stuff, some of it I got out of a portable cd player(which i just happened to get to stop working while messing with it lol) - Button where it keeps signal going as long as it is held down - Motor that has thing on top that spins(you know the thing that spins the cd) - A motor with a gear coming out the side - more gears and a gear on a shaft that is like a screw - batteries, AA, 2 different remote control rechargable batteries that claim to me NiCd battery Packs - spinny wheel that used to change volume on CD player - Headphone slot (kinda think will be useless w/o circut board) - 2 buttons that can slide sideways, and turn stuff on/off - 4 buttons that you can push and do action once - Tape - bunch of other household stuff If anyone thinks of any other household items i can take apart(that my parents won't care) and maybe have good stuff/LED's(I NEED LED's lol) that would help me, I also need to think of something to make, thanks (:

Posted by Coolorange 8 years ago

Motors for Quadcopters

Hi, I am looking to make a quadcopter as my university project and I kinda run in to some problems deciding which motor I need to choose. I was thinking to choose brushless motors as they are more efficient and they give more RPM. HOwever, my professor says that there's no point using brushless/stepper motors as u can get the same RPMs using brushed motors and its the same thing. Hence, can anyone please guide me which motor is best to use and why should I use brushed or brushless motors. I shall be very glad if someone guide me through it. Thank you :)

Posted by Bam Boy 4 years ago

Geared Motors in Household Items

There's only like 15 entries in the robot contest, and I think part of the reason (not all) is the parts that people have on hand. Does anybody know where to get a motor (with a geartrain head on) in a household device? I don't wanna go buy one

Posted by guyfrom7up 10 years ago

My first arduino robot

This is a short video of my first arduino robot (he doesn't move yet he needs a little more coding :)

Posted by iman 9 years ago

Bohemian Rhapsody on old computers &amp; parts

Take 3 minutes from your busy schedule as soon as you can to listen to a collection of old computers and motors (a scanner, a hard drive, etc) playing Queen's Bohemian Rhapsody: the intro: "No effects or sampling were used. What you see is what you hear (does that even make sense?)Atari 800XL was used for the lead piano/organ soundTexas Instruments TI-99/4a as lead guitar8 Inch Floppy Disk as Bass3.5 inch Harddrive as the gongHP ScanJet 3C was used for all vocals."There are a couple blips and missteps but it's an amazing achievement anyway. Go! Now! Watch & listen!

Posted by rachel 9 years ago


Anyone out there no a way you can convert a 0.5HP electric single speed motor to a variable speed motor (if it can be done)

Posted by splott 10 years ago

PWM to Digital Signal

I am trying to make an R/C sumo bot for a competition. What would be the easiest way to run regular DC gearhead motors from a servo controller? I'm thinking of somehow converting the pwm signal into a digital signal that would run the motors forward or backward.

Posted by Stingray 7 years ago

web store in europe?

I live in Europe and i wonder if anyone know about a web store in Europe where i can buy buttons, small motors(1,5 watts), wires, and other things i need to build robots and program stuff

Posted by Knightkul 8 years ago

How should i go about making my Spring-Action Airsoft Pistol semi auto?

Okay so i'm suiting up my old Airstrike 240 pistol to be semi auto. Though i'm not sure how to go about this. I know i want it to be electric, powered by a motor, but i'm not sure which one i should get or if this is even possible. If someone can give me a wevsite i can go to to look at motors i can figure out how to install it. Thanks.

Posted by Falco544 7 years ago

My First Arduino Object Avoiding Robot!!!

Hey guys I am making my very first robot and have been researching for a while now......i have the parts but i am blank on what to do with them. I have:  2 DC motors 1 Ultrasonic sensor Arduino Uno 1 L293D (IC) 1 breadboard jumper cables 1 mini servo a power source for 4 AA batteries Robot chasis I want that the robot goes front and stops when object is near then looks right and left and moves accordingly..... Now keep in mind that i have 2 DC motors and NOT SERVOS so how should i program this or connect all the parts so that it works......PLZZZ do help its urgent.

Posted by mani_97 3 years ago

Table Fan Motor for Motorized Bicycle

Hello everyone, I was think of turning a normal bicycle into a motorized one. Will taking the motor from an ordinary Table Fan and attaching it to the bike work? I'm planning on running it off a car battery. Any suggestions are welcome :D

Posted by naresh97 6 years ago



Posted by maeku 7 years ago

Electric motor

What would cause an electric motor, running a table saw, to suddenly start running at a faster speed than normal?

Posted by tablesawguy 4 years ago

Motor Driver IC Blown up. Wish to know what went wrong

I am using 11.1V 25C 3700mAh Lipo Battery for powering up Motor driver Card (Dual DC Motor Driver 20A) Motor driver Product Link: . Basically, I tried connecting two motors instead of single Motor on each motor port on the driver. So in all 4 DC motors connected as the motors had no load. As per my calculations, all 4 DC motors together cannot draw more than 4 Amps of current. DC Motor Specifications 10 RPM High Torque Dc Motor. Link : During this check I noticed that one of the IC LR 7843 on the motor Driver Card got burnt, the moment I powered it up with LiPo Battery. Really don't Know why this happened.... Can someone please help me....

Posted by iaf64 2 years ago

Stepper Motor as a 'normal' motor

Hi, I recntly took apart a hard drive and there is a 7200 rpm motor inside. Only problem is that it is a stepper motor and I don't have any equipment to drive stepper motors and buying stuff to do is err... cost prohobititve.  Would connecting a negitive wire to 2 of the terminals and positive(in sort of a crisscross pattern e.g. -+-+) to the other make it run like a regular motor? I just don't want to invest time  to solder it only to have it not work.

Posted by ChickBang 1 year ago

Regarding motor controller selection.

I need a motor controller for 24V, 20A Actuator. The motor controllers receive 16V from battery and also had to boost the voltage to meet actuator specifications. Can anyone help me finding a motor controller of such sort?

Posted by GamanM 1 year ago



Posted by dellmang187 8 years ago

stuff to do with motor

I have an old vacuum motor that is really fast but don't have anything to do with it.  Any ideas?

Posted by H20 8 years ago

DC motors & stepper motors

I have 13 stepper motors and 10 dc motors for sell. I just have way too many laying around. I would like to sell them all for 40 dollars shipped using paypal. I'm hopping to sell them to help fund my CNC project. I also might be adding more motor as I find them.

Posted by r1dd1ck913 6 years ago


Dream Box of Goodies? I have a box full of circuit boards, motors, gears, lasers, power supplies, LED displays from several VCRs and DVD players, as well as internal parts from a DirecTV DVR with Tivo (not including the hard drive). All circuit boards contain chips, resisters, capacitors, etc intact on the boards. If you have interest in this or can point me to a place where I can get some value out of this lot, please let me know. Would most like to sell all together, but will consider selling piece-by-piece. Or maybe someone could direct me as to what parts to salvage. At this point, I have removed the boards and mechanics from the the enclosures in order to save space. I have recycled the steel/plastic enclosures. I am in the Dallas, TX metropolitan area. I would appreciate any offers or constructive advice.

Posted by aw0 7 years ago