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 11 years ago  |  last reply 11 years ago


Ok so i have a little problem here... i want to make a little electric motor go forward and backward by pressing a single button for each move (so 2 button in total) i got a little image ( poor quality i know but youl get the point) of what i did but its doesnt work :/ thx

Posted by koax 11 years ago  |  last reply 7 years ago


Alright i'm converting this old vex system into a rc car and the motor has and idle speed that can be controlled with this small potentiometer and when i turn it so the idle is off when i use it (i use it for steering) and when i use it the idle turns back on and iono what to do any ideas i tried using a resistor but it leaves too little voltage for the motor to turn the steering arm well

Posted by lightpacker 10 years ago  |  last reply 10 years ago


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 2 years ago  |  last reply 2 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  |  last reply 6 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 2 years ago  |  last reply 2 years ago

Sensitive Motor?

Im looking for a small, no bigger than half a roll of quarters, dc motor that can be programmed to spin 50ths of a turn. it needs to have some power and not be super expensive, thanks for the help.

Asked by theboygenius 5 years ago  |  last reply 5 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  |  last reply 4 years ago

Motor Question

I have two motors I am using as wheels, but they both spin in the same direction making my robot spin in circles. Can I change the direction a motor spins? Maybe by switching positive and negative sides?

Posted by Soileau 11 years ago  |  last reply 11 years ago

electric motors

I am considering motorizing my bike for my work commute. However I don't have enough knowledge about motor output as in torque / rpms to be able to determine what kind of characteristic I should be looking for. For many of the electric motors I am finding online, it doesn't really say the torque output. Is there a spec such as watts that I can judge a motor by? What specs should I be looking for in a motor that can assist in moving my weight. Or an links to good knowledge sites would be great too. Thanks.

Posted by aeneas shrike 10 years ago  |  last reply 9 years ago

Inchworm Motor?

Is it possible to build an inchworm motor? Or does such a thing exist where i could hold it in my hands?

Asked by lutziepv08 9 years ago  |  last reply 9 years ago

ac motor?

 i have an 3 phase motor with high and low voltage 3/4 hp 3450 rpm, voltage being 208,220,440  first time learning about wind power.Would i be able to use this for wind power generator

Asked by time out 9 years ago  |  last reply 9 years ago

Motorized bike

Hello, I have two motors and a battery out of a power wheels truck. I was wanting to mount it to my Chopper bike. Has anybody  done that and if so give me some advice P.S.  My bike has no gears and it has no pedal brakes.

Posted by MetalManMustang 7 years ago  |  last reply 7 years ago

Motor As Input?

I want to use a hobby motor with arduino as input , do I connect it directly or I need some circuits? Thanx In Advance!

Asked by Bot1398 6 years ago  |  last reply 6 years ago

knex motor?

Can any one show me how to make a super fasr motor useing nig yellow gears? pease make a stand too

Asked by knexinventer 7 years ago  |  last reply 7 years ago

need motor

Hi. I was wondering if anybody in the hutchinson, kansas area would have an old motor. preferably 2 cycle and running, but anything will do. thanks

Posted by the mechanical engineer 8 years ago

Universal motor

After disassembling a hedge trimmer I have obtained a universal motor (meaning it can run on either ac or dc) It has a power rating of 400W, and a label indicates that it has 1/2 horsepower. Does anyone have any ideas as to what to do with it? it's fairly small (15cm X 5cm X 5cm) and in reasonable condition. Thank you for any responses.

Posted by csharpdeveloper 10 years ago  |  last reply 10 years ago

Pager Motors

Is it possible to buy a pager motor, rather than ripping it out of an old phone or pager? If so, where would I go? (And if not, where would I go...)I'm looking to build a vibrobot, but don't have the motor. Alternatively, is their something else I could use instead?

Posted by threecheersfornick 10 years ago  |  last reply 7 years ago

Stepper motor

I have a small size sanyo denki 103 series stepper motor. I wanted to use it using L298 driver. What will be the connections  

Asked by UsmanR1 3 years ago  |  last reply 3 years ago

Slowing a motor

I have a 4 Watt mains powered motor that currently spins at 1.6-1.9RPM. I need to find some way of slowing it to maybe 1 revolution every 10 minutes. It's all sealed in a metal case and connected to the mains by a standard plug. I really need to find a way to do this without breaking it apart stuff as it may need a safety test later, I looked at dimmer switches as they essentially limit the voltage and are a max of 300w. Like this - I realise that they are made for lights but it's a similar principle and is only about £6. Would this work? Are there other options if I don't want to break into the motor housing or wiring? Thanks.

Posted by happysnail 7 years ago  |  last reply 7 years ago

Motor controlers?

I have a 24 volt motor from an old mobility scooter and I want to control it with my arduino but I have no idea what motor controller to use. I presume that I will need to use PWM to control it but what hardware to use I have no idea. Any help I would really appreciate. Thanks

Asked by cheesemarathon 6 years ago  |  last reply 6 years ago

Motor Controller

Dear Sir, Can you help me in developing a 24/36 mosfet controller for tricycle? Regards P​

Posted by hgsan 5 years ago  |  last reply 4 years ago

Green Motor

Hey, i am not good at electronics, but heres the idea: i have "planned" an energy saving motor. Anyway there would be a motor, say, driving a bike. The on the wheel's gear we could put another motor, which is for producing electricity. I am not too sure, but i think it produces AC current. But we need DC to drive the first motor (the one moving the bike). So hook up an AC to DC converter to the second motor (the one producing electricity). Then hook some diodes to the wires connecting the first motor from its power source. I think the wires going out from the power source needs diodes, too, since it allows current to flow in one direction (technical term called forward biased? ). To prevent the first motor driving the bike from "burning", a voltage regulator and a current regulator should be needed, right? That's basically the plan. I would be glad to be corrected if i got anything wrong. Thanks.

Posted by J50Nunlimited 10 years ago  |  last reply 10 years ago

Rugged motors?

Does anybody know of a source of motors that are rugged enough to survive long-term* on the surf-line of a beach?  They wouldn't need to survive flying rocks, but saltwater and sand proof would be good. The plan is to use them in reverse, as generators, so DC is preferable. *In the first instance, "long term" means "more than half an hour".

Asked by Kiteman 6 years ago  |  last reply 6 years ago

Dryer motor

Alright folks, after my last posting of the washing machine motor failed to prove helpful, ( because of my lack of understanding, not the help offered, that was excellent ) I decided to scrap that idea and start anew, this time with a dryer motor. I have a motor here now that like before I simply want to be able to start and stop at will. This time around I have the original wiring diagram too! So, my question is how do I wire the thing, simply with an on/off switch? No variable speeds, no reverse directions, just on/off. Oh, and Id like it run on 110v as well.

Posted by kithso 10 years ago  |  last reply 7 years ago

Stepper Motors..

I recently pulled two stepper motors out of a working IBM dot-matrix printer. One larger, 3v one with 1.8 steps. The other is a smaller, 9.5v one with 7.8 steps. I am more interested in the large one right now. I managed to find out that the large one has center-tapped coils. I also found out that Coil 1 is red-white-brown, coil 2 is blue-black-yellow. I found the schematic below on was wondering how this could be adapted to control my motor from a PC program with the ULN2003 (that chip sounds like UT2003)? Here are the complete residences of what I found on the wires with a multimeter, in case that helps. Resistances:Red to Brown: 8 ohms (or 7 some times)Red to White: 4 ohmsWhite to Brown: 4Blue to Yellow: 7Yellow to Black: 4Black to Blue: 4

Posted by l0cke 11 years ago  |  last reply 11 years ago

servo motor

Ok i was wondering if anyone can send me a parts list and very detailed directions and how to make a compact servo that i can make lift 150lbs and yes i know its a dawnting task  but i have fait in yee becuz idk how to do it myself :\ but whom ever does this will be listed on my finished product and credited on my product thank you and good luck :)

Posted by prini 6 years ago  |  last reply 6 years ago

Brushless Motors

I have a few fans around from computers. Seems that 3 wires is pretty common for these. I wasn't sure which was what, so, I figured "nothin to lose" and hooked up the right voltage across 2 wires. My guess was right. It ran. But, having 1 out of 9 fanblades busted off, it shook a bit. So, I busted off 2 more blades to balance it. But now, even connecting it the same way, it doesn't run. So, how should a 3 wire brushless motor fan be wired?

Posted by Toga_Dan 4 years ago  |  last reply 4 years ago

magnet motor or not ?

Is an angle grinder motor a permanent magnet motor or not ?,

Asked by nicobotha12345 9 years ago  |  last reply 9 years ago

Motors and servos

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

Posted by ijem 1 year ago  |  last reply 1 year 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 5 years ago  |  last reply 5 years ago

wireless motor

How may I construct a circuit so that I can trigger a motor from a distance wirelessly.

Posted by pro2xy 9 years ago  |  last reply 9 years ago

stepper motor

Wondering if any one knows how to control stepper motors via Hand wheels. By rotating the wheel you should be able to control the rotation of the wheel either clock wise or ccw. I do not want to interface the motor through a computer.

Posted by rajivraj 10 years ago  |  last reply 6 years ago

DC motor

I had a 220v angle grinder. It was burnt. I take the rotor of the grinder out. Its completely fine. Now i make a DC motor using this rotor and magnets(for field current). My question is, how much maximum DC volts this motor can take to get the maximum RPM. Because the motor was 220v AC, Will it run on 220v DC?

Asked by Shezi007 10 months ago  |  last reply 10 months ago

Motorized tablet

Hi I want to put my nexus 7 into my car but i need to access to my factory radio behind my tablet. So i think about making motorized panel like this : But i don't understand how make that ? What kind of motors  ? Actuator ? Thank !

Posted by Hydr0 6 years ago  |  last reply 6 years ago

dc motors

Hi: Can anyone tell me why my 24volt dc motor which I just got rebuilt will only work on 12 volts and immediatly overheats and stops with 24 volts? Thanks, Royal

Posted by cra 9 years ago  |  last reply 9 years ago

Motor Acquisition....

I have recently come into possession of a working vacuum cleaner motor (generic: only says 60 hz, 120 V on the side) with cord and switch still attached (also the fins on the motor that created the suction). I can't even find a manufacturer logo on it. Anyways...I am looking forward to using this in a future project. Just as an exercise, in case I am "thinking too small" what would you do with such a motor? It looks a LOT like this one:

Posted by Goodhart 11 years ago  |  last reply 11 years ago

Clockwork Motors? Answered

I was recently in the mood to make a small robot from scratch, however i wanted to be creative and make a clockwork motor as the driving force behind it. however, i do not know how such a motor functions, nor do i have any idea how to create such a device. also as a secondary topic any knowledge on where to procure gears of all shapes and sizes would be highly benificial to this and other projects i have in mind.

Asked by Oddmanout06 8 years ago  |  last reply 5 years ago

Electric Motors?

Can a 3/4 HP electric motor ( from an old garage door opener ) have enough power to be put in a bike and get at least 10 MPH out of it. Also what batteries should i use, i think i have an 18v or 16v battery somewhere..

Posted by Katarukito 10 years ago  |  last reply 10 years ago

Motor Clamp

I am extremely close to finishing Grathio's Secret Knock Detecting Door Lock ( I am about to mount to my door, but unfortunately the clamp (step 3) has not been working out for me, and in no way will the motor be strong enough to turn the lock. Any other suggestions on how to hook up the motor to the door? FYI: my casing is entirely different from that of his instructions. Thank you!

Posted by KGuy 5 years ago  |  last reply 5 years ago

DC Motor

Hi Guys, I have a 15.6 volt dc motor taken out of a handheld vacuum cleaner. is this suitable to use in a small wind generator as a project with my kids. when i attach it to a power drill and spin it from the shaft i dont seem to get any power generation. If i connect it to a 12v battery is spins real fast. any help would be appreciated sam

Asked by sam301 6 years ago  |  last reply 6 years ago

Lasers on motors

I am trying to create 8 motorised lasers that move (ideally randomly) between a 135˚ angle. I doubt with my level of knowledge i will be able to make them move randomly but if i can't just moving back and forth between the 135˚ would have to do.These motors would have to be reversable and travel between 2 points making an arc of 135˚, I'm looking at making this in the cheapest way possible. By mounting cheap pen lasers onto mini motors and somehow getting them do this. I will need to see the beams of light so unless i can find a better way to used focused light cheaply, i'll have to use a smoke machine or something. Having no real knowledge of this, would it be easily achievable, i would use a microcontroller to make the motor movement random within that 135 degrees but i have no idea how i'd go about it.

Posted by happysnail 8 years ago  |  last reply 8 years ago

bicycle + motor

I want ot make a moped, but theres NO WAY im buying those expensive mofo, kits for $200 when i could just as easily build one, i figure all it needs is a motor of 50cc or less(state law says)i figure, a weed wacker is usually ranged from 20CC to 50cc ill try that but so far the most i have found is 32cc, i also figure it will require a chain and a drive train which i can fabricate from another bike. i hear chainsaws are very powerful like 40CC + range which sounds good but im just not sure about de-constructing one of those, if anybody has had any experience with motor bicycle please help

Posted by Rotten 11 years ago  |  last reply 11 years ago

Motorized Futon?

I'm not sure if this is the right forum, but I was just tryin' to see if I can find some help for some questions I have.The basic story is soon my brother's moving back into my house, limiting me to one 9x10 room rather than the two I have now. I wanted a futon, but I like building things and creating things, so I thought I'd build my own. Then I thought I could motorize it.The concept is the same concept as the automatic windows on many modern cars. Press the button once, the motor goes until it's at the end, and a relay switches and it stops. Simple enough, right?I'm just not sure which parts to use. I saw this, and thought it'd be enough. I think I did the math and it's something like 150-ish pounds per second [torque](referance: )I'm not sure if that's too strong or not strong enough-- or if it'd even work!Now, I already have the design all set out, I know how I can get the futon to work, and the tracks and everything. For the relay, I was thinking of putting 2 metal plates at each end of the track, attaching the metal plates to springs, so once the motor pushes against it, it hits a relay and shuts the engine off.I'm just not really sure how to do any of this. Not really sure what relays I need or anything like that. Any help would be nice. :D

Posted by IDSKoT 10 years ago  |  last reply 10 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 7 years ago  |  last reply 7 years ago

Normal motors working as a stepper motor?

Hey folks, I have an arduino(Also l293d motor control) and I was wondering if I could use my normal motor just like a stepper motor by creating a funtion and using "delay" as a mode to control the rpm of the motor

Asked by cthaliyath 5 years ago  |  last reply 5 years ago

Do PMDC motors and SWDC motors require different motor controllers? Answered

I'm looking to run two Etek-R PMDC motors from one 700 amp controller. Will a GE series 700 amp controller work? Upon calling the company that offered it today I received-- through proxy-- the response that the compnay carried no permanent magnet controllers. Is there a difference between pm and sw controllers? I was under the impression that both required the same type of control: varying voltages. could the company have confused permanent magnet with pulse width modulation? any explanation is greatly appreciated!

Asked by gruffy 7 years ago  |  last reply 7 years ago

How to monitor the current of the motor (stepper motor)?

Or is there any current sensing device or module available in the market? I want to monitor the the current [ from +ve terminal of the power supply to motor ] and the current [from motor to -ve terminal of the power supply]  please suggest me any method to follow or is there any circuit module or device is in the market. so that I can buy and use them into my project to achieve this goal.  Thanks.

Asked by FarhanM6 3 years ago  |  last reply 3 years ago

how to fix motors?

How make motors run better

Asked by walkman616 9 years ago

Low Speed Motor?

I want to make a baby night toy with multi color LEDs and a rotation device. For which i need a low speed motor. Can someone help me find such a motor or give any idea on how an ordinary motor can be used for this purpose? thanks in advance for all the feedback.

Asked by muhammajunaid 7 years ago  |  last reply 7 years ago