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How to build a motor reverser?

I have computer fans that I use as fume extractors when I solder. I would like to know if there is something that I could build to reverse the direction of the fans.  On a slightly related note, I have a netbook cooler with 2 fans in it. I have tried reversing the polarity but they won't spin the other way. Can someone help? There are no diodes in the circuit, I have checked. I think it's because the fans can only work if hooked up properly, can someone confirm?

Topic by Wally_Z    |  last reply

Timed control board for a reversible motor

Hello, In need to connect a control board to a reversible motor so that the motor would rotate in one direction for "x" seconds and then automatically switch and rotate for "y" seconds in a reverse direction. I got the following parts in hand: - reversible motor -;=1 - control board -;=1 - DC adapter -;=1 Control board works and is going through the proper cycle as indicated in description however the motor only rotates in one direction and never switches. Realizing this this something that I am doing wrong with wiring, so hoping for an advice from someone who knows better in terms of how to set it up correctly and which jumpers or anything need to present so that it works and where things should be wired into. I am also attaching an image with descriptions for connectors that I received from the company. Thank you in advance for your advice.

Topic by dxbxlx  

Self-Reversing Electric Servo Motor?

Is there a circuit that can change the rotation direction of an electric motor that's cheaply and easily?

Topic by lupinesoul    |  last reply

DC Motor Stop and reverse for a feeder

Hi, I attempting to design a feeder that will raise and lower an access door to where the feed is at. The door will open at dawn and close at dusk. I am trying to design a setup similar to an automatic car antenna. When enough light hits the photocell, the motor engages, travels a distance or hits resistance and stops. When light is no longer strong enough, the motor engages in the opposite direction and after the same distance or it meets resistance, stops again. Is this possible to do without Arduino as I am trying to keep this cheap? If so, what do I need and how can this be accomplished? The photocell is not a requirement as I have seen astro timers that can adjust for the changing sunset and sunrise times. Please help. I've got at least 20 hours of research into this and am hitting dead ends searching forums. A circuit drawing would be an awesome addition!!!!!!!!!!!!!!!! Thanks in advance

Topic by tincupchalice    |  last reply

wiring diagram for single phase, reversible, 120 volt motor on a Cutler Hammer 9441H37B "O" controller?

I am restoring a 1935 South Bend 16 metal turning lathe.  The original motor was a three phase 480 Volt reversible motor which was operated by the Cutler Hammer 9441H37B  "O" series controller.  I do not have three phase electrical power at my current shop.  I do have a new 110/220 volt, 1.5HP, reversible motor on hand and would like to control it with the current C/H controller and utilize the reversible option on 110 volt power.  I have wired the motor once and it ran well and reversed, however, the motor heats on one end after running for a few minutes.  It is possible I have either a fault in the circuits or I think it is more probable I have wired the motor so that the starting circuit remains energized which would also cause the heating after a few minutes of operation.  I need to know a method or determining the correct wiring diagram for the combination.   There are six wires on the motor, (T1) blue, (T2) white, (T3) orange, (T4) yellow, (T5) black, and (T)8 red.  There is also a grounding connection which I have connected to the gounding connection of the controller. The controller knob has three positions, left, center(straight up) and right. The continuity of the controller connections is as follows; Left Position of controller knob     Center Position of controller knob     Right Position of controller knob (I do not know whether the left or right position of the knob is forward, since the lettering is worn away)  9             8              7                             9              8             7                    9              8             7  6             5              4                             6              5             4                     6             5             4  3             2              1                             3              2             1                     3              2             1  Knob end  (left position)                Knob end  (center position)                  Knob end   (right position)    Continuity of controller                     Continuity of controller                        Continuity of Controller         7, 8, 6                                                    7, 6                                                     7, 5, 6         4, 5, 9                                                    4, 9                                                     4, 8, 9         1, 2, 3                                                    1, 3                                                     1, 2, 3

Question by girural    |  last reply

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".

Question by Kiteman    |  last reply

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.

Topic by kithso    |  last reply

How to reverse the rotation of a vacuum cleaner motor? Answered

I'm possession of a vacuum cleaner engine and I'm trying to reverse its rotation..So far I've tried reversing it's polarity with no success but I looked up the 2 ICs on it's chip and it has a555 timer and a 7-stage binary counter.(see: are only 2 wires running to the engine from the chip so I presume there is no feedback.Furthermore there is a potentiometer hooked up to both the ICs which regulates the speed of the engine (and no AD convertor as far as I can tell) so the voltage changes the PWM output as the engine is rated 230V.All ideas are welcome =)p.s.(I can't supply you with pictures right now, sorry)

Question by Prodigity    |  last reply

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.

Topic by happysnail    |  last reply

Is reverse engineering illegal?

Is reverse engineering illegal? Well, if you then go on to sell your version? For example, in an upcoming instructable I'm modding some electronics, well, without revealing my instructable here's an equivilent example: Lets say I buy a little robot at the store, it has motors and the case and everything. Only problem is, it runs on AA's and you want rechargable batteries. Also, the wireless module for some reason is external and is super ugly and annoying. You crack open everything and you find that the needlessly large circuitboards only have about 20 (somewhat) easy to find components that adds up to like 2 dollars. Following traces, you recreate a schematic from the PCB (already did this, that was fuuunnn :P). Now you reengineer the board (still same schematic) so that it's much more compact, you've added a little charging circuit (and correspond boost circuit, replacing a couple of AA's with a lithium ion), and you made it all fit inside the robot (no wireless module just hanging around outside the robot. Now, essentially the schematic is the same, but you've added stuff like the boost circuit and charging circuit. You've also added a few customizing features that make it more special (adding LEDs, microcontroller, cough cough etc.). Would it be illegal to sell a board/kit (incase other people want the board and can't solder smd to good) for people to modify there own robot (same model etc.). Also, the schematic from the reverse engineering is very similar to an example circuit in the main chip's datasheet, and a few other parts are common sense (like some resistors here and there, LEDs, a few extra filtering caps), so the company's circuit is nearly identical to the datasheet, is this illegal to sell?

Topic by guyfrom7up    |  last reply

Need a timed reversible DC motor with either a string or rack and pinion.

Originally this was a way to cheat a video game.  But it kills two birds with one stone.  I get what I want in the game and I get to learn about electronics/robotics... I want to create a device that will lower a stylus to touch the screen on an ipad, then lower another stylus to touch another part of the screen.  Then 6 seconds later repeat. I thought to use 2 timers and 2 DC motors with either string attached to a spool attached to the styluses OR a rack an pinion set up.  But I don't know what type of timer I need, or how to make a switch to reverse the direction of the motor...  Thanks so much in advance! J

Topic by BANTAR1000    |  last reply

How to reverse polarity digitally (with software) ?

I would like to get a DC motor to spin in one direction for a specific number of rotations and then spin in the opposite direction for the same amount of rotations and continue to do this automatically? I know that changing the direction of the motor is achieved by reversing the polarity from the power supply, but how can this be done without using a switch or potentiometer or any other piece of hardware? I am new to this stuff so any help is much appreciated. Thanks

Question by luch    |  last reply

Reversing Direction of Power Tool

It would be nice to be able to reverse direction of angle grinder, mototool, and similar tools. Sparks may be flying toward ones face in certain positions. The tool also may also tend to kick due to wheel direction. These tools arent made to reverse. How can one change this?  How can one keep the wheel from unscrewing and flying loose once the motor is reversed? 

Topic by Toga_Dan    |  last reply

How to wire a Battle Switch for forward reverse of a motor?

I am having a problem with getting this switch to run a motor in forward and reverse. The wiring diagram is in the picture, but i will describe it here also. There are three leads (s1 for +, s2 for motor -, and s3 for battery -). For the s1 the same positive lead is attached to the motor and this pin, leading to the problem that if I use two to fun the motor each way then there is a constant open connection to the battery. The only way I can think of to fix this is a diode to keep the flow from going up the way it is not supposed to. If you have any other ideas or if this is not warranted I would like to know, these are expensive switches and i would hate to burn one out on a stupid mistake. Thanks in advance.

Question by zootsuitman  

How to wire a reverse polarity switch

I have an old Rascal 600 scooter that has a seat actuator that will go up but not down. I have tried to find the problem but can't.  It will operate up and down early in the morning when it is cool but later after it warms up it will only go up. I want to wire a reverse polarity switch directly from the 23VDC system(2-12 volt batteries)to the actuator motor. The actuator motor is 24VDC 12.5 AMP. It has a compression load of 600LBS. The motor has a black and red lead. Please include the size or sizes of wire I will need.  Also please be as specific and simple as possible. A drawing would be especially helpful. Thanks a million and God Bless!

Topic by themanpan68    |  last reply

How does one wire a motor so that it reverses automatically?

I'm looking for a relatively simple, mechanical way (by that I mean not using a micro-controller) to wire a motor so that it will reverse direction without being switched manually. The interval is unimportant, and the purpose is to have two spools connected by a loop of string (think reel-to-reel), one of which is controlled by the motor. A low-tech solution would be awesome.

Question by brandegor    |  last reply

Does anyone know anything about reversible induction motors?

 I have a squirrel cage motor from a tumble drier and don't want to wire it up wrong!  I studied the timer switch and it looks as though there is a main power wire which is on most of the time, and this would periodically disconnect and another wire would briefly be connected instead.  I assume this reverses the direction.  I haven't switched the motor on yet, but if it turns out that it starts in a random direction, is there a way to guarantee it will always go one way? TIA, Throbscottle

Question by throbscottle    |  last reply

is there a way to use a joystick from a ps2 controller to move a rc motor forward and reverse ?

 i just wont to know if i can use a  joystick  for forward and reverse on the motor i put a picture of the sort i meen  like useing it like a dtdp switch its for a electric telescope focuser im making i have it set up mag with 2 microswitches for forward and reverse but just wanted to see if i could solder one of the joystick in place and not the microswitches and without a  arduino if anyone can help that would be great thank you  

Question by swilliams66    |  last reply

12V DC Diagram that shows a motor reversing on its own?

So I made this moving remote control target system. I used a treadmill Motor to connected to RC car speed controller with a radio receiver. Works good but now I want to up grade I'm new to electronics and have a basic idea. What I want to do is have the motor hooked up to a speed controller and  run till a certain point then reverse. the opposite direction. I know limit switches are incorporated some wear any one have an idea how the diagram would look thanks

Question by unshiftedmatt    |  last reply

How to add reversible dc motor to cheap rc car?

I have a cheap Rc toy car that I was going to hiack the turbo pin to get another channel. I want to make it into a tow truck and use this extra channel to operate the winch. BUT I have to be able to reverse it. Giving up and down for the winch. Can it be done?

Question by HamishM15    |  last reply

Electric motor running backwards

I have an electric motor on a large Hobart vertical mixer 80 quart.I had the brushes replaced and put it back together It now runs in reverseIt is a single phase motor with four brushes that have no power to them there is no capacitor eitherIt is an old style motorAny help would be greatly appreciated even what type of motor this isThanks David

Question by David Ferguson    |  last reply

Have a timed switch on motor ?

Hello, Im very new with electronics and im working on a project, but I need to make a motor go forward then after a few seconds reverse and so on. I found this tutorial which is great but it uses a manual switch. Does anyone know how I could make this so its timed to switch? thanks

Question by william1092    |  last reply

L293D with 12V motor issue? Answered

Hi,All Now i wanted to control a 12V motor with a L293D purpose is to make the motor go forward and reverse with the control of Arduino.I got a wiring from internet.but I think is incomplete wiring.the arduino uses 5v power rail and the motor uses 12v power rail.from the wiring i cannot find the GND with the 12V strange.i want to know how the 12V rail GND wire goes? Shanno.G

Question by gada888    |  last reply

DC Motor Control Help?

A very long story short, I desperately need assistance in knowledge with some motor control. I need to control 2,DC 6v motors with encoders that include 6-pin 2.0mm pitch PH JST cables that break out motor inputs. The bottom line would be what do I need to control these motors, to go forward and reverse, and operate it from a wireless controller? I appreciate any and all help! Also, this is our motor:

Question by NickWeav    |  last reply

how to control DC motor go forward, reverse and stop with IR sensor?

Hello to use arduino, i am trying to control DC motor via IR sensor, but  i have no idea how to coding the source put in the conditions the conditions are under parts - 1. arduino Mega 2. IR sensor 3. DC motor 4. L298n(motor driver) Current state  = DC motor STOP / IR sensor ON --- CONDITIONS --- 1. IR sensor - no detected - DC motor Stop 2. IR sensor detected - DC motor go forward(set time) - STOP - IR sensor no detected during (set time)- DC motor reverse(set time) - STOP 3. IR sensor detected - DC motor go FW(set time) - STOP - secondly, IR sensor detected - DC motor reverse(set time) 4. During DC motor go forward, IR sensor detected sencondly - DC motor reverse(as time go forward as ) - STOP another example 1.  - IR - detected - DC motor FW(4sec) - STOP - IR sensor no detected untill ( 25 sec) - DC motor RV(4sec) - STOP 2. IR  - detected - during DC motor forwarding ( 2.4 sec) - IR sensor detected - DC motor reversing (2.4 sec) - STOP 3. - IR - detected - DC motor FW(4 sec) - STOP - (after 18 sec(less then 25sec)) IR sensor detected - DC motor reversing (4sec) - STOP  

Question by 승주권    |  last reply

Controller for regulating the speed and reversing the spin of AC motor at set intervals?

I would like to build a roller base that requires constant spin, and intermittent reversal of spin direction. In addition, the spin speed should be controlled so I could tune in different rpms ... eg range from 10-100. I am totally new to electromechanics and I do not know where to start. Just buying a motor and connecting it to AC should not be a problem, but the additional control seems tricky.. How can I control the spin/rpm of an AC motor, and how can I reverse the spin direction at controlled intermittent times? 

Topic by l2oBiN    |  last reply

Motor triggered by a vibration sensor

Hi, my project consists of a vibration sensor that, when enabled, will trigger a motor which will function for a certain amount of time, then stop, and stay in this position as long as the sensor is detecting vibrations. When the vibrations stop, I need the motor to reverse polarity and function in the opposite direction,for the same amount of time as before then stop, and repeat... I'm a first year electrical engineer so please consider me a rookie in this field. If someone could provide me with a suitable electrical circuit, with names and values for the part, i think i might be able to draw the corresponding board. Thanks

Topic by julienfhd    |  last reply

Synchronous AC110V Motor Question

I have a small AC synchronous microwave motor that I want to use for a project. The problem is that even though it says CCW/CW, which i take it to mean counter clockwise and clockwise, it randomly seems to choose which direction it wants to turn rather than me reversing the current to change the direction. What makes this motor randomly choose a direction? Is it some internal component that randomly decides it's direction? Basically, is there a way I can make it go the direction I want? If not, can someone point out a small size motor type that is cheap and has a lot of torque? Thanks to anyone who replies!

Topic by rodneykristy    |  last reply

12v automatic lid opener

I have a dc 12v winch that I want automatically open a lid of a feeder at a specified time, remain open for a spercified time and then reverse the motor to close the lid for a specified time and the procedure will repeat itself  the next day. I have a timer that will work but I want the motor to reverse automatically.Any info appreciated. Thanks

Question by yulc    |  last reply

The Newman Motor Challenge !

I was recently approached by someone claiming the old Newman Motor wouldn't be good for anything.Well, I was a little bit offended by this as I already had my little toy version of it as kid.At that time though it really was just a toy for me.Critics still say the Newman Motor is nothing more than some interesting machine.And even the biggest followers will admit it is not a free energy machine, just a very efficient one.I experimented with, what some call fringe science, now for about 30 years.And it all started with math and my interest in unusual ways of dealing with problems.So what's behind the challenge?The original design was suprisingly simple as you can see in the above Wiki link.Just a spinning magnet in a (split) coil.What you don't find anywhere though is real details on the how to.Sure, you need to have some sort of contact linked to the rotation and timing is critical but what does it all do?You can build a drt simple model in a few hours with stuff you might have around already.Quite a few Youtubers are happy to share their creations.The actual challenge is to come up with what Newman really did inside his drum.And also why I think it is not the full potential his machine had.Build a simple Newman motor and check for how long you can let it run on a charge super capacitor.Then sit back and read some of the other magnet stuff I wrote.After that come up with a better design ;)I started to create some 3D models that need testing once I find more free time - should take some leave one day..But for those with little patience and an interest in the Newman Motor I decided to share my current idea:For some it might be really confusing although they know motors and magnetic fields.Those just playing with magnets might have it easier for once as they can pretend they followed my thoughts ;)The original design used two coils and a rotating magnet.If you consider how the magnet creates an electromagntic field in the coils then you have to wonder right away how it can spin.And most designs will indeed need a push start to get going!You can't have electricity produced without the magnet spinning and you can't make it spin without electricity!The current from the battery or capacitor can only flow at the short moment of contact on the axle.This moment needs to be timed "mechanical" as we don't want to waste any power on not required electronics.If you ever bothered to check the timing of a Newman Motor then you realised the collapsing electromagnetic field at the moment of contact actually is in reverse to what the manget has in that position.Unlike any normal motor it means the magnet produces most of the power the coil needs to make the rotor spin!So far for the well known facts, now for my fiction:I would like to call my version the Aussie Newman Motor as all things downunder are just different ;)Here are my current desing mods, that I freely share so everyone can benefit form many years of experimenting to save a lot of time.1. Instead of two coils a not-really-bifilar coil is centered on the axle.The coil is created like two stacked relay coild that have no bobbin and a "dint" to allow the axle to pass through.Without the big gap of the original less of the magnetic field strenght is lost and the coil is far closer to a homogenous magnet.2. The timing done by salvaging a simple DC motor's contacts and brushes.This allows for far higher currents and if the salvaged motor had enough poles also for a very short "burst".3. The axle contact is made with a cleaned steel bearing.After cleaning very conductive copper based lubricant is used in tiny amounts to prevent corrosion and provide a lower resistance.The clear benefit is that with the new timing system a lot more current can flow.Initial tests with a mock up model showed an increase in run time from the capacitor of about 15% already.With proper bearings and a salvaged DC motor I hope to reach 18 to 20% more than the original design.Now why the DC motor if a reed contact or hall effect sensor would be even faster and with less resistence?Neither can handle really high currents without additional electronics ;)Plus of course I wanted to leave the door open for the Aussie Newman Motor 2020.You might now say "Why bother if the above improvements are already so great?".If you followed my elsewhere for a while then you know the Newman Motor is only 2D but I prefer 3D or more harmony if you like.Right now the imagination of people re-inventing Newman's machine is limited.They try to get on the horse from behind - literally.Fancy electronics, machined parts and so on.But they never go 3D ;)You got it? :)There is only two coils!!The magnet rotates, same as the contact on the axle.One set of coils for each contact the salvaged DC motor has.Each set aligend to the corresponding contact.And now you will ask "How do you plan to connect that to a single DC power source?Well, that is why it will be the 2020 model - my time for tinkering is sadly limited because I still need to work to support myself.But if you consider that the original as a good model can run for over 10 minutes on a supercapcitor then ask yourself how long it could run on 4 or even 8 coil sets.And although there is no such thing as "free energy": There will be still space for more coils.Or other coils to just provide electricity that does not power the motor.Critics will now see their chance and state that if we add a load to these additional coils then this will cause a strain on the system.Of course they are correct here.If, however, the load is mechanical then the motor needs to supply basically the same additional energy.Plus all mechanical losses.The question is: How much mechanical load can we add before the motor is down to the same efficiency of a very efficient DC motor? ;)And what if our Aussie Newman 2020 would actually violate the laws of physics?We can calculate how much electrical energy would be required so a given motor produces a fixed amount of torque.Or we can just measure it, the beauty of science...We can do the same in reverse of course.Let's say a mechanical pump would require 500RPM and 100Nm of torque to pump 100 liters per minute.Then we could calculate what sized motor we need to drive the thing and how much power the motor would need.So again: What if the Aussie Newman 2020 would require far less than what science makes us think and still does this job on a simple 12V lead acid batty of 4Ah?Just saying... ;)I hope to have a presentable and working 2 coil system by May, so stay tuned!In case you are faster or even beter then of course feel free to show off your results or to post a link to your Instructable so everyone can verify it.

Topic by Downunder35m    |  last reply

How can I using a MAME Joystick (Happ Joystick) with a reverse polarity motor?

I'm trying to use a Happ Joystick to control 2 reverse polarity motors. (But for this will just talk about one motor) If the joystick is pointing up the motor should go clockwise (+ -) If the joystick is pointing down the motor should go counter-clockwise (- +)I would like to use the Happ Controller because it's an 8-way joystick. Because of the happ joystick is meant to work, I know I need some sort of realy somewhere, I just don't know where. This will be connected to a 18 or 12 volt DC power supply. This is something very similar as the Simple wired 2 motor control joystick. But I'm looking for something a little more larger, robust, and can handle abuse. Thanks for any help.

Question by NateMac    |  last reply

Forward/Reverse engine using 2 micro pins - How?

I've been wanting to get into more advance projects after i've down lights, tunes, and other things. So first to mind, knex and motors. have tones of it. The only problem, How can i get a forward/backward on the engine, with just 2 micro pins? This is a normle + - motor.

Topic by Killa-X    |  last reply

How can I reverse the direction of rotation on an ac variable speed fan motor? (Lakewood Kool Operator Junior 8")?

Im trying to get an ac motor to go from operating clockwise to counterclockwise. Is this possible?

Question by TheSodaJerk    |  last reply

12 Volt Drill Motor Controller for 12v, 22amp 1/4hp DC motor

I need a motor controller which will produce variable speed, forward and reverse for a 12 volt , 22 amp, 1/4 HP dc motor. This motor has a reducer of 50:1. Is it possible to use a cordless 12 volt drill to achieve this purpose? If so, how?

Question by perhne    |  last reply

DC motor speed controller layout Answered

Alright so below is a quick picture i drew up of the circuit for an electric kayak idea i have. The drawing is just a rough mock up. I think I'm on the right track, but looking for somebody with more experience to double check it!   Really appreciate any help! Thank you! Below is the link to the PWM Speed Controller i plan to use:

Question by ScratchBuiltAircraft    |  last reply

would this work for a homemade generator?... like getting a dc motor and turning it in reverse ?

Instead of spinning the moro by connecting it to a battery spin it on the spindle that turns? would it work

Question by sharlston    |  last reply

autonomous car goes full reverse because of wrong initialization of ESC?

 Hi, I have a problem with my robotics project. I am building an autonomous car using a LiPo battery (2S) and a 15T motor and an Arduino board. I know that I have to initialize the ESC at the beginning of my code but for some reason, the initialization goes wrong sometimes. I don't know if my code is wrong or what. Sometimes the initialization is fine and I'm able to run the car, but sometimes it goes full reverse which is very inconvenient. These are the 8 lines of code I have to initiate the ESC:  throttle.attach(6);                                                        throttle.write(70);          delay(2000);               digitalWrite(6,LOW);       delay(1000);       throttle.write(77);       delay(1000);       digitalWrite(6,LOW);

Question by fevremartin    |  last reply

How many RPM does it take to reverse the process of a 1.5V DC Motor? Answered

I excavated a toy train and pulled out a 1.5V DC Motor. I have not found a use for its motion, so I was thinking of reversing the process and creating a hand crank flashlight. But should I hand crank? How many RPM would it take to generate its standard voltage? Thank you for your answers.

Question by DELETED_explosionist    |  last reply

How create a detailed motor controller using an arduino motor shield with the uno? Answered

Hi, i'm new here and new to the arduino. I am using an arduino motor sheild and the uno board to contol a 4v dc motor. I want to be able to make the motor spin forward as well as reverse the polarity and make it spin in the opposite direction. Also using four inputs, preferrably push buttons, I need it to increase the motor speed by 5%, decrease the motor speed by 5%, make the motor speed 25% of max speed and make the motor speed 50% of max speed. Code examples would be really helpful. Your time and help are greatly appreciated.

Question by beginnerbot    |  last reply

IS this circuit with PICAXE18-M2 driving a Motor correct ?

IS this circuit with PICAXE18-M2 driving a Motor  correct ? Im not sure if im doing this correctly, i went off an example. im trying to get the motor to go forward and reverse. Chips used: PICAXE18-M2 - SN754410NE- MC7806CT- LM340T5- i have attached the schematic and code below. if some one can please help me find out what i did wrong. thanks Code from PICAXE Program Editor symbol MF = B.4 ; rename output4 `MF- Motor Output Forward’ symbol MR = B.2 ; rename output4 `MR- Motor Output Reverse’ main: ; make a label called `main’ high MF ; `MF- Motor Output Forward’ on pause 250 ; wait (250 ms) low MF ; `MO- Motor Output’ off pause 250 ; wait (250 ms) high MR ; `MF- Motor Output Reverse’ on pause 250 ; wait (250 ms) low MR ; `MO- Motor Output’ off pause 250 ; wait (250 ms) goto main ; jump back to the start

Question by dudeitskumar    |  last reply

Need help with a Single Phase 1Hp dual voltage reversible motor. How to figure out which wire is which. Answered

My dad gave me an old but awesome table saw years ago and told me the motor turned the wrong way. Nomenclature tag states its a GE CAP motor (aren't they all?). I do have a tag showing the possible wiring connections. Shows it has NO overload protection. What I DON'T have are marked wires. I have 2 wires connected to L1. I have 1 wire connected to Neutral. I have 3 wires tied together. Any info I have found indicates this is wired for high voltage. I would like to run it on low voltage. I also don't know the rotation. So far all the wiring info assumes you have marked wires. I cannot find any info as to which wire goes to which coil, etc. How can I identify each wire so I don't "let the smoke out". I learned years ago motors run on smoke. Once you let the smoke out, they don't work anymore. Lot's of sentimental as well as practical value at stake here, not to mention a GREAT learning opportunity (as well as teaching).

Question by burnerjack01    |  last reply

How can i get a 12v motor to automatically reverse polarity or direction by a adjustable timer ???

I have a machine that i built for hunting that swims  duckdecoys back an forth that mimics a live group of ducks and would like to control it by an adjustable timer to automatically reverse the direction of the motor  instead of having to hit a switch back an forth.Heres what i need exactly a timer that is adjustable by a knob that will switch direction of motor after a certain time an adjustable speed control by knob for the motor to speed up an slow down the motor an a on/off switch to turn the system on an off if someone could help me with a parts list and a schematic of how it all goes im shure i can figure it out

Question by frankswamper    |  last reply

What would be an appropriate diode for a motor driver? Answered

I'm currently building a brushless motor driver, and need to get some diodes to go accross the MOSFETs to prevent the reverse current going through them. The absolute maximum forward voltage through the motor is 15V, at 25A, so do the diodes also need to withstand this, or can lower ratings, such as 10A be used. Thanks in advance.

Question by The Skinnerz    |  last reply

Convert NEUTON lawn mower to outboard motor

 Any thoughts on using a NEUTON lawn mower (36 Volt) to run an outboard motor? 1. Modding NEUTON to variable speed & reverse.  2. Remove engine from outboard.  3. adapt NEUTON motor to outboard shaft.  (The Neuton has the charging, easy battery removal/switching, circuitry)..... Thanks,  Jed

Topic by tabjed  

how to reverse the polarity of a DC motor using a DPDT relay, limit switch, and timer?

Ok, i am not an electrician and understand very little, but here's what i want to do.  I have a reversable 18V cordless drill I have taken apart to get at just the motor.  What I want it to do is turn on automaticallly with a timer in one direction and shut off (with a limit switch?) after about 2 seconds.  About 14 hours later I need the opposite action. Both actions automatic using a timer with AC power.  The application is a door opening and closing veritcally (chicken coop door).

Question by StevesBees    |  last reply

how can wire up my pan tilt motors( which are reversible dc) with the stop switches, ??? Answered

I recently bought a pan tilt head on ebay that did not come with a controller the motors are 12v reversing motors they work fine, it also has stop switches for pan and tilt. Ok so the stop switches stop the camera from going too far one or the other so when i wire them in to the power wire to stop the current when the camera goes to far that works but because of the reversing motor i cant use either switch to start  the motor again . what is the cheapest way to do this Thank you for reading.

Question by captainlee    |  last reply

Help with DC motor control circuit

I am looking for some advice in regards to a DC motor control circuit i am trying to build out of some electronic parts I have lying around. See attached control circuit diagram.  The idea is that a timer will trigger the relay to either run the motor in reverse at full voltage or it will run forward stopping and starting as per the wave form from the 555 timer. So on for about 2 seconds and off for about 2 seconds. This waveform can be changed using R1 and R2 which are trim pots.  The circuit works as expected until I hook the motor up. When the motor is meant to be following the waveform from the 555 it will actually stop and start very erratically. Any help on the reason for this would be great.  Also this is one of my first electronics projects and any feedback on my design would be appreciated. 

Topic by jmullo  

how can i run dc motor with specific criterias as per detail?

1) the motor should move forward for cirtain RPM then STOP when supply is on. 2) the motor should move reverse with exact same RPM then STOP when supply CUT OFF. the supply volage is 230V the motor is 12V DC.

Question by jdixit89    |  last reply