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[Ideas For Design]
Precision DC motor speed controller

W. Stephen Woodward  |   ED Online ID #6417  |   March 17, 1997


Optical tachometers that produce a frequency proportional to RPM are popular feedback sources for precision analog motor speed control. This usually involves a frequency-to-voltage converter (FVC) to convert the tachometer output to a voltage that’s then input to a conventional servo. Though it typically works fine, it’s unnecessarily complicated and requires a tachometer with a relatively high pulse/revolution characteristic to allow for both a reasonably fast loop response and adequate ripple filtering in the FVC.

The circuit shown circumvents those problems by replacing the usual FVC with period-to-voltage converter A2. The motor speed setpoint is adjusted with R1 as follows: The voltage on integrator A2 (Vr) is a negative-going sawtooth with slope given by Ir/C1. Ir = (V3 − V1)R1/(R2R3), so if 1/Fm is the period of the tachometer pulses, the peak-to-peak swing of Vr = (V3 − V1)R1/(FmR2R3C1).

During the positive half-cycles of the tachometer square wave, S3 connects C3 to A2 so that the voltage on C3 tracks the sawtooth. On every negative square-wave transition, C3 is connected to the summing point of A4. This happens in such a way that if Vr < (V3 − V1), then a positive increment of charge is deposited on the summing point. This tends to drive A4 negative and thus reduce the voltage applied to the motor, slowing it down.

By contrast, if Vr > (V3 − V1), then a negative increment is dumped onto C4 and the motor voltage and speed are increased. The net result is for A4 to converge on the single motor voltage that makes Fm = R1/(R2R3C1) because only then is Vr = (V3 − V1). Consequently, the equilibrium tachometer frequency and therefore motor speed is directly proportional to R1 and independent of the absolute values of V1 and V3, removing any requirement for precision voltage references. Only the stability of the ratios of R1, R2, R3, and C1 contribute significantly to the error budget of the controller. Therefore, Vs supply voltages from 20 V to 35 V give the same accuracy.

Dc stability of the controller is assured by the relationships derived previously and by the error integration performed by A4. But, as in all servos, dynamic convergence is another matter. Damping of the system response and stable, over-shoot-free response to perturbation are provided by the C4/C5 ratio and R4 x C5 time constant. The values for these parts, shown in the figure, worked well in the prototype. Different motors connected to different loads might require tweaking of these values. In general, the greater the C4/C5 ratio and R4 x C5 time constant, the greater net damping and tolerance of high load inertia.

One additional consideration is what happens if the motor stops and Fm = 0. Because the feedback path depends on charge transfers between C3 and C4, and since these transfers cease if Fm = 0, some means is needed to “jump-start” the servo. Comparator A3 does this by slewing A4 positive whenever Vr is allowed to ramp below V4. Accurate charge transfers in normal operation are promoted by the crisp square wave produced by Schmitt trigger S1.


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    Reader Comments

    can somebody help me???

    how am i able to control a wiper motor's speed??? i'm going to use it as the motor drive for my conveyor unit....

    Anonymous -July 23, 2008

    sir i would request you help me in getting code to input digital signal and based on the signal to output on ports. 8 input and 8 output.using a timer of 60 min to switch on a process. sir is it possible to start the process where it has stopped if power faiure. please help. regard.

    Anonymous -July 22, 2008

    Hi, I am using LMD18200 for my 24V,1A DC motor speed controller. I have noticed that when motor current increases the average voltage out1,out2 reduces so is it Rds(ON) increases with load which is not expected up to the normal output current limit.

    Jignesh Patel -July 22, 2008

    sir can u suggest me a project related to micro processor and motor for my final year project

    laxman -July 21, 2008

    thank you

    Anonymous -June 28, 2008

    i m going to bult a project in which i need microcontroller based speed control of stepper motor.

    Kalathitya Suresh H. -June 27, 2008

    hi please send me a bldc motor circuit controller using 89c51 micr for higher amp motor

    Anonymous -June 18, 2008

    we want a program for interfacing l293d ic with 8051,pls send me program and document of intelligent train engine project.pls send me soon. thanq

    lipika -June 03, 2008

    sir i am designing the dc motor controlling project with encoder feedback .So plz send me the encoder interfacing with 89c51 microcontroller.

    regards shankar

    shankar -May 26, 2008

    sorry for giving u a problem, can you share your circuit of PIC16F877a control DC motor speed and direction of motor with me? thank you ^^ I appriacciate your help very much .. ^^

    kelvin -May 18, 2008

    hello sir,I want to get information to SPEED CONTROLE OF D.C MOTOR WITH THE HELP OF CHOPPER. And also I want to get the corresponding CKT Diagram as necessar.

    chetan -May 07, 2008

    i am going to control dc motor with pic microcontroller......could u plz give me the program code for this project ......it is needed urgently......

    sohrab singh -May 06, 2008

    i want microcontroller base project all details for speed control dc motor

    Anonymous abhishek gamit -May 01, 2008

    i want to take readings of the high speed motor what logic i have to use for having the speed detection is there any spec data sheet for speed detection if possible be helpfull to me

    Anonymous -April 26, 2008

    To use the 555 timer for speed controll go to the following link: http://www.electronics-lab.com/projects/motor_light/038/

    Anonymous -April 24, 2008

    can anyone give me the circuit of connecting dc motor with AT89C51 and also its assembly language program

    Rajeev -April 23, 2008

    One additional consideration is what happens if the motor stops and Fm = 0. Because the feedback path depends on charge transfers between C3 and C4, and since these transfers cease if Fm = 0, some means is needed to “jump-start” the servo. Comparator A3 does this by slewing A4 positive whenever Vr is allowed to ramp below V4. Accurate charge transfers in normal operation are promoted by the crisp square wave produced by Schmitt trigger S1.

    SORRYPOEM -April 22, 2008

    can someone please suggest an application for dc speed controller...i am doing a project based on this using a 555 timer..

    jincy -April 18, 2008

    hello sir,i am in need of Assembly language program(ALP)for controlling dc motor by interfacing with 8086 microprocessor.....plzzzzzzzz

    Anonymous -April 15, 2008

    I am a engineering student from electrical stream.i want controlling of single phase motor with the help of 8051 micro controller .so,any one please send me tested circuit diagram and tested program.for this i will oblige.

    rajeev -April 13, 2008

    Please,if somebody have circut and program for 8086 that controll motor speed, can you send me to mail.Thanks lot

    hasanabosharfo@yahoo.com

    hasan -April 10, 2008

    Looking at these comments its pretty sad if your a senior engineering student, and don't know how to read a data sheet, understand a bode plot, do basic math to calculate motor speed based on pulses in a given period.

    And expect people to send you application specific implementations.

    Then again most of these people have Indian names.

    Anonymous -April 08, 2008

    hey plz send me coding in keil software for a dc motor speed control(PWM) using AT89C51 where l293d is used for interfacing motor to the controller ic...

    Anonymous -April 03, 2008

    hey,please send me coding for dc motor speed control using keil software where the motor is interfaced to AT89c51 controller using L293d H-bridge driver

    anusha -April 03, 2008

    Sir I have to control the speed of a dc motor by varying the pulse width. But this should be independent of load i.e. even if i vary the load the speed should be constant. Could you please help me how I can take the feedback from the motor and apply it as a feedback to the "pwm sped control of dc motor"? I will be very grateful if you can provide me a block diagram or circuit diagram. Thanks Sadek

    Sadek -April 03, 2008

    its urgent....i need program for bidirectional speed control of dc motor....

    rajesh -April 01, 2008

    I am a final year student,and I need all the various methods of speed control of induction motor by using PIC microcntoller based speed.thank you

    cyprien -April 01, 2008

    I need the requirements needed to implement the circuit of controlling the speed of induction motor by using the PIC microcontroller based speed.

    Anonymous -April 01, 2008

    I am E.E.E student. i need to documentation & C source code on DSP based speed control of BLDC motor. so i want the applictaions & source code. using tms320f240. so kindly send me the C source code to e-mail address.

    kamil -March 30, 2008

    sir, I am a B.tech final year E.E.E student. Now i am completing my project documentation on microcontroller based speed control of D.C motor.so i want the applictaions of this project .so kindly send me the applications to e-mail address.

    kiran nls -March 27, 2008

    I am urgently in need of code to control DC motor speed (9V) and also display the same using 8051 and PWM.. Please let me know

    Anonymous -March 22, 2008

    hi sir i want assembly language code for driving dc motor ckt using ic 89C51 microcontroller urgently... wating for ur mail

    Anonymous -March 21, 2008

    i want the information regarding pwm based control of dc motor

    venkat -March 20, 2008

    i want the information regarding pwm based control of dc motor

    venkat -March 20, 2008

    Hello, I am in urgent need of a schematic & detailed circuit diagram for controlling the speed of 24volts dc motor using pic16f84,n i want control de seed by using 2 push button

    elan -March 19, 2008

    hi i am doing a prj on dc drives. want some information of 89c51 , and its basic circuit diagram for interfacing with drives relay. and how to initialize 89c51....in c prog??? plz help..

    neelesh -March 15, 2008

    Morning sir,i want complete circuit operation and related theory about bidirectional speed control of a dc motor using PWM technique..

    pratap -March 13, 2008

    Can you please explain to me how do i run a 5V DC motor in two directions while also varying the speed using a PIC 16F877 Microcontroller.

    Anonymous -March 12, 2008

    Can you please explain to me how do i run a 5V DC motor in two directions while also varying the speed using a PIC 16F877 Microcontroller.

    Anonymous -March 12, 2008

    Sir, i am doing project for controlling the speed of BLDC(using hall sensors) motor using ADuC812 micro-controller and PWM technique. I found some difficulty to do the C-program for micro-controller. So i request you to help me for programming part alone. moreover i am going to measure the speed of motor using rotary encoder.

    vinoth kumar-coimbatore -March 10, 2008

    hello! i want complete information about pc based speed control of dc motor using pwm technique.plz send me. thanks!!!

    swathi -March 09, 2008

    pid control learning

    saeid pardis -March 09, 2008

    if please send information regardingDC Motor control with PWM using 8051 microcontroller(for variable speed)

    Anonymous -March 06, 2008

    hi i want the informationn regarding PID CONTROLLER DESIGN USING 8051 MICROCONTROLLER WITH PROGRAM CODING THANKS, SANDEEP

    sandeep v -March 04, 2008

    Hi, I want the information regearding stepper motor drive with PWM . And also need the corresponding CKT Diagram.

    Thanks, John Kennedy

    John kennedy -March 04, 2008

    can u send me the ckt dig of dc motor control using 89c51 plz its urgent. thanking u , plz reply

    sagar s. surve -March 03, 2008

    i want any ckt which control stepper motor by using 89c51rd2 microcontroller.please help me.Thanks lot.

    sagar -February 26, 2008

    Yes of course you stupid idiot. Everyone wants to send your lazy butt all the information you desire at no charge. Get a life.

    Lazy! -February 26, 2008

    please send the ckt model and description of speed control of dc motor using micro controllrer thanking you sir

    Anonymous -February 23, 2008

    please send the ckt model and description of speed control of dc motor using micro controllrer thanking you sir

    Anonymous -February 23, 2008

    Hi,please send me the document of circuit or Ic to controller DC motor speed and step motor using 89c51 microcontroller.Thanks.

    Anonymous -February 22, 2008

    Hi,please send me the document of circuit or Ic to controller DC motor speedusing 89c51 microcontroller.Thanks.

    anonymous -February 22, 2008

    Hello !!!!! i am a final year student in engineering. i am going to make a project on the speed control of dc motor using micro controller.

    and the motor should be stopped in given time period so please help me please send me technique & circuit diagram

    jignesh patel -February 21, 2008

    Sir , i am in need of a circuit diagram for stepper motor control (Bipolar,2 Phase, 6 pin input) using AT89C51 would u help in this PLs,,,

    Anonymous -February 20, 2008

    I AM IN A GREAT NEED OF A CIRCUIT AND ASM (OR) C PROGRAM CODING WHICH CAN CONTROL SPEED AND DIRECTION OF A DC MOTOR USING AT89C52. ANY HELP IN THIS MATTER WOULD HELP ME A LOT. WAITING FOR UR REPLY

    Anonymous -February 19, 2008

    Can anyone one help me out to design the speed controller using 16f84?

    recca84 -February 09, 2008

    i want to view the circ iut diagram of a dc controller using 74ls244 or l293b

    Anonymous -February 08, 2008

    I AM IN A GREAT NEED OF A CIRCUIT WHICH CAN CONTROL SPEED AND DIRECTION OF A DC MOTOR USING AT89C51. ANY HELP IN THIS MATTER WOULD HELP ME A LOT. WAITING FOR UR REPLY

    Nadia Salim -February 07, 2008

    Hi everyone, I really need to know how to reverse a DC motor using 8051 microcontroller, thank you!!!

    dani -February 06, 2008

    i m in final year student i want to project on speed control of d.c. motor by DSP plz give suggetion

    pranav -February 06, 2008

    hi i would be grateful if you could send me a circuit diagram for a motor speed controller with PWM for PIC 16f87 series. Thanks.

    zak -February 05, 2008

    sir,can you give the circuit in controlling a dc motor that can perform both forward and reverse using pic microcontroller. thank you! god bless.

    jboy -February 04, 2008

    hi all i want the full version and schmatics for controlling of DC motor speed control with PWM using microcontroller 89c51 and using proper H-bridge driver. kindly help me

    SHAIK ABDUL wadood -February 04, 2008

    hi all i want the full version and schmatics for controlling of DC motor speed control with PWM using microcontroller 89c51 and using proper H-bridge driver. kindly help me plzzzzzzzzzzzzzzzzzzzzzzzzzzz......................................!

    farrukh ijaz -February 03, 2008

    can i get schematic diagram of simple dc motor speed controller? tnx

    Anonymous -February 01, 2008

    sir iwant circuit diagram of speed control of dc motor using IR TECHNOLOGY

    Anonymous -January 28, 2008

    sir iwant circuit diagram of speed control of dc motor using IR TECHNOLOGY

    Anonymous -January 28, 2008

    sir ,i want the circuit of speed control of dc motor using IR technology

    Anonymous -January 28, 2008

    sir ,i want the circuit of speed control of dc motor using IR technology

    Anonymous -January 28, 2008

    sir ,i want the circuit of speed control of dc motor using IR technology

    Anonymous -January 28, 2008

    sir ,i want the circuit of speed control of dc motor using IR technology

    Anonymous -January 28, 2008

    sir ,i want the circuit of speed control of dc motor using IR technology

    Anonymous -January 28, 2008

    Hello sir, i want a wireless stepper motor controller simple ckt using microcontroller

    IT IS TOO URGENT

    Anonymous -January 28, 2008

    Hello, I need to do the following design. Could you please help me on this matter.

    Designing the circuit for a DC motor position and speed control.

    For position control, Use TL494 to generate PWM signal and LMD18200 H-Bridge circuit. Use potentiometer to measure the position and using P controller.

    For speed control, Use TL494 to generate PWM signal and LMD18200 H-Bridge circuit. Use Tacho meter to measure the speed and using P controller

    In both cases, a PC connected through a DSP board drive the circuit.

    Thanks. Sutha.

    Anonymous -January 22, 2008

    Hello, I need to do the following design. Could you please help me on this matter.

    Designing the circuit for a DC motor position and speed control.

    For position control, Use TL494 to generate PWM signal and LMD18200 H-Bridge circuit. Use potentiometer to measure the position and using P controller.

    For speed control, Use TL494 to generate PWM signal and LMD18200 H-Bridge circuit. Use Tacho meter to measure the speed and using P controller

    In both cases, a PC connected through a DSP board drive the circuit.

    Thanks. Sutha.

    Anonymous -January 22, 2008

    I agree with lazy bugger

    Anonymous -January 18, 2008

    Hello, I need to do the following design. Could you please help me on this matter.

    Designing the circuit for a DC motor position and speed control.

    For position control, Use TL494 to generate PWM signal and LMD18200 H-Bridge circuit. Use potentiometer to measure the position and using P controller.

    For speed control, Use TL494 to generate PWM signal and LMD18200 H-Bridge circuit. Use Tacho meter to measure the speed and using P controller

    In both cases, a PC connected through a DSP board drive the circuit.

    Thanks. Sutha.

    Sutha -January 13, 2008

    hi need to get details of boschs motor speed controller ( B4732.1)using in suv

    smiju -January 13, 2008

    i AM IN A GREAT NEED OF A CKT WHICH CAN CONTROL SPEED AND DIRECTION OF A DC MOTOR USING AT89C51. ANY HELP IN THIS MATTER WOULD HELP ME A LOT. WAITING FOR UR REPLY.

    robo vision -January 11, 2008

    hi, i need full details about the dc motor using c coding based on atmel. pls help me...

    sankar narayanan -January 11, 2008

    Hi. Need help in designing a dc speed controller using 16F84.

    dias -January 08, 2008

    i I want to get information to SPEED CONTROLE OF D.C MOTOR WITH THE HELP OF PWM. And also I want to get the corresponding CKT Diagram as necessary. pls provide the program in c laguage

    Vinoth -January 05, 2008

    i want full details about dc motor control using pic microcontroller with circuit diagram

    balu -January 01, 2008

    You're all a bunch of lazy buggers. Why don't you try reading a book or two on the subject instead of posting incoherent requests for someone else to do you work for you?

    LazyBugger -December 17, 2007

    It would have been beeter if the author had presented the idea in a little bit more detail.

    Anonymous -December 16, 2007

    i want report about speed control of d.c motor by using computer

    zmh85 -December 05, 2007

    hello sir, is there any information about control speed of dc motor interfaced with pic18f242(actual schematic).hopefully u can do email me

    spudin -December 02, 2007

    please send me a simple circuit diagram for 12V DC motor controller

    prasad senaratne -November 19, 2007

    sir, i want the exact circuit diagram for the dc speed control of a motor using microcontroller AT89c51 or can i go for any other controller rather than this

    vinoth kumar -November 16, 2007

    sir i want to control the speed of DC motor using 8051 microcontroller, cld u pls help me in the ckt

    rakshit -November 16, 2007

    hello, I am interfacing 8051 Microcontroller using keil compiler using assembly language .I have sample code with me but i need its basic interfacing circuit to understand the code.so plz send me...

    sumalatha -November 15, 2007

    microcontroller pic based speedcontrol of dc motor thyristor control technique

    murali -November 07, 2007

    sir, i want to make a design a speed control of dc motor using adc ,fvc,analog switch.please suggest me.

    jaydeep deb -October 30, 2007

    i urgently need circuite and other detail about microcontroller 89c52 based tachometer with seven segment LED display.

    Mohsin sidi -October 27, 2007

    i need to change the dc supply voltage(0-30V)using my pc( visual basic 6) through serial port communication with AT89C51. plz help me with this task.

    lesin -September 20, 2007

    I need the analog moor control concept used in electrical power steering with respect to PWM control and PI control with analog circuits (without microcontroller)

    RAFS -September 17, 2007

    i want a circuit to interface a dc motor with 89c51

    abhishek gupta -September 11, 2007

    please give me the circuit and assembly language for 89c51 using which i can control the motor when i get signel from externel source

    shamal -August 31, 2007

    sir i want a complete ckt and software to control a 6v dc motor from microcontroller.....pls help me....

    ramesh -August 30, 2007

    sir... do u have any info how to control motor speed digitally... hopefully u can send to me the detail info include the circuit & name of component that being used...

    Anonymous -August 27, 2007

    I want to get information to SPEED CONTROLE OF D.C MOTOR WITH THE HELP OF 8051 microcontroller.

    ajith -August 21, 2007

    SIR I am facing problem in interfacing IC 89C51 with 12 V DC Motor and its driver circuit, as for DC Motor an option for direction has to be given and no speed contro is required. Plz guide me as am stucked in last stages if i can sent u the ckt diagram which I ve designed.

    Saurabh Malhotra -August 17, 2007

    i need the circuit diagram of "wireless speed control of DC motor using zigbee"...can anybody help me out in this matter.if so pl send it 2 my mail...

    varsha -August 08, 2007

    It's difficult to understand without a schematic diagram.I looking to control the DC motor speed independent with load,can you assist me by the way of measuring the load and convert it to a voltage that needed to supply the motor so that it can be able to deal with the load applied?

    Akona -August 05, 2007

    Please,if somebody have circut and program for 8086 and microcontroler 8051 for step motor, can you send me to mail.Thanks lot

    Vuk -August 02, 2007

    ojoxhn

    Anonymous -July 23, 2007

    ojoxhn

    Anonymous -July 23, 2007

    AC DRIVE

    mortaza -July 20, 2007

    I need DC MOTOR + MICROCONTROLLER

    ele.king -July 15, 2007

    i need circuit for microcontroller based stepper motor controller using ic89c51 and a programm for it to.

    prashant -July 10, 2007

    very good

    anhphuoc -July 07, 2007

    ello...i need the circuit diagram of dc motor speed controller using 80C51 microcontroller...plzzzzzzzzzz send me itss very very urgent.....

    zain -July 04, 2007

    Sir, I am interfacing 8051 Microcontroller using keil compilerwith 'C' language.I want sample code for basic interfacing module like lcd,led,steppermotor,keypad.

    Mageshwary.R -June 29, 2007

    Sir, I am interfacing 8051 Microcontroller i want sample code for basic interfacing module like lcd,led,steppermotor,keypad.

    Mageshwary.R -June 29, 2007

    Hi,please send me the document of circuit or Ic to controller DC motor speed and step motor using 89c51 microcontroller.Thanks.

    Anonymous -June 27, 2007

    As a part of project work, we are doing the speed control for DC Motor using microcontroller, we need the entire set of project and reports etc. Those having this with them, please mail to me

    Varghese, GEC Thrissur -June 27, 2007

    i want dc motor speed control circut and coding using microcontrpller 89c2051 . thanks

    dinesh singh -June 22, 2007

    r

    assassin -June 13, 2007

    r

    assassin -June 13, 2007

    Hi,please send me the document of circuit or Ic to controller DC motor speed and step motor using 89c51 microcontroller.Thanks.

    Nagarajan -May 25, 2007

    I need circuit in which dc motor is use. Pleas reply

    Shoaib -May 20, 2007

    anyone who have the full report project for controlling stepper motor using 8086 microprocessor, please e-mail me at najib_cromok86@yahoo.com, i need it urgently, thanks..

    najib -May 18, 2007   (Article Rating: )

    sir, i am very urgent needed 8086 program for controlling a stepper motor

    najib -May 18, 2007

    i need a circuit diagram of a electrical project which control by a dc motor

    m wasim anjum -May 15, 2007

    sir, can u give to me any projects using microcontroller 8051

    mohd emran -May 15, 2007

    sir, can you please send me the design circuit for stepper motor control using microcontroller 8051

    mohd emran -May 15, 2007

    hello sir, I need the sample code for converting hex to ascii value, b'cause i want to write some data on lcd .Thankyou....

    Achuthan -May 10, 2007

    urgent need of project ckt with using 89c52 of time vs speed output 0-10 v

    vardhman jain -May 06, 2007

    Hello Sir, I am in urgent need for a Complete project that involves 89C51 IC which controls a DC motor,plz suggust any application along with it. Thanks

    Azher -May 05, 2007

    hi can u pls send a microcontroller program for rf based wireless speed control of dc motor

    KRISHNA CHAITANYA -April 03, 2007

    J'AI BESOIN DE LA SIMULATION DE LA MACHINE ASYNCHRONE ASSOCIE 0A L'ONDULEUR AVEC SIMPLORER

    hidouche mohamed -April 02, 2007   (Article Rating: )

    how to build a dc motor circuit using 8051???

    po'e -April 01, 2007

    i'm in need of a ckt to controll the speed forword and reverse using 16f84a microcontroller.

    Anonymous -April 01, 2007

    Hello Sir, I am in urgent need for a mini project that involves 89C51 Ic which controls a DC motor,plz suggust any application along with it.

    Anonymous -March 31, 2007

    Hello Sir, I am in urgent need for a mini project that involves 89C51 Ic which controls a DC motor,plz suggust any application along with it.

    Anonymous -March 31, 2007   (Article Rating: )

    HI THERE I WOULD LIKE TO BUILD A CONTROLER FOR A 24 VOLT DC MOTOR ABOUT 60 AMP ANY CHANCE SOME HELP ON THE CKT..BYE THANKS

    CHAS -March 30, 2007

    sir,send me dc speed cotroller ckt using michroprocesser

    sharad -March 28, 2007   (Article Rating: )

    .............................................

    Anonymous -March 25, 2007

    .......................................................................

    Anonymous -March 25, 2007   (Article Rating: )

    I whnt electronics circuits for dc motor speed controle the motor 750 W 4.2 A 3000 N/min 180 vdc

    SA BAQUI -March 19, 2007

    controle speed motor DC

    ayoub -March 18, 2007

    hello sir,i need a circuit diagram of bipolar stepper motor controller using AT89c51.

    d. suresh kumar -March 07, 2007   (Article Rating: )

    good to get requier information, I want to get information to SPEED CONTROLE OF D.C MOTOR WITH THE HELP OF PWM. And also I want to get the corresponding CKT Diagram as necessary.

    kalathiya suresh h. -March 07, 2007

    sir, can you please send me the design circuit for dc motor control using microprocessor 8086

    ali -February 20, 2007

    sir, can you please send me the design circuit for dc motor control using microprocessor 8086

    rohit aggarwal -January 22, 2007

    Hello sir, I have a project about controlling an stepper motor using 8086 microprocessor. This stepper motor should rotate in 2 direction and and it will be done by reverse and forward buttons on keyboard. There should be 2 more keys to change the speed of rotation , UP and DOWN. and also the speed should be displayed on a seven segment unit. Its very kind of u if u can help me.

    FOAD -January 03, 2007   (Article Rating: )

    Hello sir, I have a project about controlling an stepper motor using 8086 microprocessor. This stepper motor should rotate in 2 direction and and it will be done by reverse and forward buttons on keyboard. There should be 2 more keys to change the speed of rotation , UP and DOWN. and also the speed should be displayed on a seven segment unit. Its very kind of u if u can help me.

    FOAD -January 03, 2007   (Article Rating: )

    hello sir, i am searching for the circuit diagram for a computer controlled 89c52 stepper motor controller and interface. plz reply.

    Anonymous -January 02, 2007

    I AM IN A GREAT NEED OF A CKT WHICH CAN CONTROL SPEED OF A DC MOTOR USING 89C51RD2. ANY HELP IN THIS MATTER WOULD HELP ME A LOT. WAITING FOR UR REPLY

    BHUVAN -December 13, 2006   (Article Rating: )

    hello sir,I want a cirvcuit used to control speed and convert to voltage

    TEFERA -December 13, 2006

    hellosir,I want a circuit which is used to control seed of motor and convert to voltage

    TEFERA -December 13, 2006

    can you send me the lowest ratings of d.c.series motor

    elisha -December 12, 2006

    Hello sir, these released articles are very useful by all means. thanks for this.

    Sandeep Anpat -November 22, 2006   (Article Rating: )

    can you send me a schematic for H bridge 24v 45w motor drive with 89c51?

    kenza100 -November 16, 2006

    pls send me the circuit diagram and functioning of dc motor controled by computer.

    avik -November 16, 2006   (Article Rating: )

    I want to get information to SPEED CONTROLE OF D.C MOTOR WITH THE HELP OF PWM. And also I want to get the corresponding CKT Diagram as necessary.

    srinivasan -November 09, 2006   (Article Rating: )

    I want to get information to SPEED CONTROLE OF D.C MOTOR WITH THE HELP OF PWM. And also I want to get the corresponding CKT Diagram as necessary.

    KUNAL PACHAL -October 22, 2006   (Article Rating: )

    hello, i want ckt.dia. of dc motor control by 8051 microcontroller & also some need program of the drive dc motor

    KARAN -October 16, 2006

    great!! but i want to get the simple speed controller circuit for the DC motor...... OR i want to get the variable speed controller Circuits for the DC motor......

    awan -October 15, 2006   (Article Rating: )

    control of DC motor with PIC16F84

    zozo -September 15, 2006   (Article Rating: )

    I TO CONTROL THIS CKT BY A PC.PLEASE GIVE ME INSTRUCTIONS & CKT DIAGRAM.

    ASHIK -September 12, 2006

    I WANT TO CONTROL THIS CKT BY A PC.PLEASE GIVE ME INSTRUCTIONS & CKT DIAGRAM.

    ASHIK -September 12, 2006

    i AM IN A GREAT NEED OF A CKT WHICH CAN CONTROL SPEED AND DIRECTION OF A DC MOTOR USING 89C51RD2. ANY HELP IN THIS MATTER WOULD HELP ME A LOT. WAITING FOR UR REPLY.

    SALMAN -September 04, 2006

    i AM IN A GREAT NEED OF A CKT WHICH CAN CONTROL SPEED AND DIRECTION OF A DC MOTOR USING 89C51RD2. ANY HELP IN THIS MATTER WOULD HELP ME A LOT. WAITING FOR UR REPLY.

    SALMAN -September 04, 2006   (Article Rating: )

    kindly send me schematic & detailed circuit diagram for microcontroller based closed loop speed control of separately exited dc motor using convertor. thanks

    S. Bharti -September 01, 2006   (Article Rating: )

    hello sir, i want to control an dc motor speed. for i require an ckt or any related information about the F to V converter.

    santosh kulkarni -August 27, 2006

    Hello I need to know how to control a DC motor (5 to 24 v)with PWM technic via 89c51 Micro Controler.Is that possible to send me the documents which are needed to do so?

    Mohammad Goli -August 27, 2006   (Article Rating: )

    I am looking at controlling my 12V brushed dc motor with an electronic speed controller, however my input voltage will be analog and the speed controller input from the reciever is a form of PWM... can you use an analog voltage? If not is there a way of converting an analog signal into a form that the speed controller can use?

    alex -August 23, 2006

    I need a circuit to ctrl a speed of dc series motor and a microcontroller program.

    anaz -August 11, 2006

    please send me the design circuit for dc motor control using microprocessor 8086

    punam -July 25, 2006

    embedded c code to measure speed of a dc motor and to display corresponding voltage on LCD

    krishna -July 21, 2006

    please send me the circuit diagram for DC motor control using LMD18245 ic driver and microcontroller 8051

    shreeya -June 20, 2006

    dc motor speed control and temperature control using embedded system technology

    pavan kumar -May 25, 2006

    Hello sir, i want a stepper motor controller simple ckt

    abhilash -May 16, 2006

    Hello, I am in urgent need of a circuit for controlling the speed of 12volts dc motor using MOSFETs or also suggest if there is any other method to control the speed of dc motor ..reply as early as possible

    P.Sandeep Kumar -April 15, 2006   (Article Rating: )

    Hello sir, i want a wireless stepper motor controller simple ckt

    Manoj Pandey -April 10, 2006

    I can give you circuit and software for 89c51rd2 for DC MOTOR CONTROL. SO YOU CAN CONTACT ME ON my email id.

    Anonymous -March 26, 2006

    i need dc motor speed control and interfacin with PC using 89C51- the circuit or block diagram. thanks.

    nirju -March 20, 2006   (Article Rating: )

    I AM IN A GREAT NEED OF A CKT WHICH CAN CONTROL SPEED OF A DC MOTOR USING 89C51RD2. ANY HELP IN THIS MATTER WOULD HELP ME A LOT. WAITING FOR UR REPLY

    rohit -March 17, 2006

    hi! i need dc motor (forward mode, reverse mode and braking) using 89C51- the circuit or block diagram. thanks.

    Haseeb -February 24, 2006

    I AM IN A GREAT NEED OF A CKT WHICH CAN CONTROL SPEED AND DIRECTION OF A DC MOTOR USING 89C51RD2. ANY HELP IN THIS MATTER WOULD HELP ME A LOT. WAITING FOR UR REPLY.

    NIRAV -January 26, 2006   (Article Rating: )

    I want the full version and schmatics for controlling of DC motor speed control with PWM using microcontroller 89c51 and using proper H-bridge driver.

    Mayur Patel -January 17, 2006

    can u send me the ckt dig of dc motor control using 89c51 plz its urgent. thanking u , plz reply

    Anonymousniraj -January 13, 2006

    i would like to get (1)pulse rate to analog converter circuit (2)speed regulation circuit and (3)acceleration regulation circuit using LM741. in our country, it is not easy to get these papers. please share to me if it is not too difficult to get for you. thanks.

    yarzar -November 14, 2005   (Article Rating: )

    I want a version of motor controller by 89c51 Please ,share it to me! Thank you !

    LE DUNG -October 30, 2005   (Article Rating: )

    it was easy to understand if there was a block diagram

    peter mathew -October 18, 2005   (Article Rating: )

    Hi,please send me the document of circuit or Ic to controller DC motor speed and step motor using 89c51 microcontroller.Thanks.

    Anonymous -October 02, 2005

    I whnt electronics circuits for dc motor speed controle the motor 750 W 4.2 A 3000 N/min 180 vdc

    ali hasson -May 16, 2005   (Article Rating: )

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