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Motor Control Circuits
Motor Controls:  #'s - D       E - M       N - S        T - Z

 

Last Updated: October 24, 2017 02:55 PM

Circuits Designed by Dave Johnson, P.E. :

PWM Circuit for Motor Speed Control - Sometimes you want to slow down a brush type DC motor.  The most efficient way to do this is with a pulse width modulation (PWM) technique.  The hobby circuit below can operate from about 3 volts to 15 volts.  The frequency is fixed at about 2KHz but the pulse . . . Hobby Circuit designed by David A. Johnson P.E.-December, 2007

PWM Motor Controller uses a 555 Timer - Using a CMOS version of the 555 timer, this circuit can be used to control the speed of a motor by adjusting the duty cycle of the pulses sent to the motor . . . Hobby Circuit designed by Dave Johnson P.E.-February, 2007


Links to electronic circuits, electronic schematics, designs for engineers, hobbyists, students & inventors:

PA fan temperature controlled speed Motor speed controller -  My Radio amateur callsign is OZ2CPU.  I like to use Atmel AVR Atmega PIC16 PIC16F876 PIC16F84.  Most electronics easy made for the novice and something is for the more experienced.   __ Designed by Thomas Scherrer OZ2CPU

PC-Based DC Motor Speed Controller -  This circuit allows you to control the speed of a DC motor  (in eight levels) from your PC’s parallel port.  The PC uses a software program to control the speed of...__ Electronics Projects for You

PC-Based Stepper Motor Controller -  This stepper motor controller is perhaps the cheapest, smallest and simplest.  A pair of H-bridges with a software program written in ‘C++’ is used to control the bipolar stepper motor with...__ Electronics Projects for You

 

Phorism with 12V -  Circuit Only + PCB __ Contact: IQ Technologies

PC-Based Stepper Motor Controller -  This stepper motor controller is perhaps the cheapest, smallest and simplest.  A pair of H-bridges with a software program written in ‘C++’ is used to control the bipolar stepper motor with...__ Electronics Projects for You

PIC Based Motor Controller -  On these pages, I will introduce a control circuit for stepper motor.  The software of this project is adapted to Embedded Systems  (Lab13) for 2002 of Cleveland State University.  PIC16F84A __ Designed by Seiichi Inoue

Plane Motor Controller with High-Rate ESC, BEC & Brake -  This electronic speed control  (ESC) for brushed motors combines the features of two of my earlier designs.  One was a high-rate 30A ESC with a brake, and the other a high-rate 12A ESC with a BEC  (receiver battery eliminator circuit) .   __ Designed by Stefan Vorketter

Porch Light Switch -  This circuit will activate a relay when light falls to a preset level.  Light level can be adjusted with VR1 and the relay contacts may be used to operate an external light or buzzer.   __ Designed by Andy Collison

Position Detectors provide Motor-control logic -  05/24/01 EDN-Design Ideas - In the circuit of Figure 1 , assume that a brush-type dc motor must drive a load back and forth between two endpoints on a lead screw.  Optical sensors determine end of travel, and an SPDT switch selects to which end to send the load.  The sensors themselves supply all the necessary directional logic, and a TRIAC powers the motor with the necessary polarity of half-wave pulses from the 13.   PDF have several circuits, scroll for this one __ Circuit Design by Steve Pomeroy and Russell Hedges, Elgar Corp, San Diego, CA

Power Load Sensing Automatic Switch -  WARNING:  This circuit requires experience with mains wiring.  Do not attempt construction unless experienced and capable.  Death or serious injury may result from incorrect wiring.   __ Designed by Rod Elliott  ESP

Practical H-Bridge Current Monitor Offers Fault Detection & Bidirectional Load Information -  This circuit shows a differential load measurement for an ADC using twin unidirectional sense measurements.  Each LTC6101 performs high side sensing that rapidly responds to fault conditions, including load shorts and MOSFET failures.  Hardware local to the switch module  (not shown in the diagram) can provide the protection logic and furnish a status flag to the control system.__ Linear Technology/Analog Devices App Note, Apr 5, 2010

Programmable source powers DC micromotors -  03/01/01 EDN-Design Ideas - A simple, economic, compact, and tricky way of using the LM723 as a programmable voltage source to drive dc micromotors which can set the output to a value of200 mV to 6V __ Circuit Design by V Dubey

Protect system from overheating -  11/08/01  EDN-Design Ideas - The two-chip circuit in Figure 1 provIdeas fan control and overtemperature warning and shutdown signals to protect systems from excessive heat.  The circuit monitors the temperature of the pc board and the die temperature of a CPU, an __ Circuit Design by Kerry Lacanette, Maxim Integrated Products, Sunnyvale, CA

Provide Bidirectional Variable Speed Motor-Control -  05/16/02 EDN-Design Ideas - During the development of systems that include small motors, a simple, bidirectional motor controller with speed adjustment may be heLPFul.  Figure 1 shows such a controller.  The circuit uses everyday components whose tolerances and ratings are unimportant as long as they sustain the required voltage, current, and power __ Circuit Design by Jean-Bernard Guiot, DCS AG, Allschwil, Switzerland

Provide Class D Motor Control -  05/01/03  EDN-Design Ideas - Class D audio amplifiers provide a dual benefit for battery-powered portable devices.  They enhance battery life, and they produce much less power dissipation than do their linear cousins.  Those features make Class D amplifiers ideal __ Circuit Design by John Guy, Maxim Integrated Products, Sunnyvale, CA

Provide efficient fan-speed control -  03/04/04  EDN-Design Ideas - As Moore's Law plunges us into the realm of multigigahertz processors and PCs with gigabytes of RAM, engineers face the task of removing the heat that these state-of-the-art components produce.  Cooling such systems poses a dilemma.   __ Circuit Design by John Guy, Maxim Integrated Products, Sunnyvale, CA

Provides Brownout Control of 80c31 -  08/19/99EDN-Design Ideas - In the reset and watchdog-timer circuit in Figure 1, IC1 is a 74HC14 Schmitt-trigger inverter that, with R1 and C1, acts as an astable oscillator.  The circuit provIdeas an active-high reset for an 80C31 µC.  The watchdog trigger  (W __ Circuit Design by N Kannan, Mediatronix, Pappanamcode, India

Provides Efficient Fan-Speed Control -  03/04/04  EDN-Design Ideas - As Moore's Law plunges us into the realm of multigigahertz processors and PCs with gigabytes of RAM, engineers face the task of removing the heat that these state-of-the-art components produce.  Cooling such systems poses a dilemma.   __ Circuit Design by John Guy, Maxim Integrated Products, Sunnyvale, CA

Pulse width Modudulator using 555 timer IC -  This circuit is capable of regulating 12V motors and DC light bulbs.  No coolrib required for Q1 or D3 if the current does not exceed 2A.  If it does, a sufficient coolrib for both the Schottky Diode  (D3) and MOSFET Q1 is required __ Designed by Tony van Roon  VA3AVR

Pulse Width Modulation DC Motor Control -  Often, people attempt to control DC motors with a variable resistor or variable resistor connected to a transistor.  While the latter approach works well, it generates heat and hence wastes power.  This simple pulse width modulation DC motor control eliminates these problems.  It controls the motor speed by driving the motor with short pulses.  These pulses vary in duration to change the speed of the motor.  The longer the pulses, the faster the motor turns, and vice versa. __ Designed by Aaron Cake

Push Button Motor Control -  This circuit uses solid state switching  (transistors) to control direction of a DC motor.  You have precise control of the movement of the motor, and an indication of direction provided by LED's.   __ Designed by Andy Collison

PWM Circuit for Motor Speed Control -  Sometimes you want to slow down a brush type DC motor.  The most efficient way to do this is with a pulse width modulation  (PWM) technique.  The hobby circuit below can operate from about 3 volts to 15 volts.  The frequency is fixed at about 2KHz but the pulse . . . Hobby Circuit designed by David A. Johnson P.E.-December, 2007

PWM Control forHydrogen Generators -  Unlike conventional PWM Circuits, This circuit also has a special "Current Limit Control".  "If your H-Cell gets hotter and tries to draw more current, This circuit won't let it".   __ Designed by G.L. Chemelec

PWM Controller -  This controller will deliver up to 30 amps and control the motor from 5% to 95%.  __ 555-Timer

PWM Controller -  This PWM controller is cheap and easy to build, but has no temperature control and with components shown runs at relatively low frequency. __ Designed by © Madis Kaal

PWM controller drives LEDs from high-voltage lines -  4-Mar-04 EDN-Design Ideas - Powering LEDs from a wide dc range—say, 30 to 380V—without wasting a lot of power in the regulating block, is a difficult task when the LED current needs to be constant.  Dedicated LED drivers are available, but they usually implement boost structures and are thus inadequate for high-voltage inputs __ Circuit Design by Christophe Basso, On Semiconductor, Toulouse, France

PWM DC Motor control with SG3525 -  This PWM DC Motor driver circuit is ideal for the accurate control of DC motors as well as other applications like lighting levels and small heaters etc.  The circuit converts a DC voltage into series of pulses, such that the pulse duration is directly proportion to the value of the DC voltage.  The great advantage of such a circuit is that almost no power is lost in the control circuit __ Contact: info @ wzmicro.com

Pwm Dc Motor Controller With Ne555 And Darlington Transistors -  This is circuit for dimmer a lamp or controll speed of a DC motor.  I used to suggests these circuit by use principle most PWM  (PWM Control Speed Motor 12V By TL494) form.  But TL494 is not cheap and hard to buy we use NE555 beter very cheap and popular.  This circuit have a lot

PWM DC Motor driver & control with SG3525 -  This PWM DC Motor driver circuit is ideal for the accurate control of DC motors as well as other applications like lighting levels and small heaters etc.  The circuit converts a DC voltage into series of pulses, such that the pulse duration is directly proportion to the value of the DC voltage.  The great advantage of such a circuit is that almost no power is lost in the control circuit __ Contact: info @ wzmicro.com

PWM DC Motor Speed Control -  This is a circuit for controlling the speed of small DC motors, it works nicely as a speed controller for an HO or N gauge model railroad __ Designed by G. Forrest Cook

Pwm Dimmer/Motor Speed Controller -  This is yet another project born of necessity.  It’s a simple circuit, but does exactly what it’s designed to do – dim LED lights or control the speed of 12V DC motors.  The circuit uses PWM to regulate the effective or average current through the LED array, 12V incandescent lamp  (such as a car headlight

PWM fan controller in an EMI-susceptible -  02/16/06  EDN-Design Ideas - Control it with either an external negative-temperature-coefficient thermistor or a PIC microcontroller and its SMBus serial-data bus __ Circuit Design by Dimitri Danyuk, Niles Audio Corp

PWM Motor Control -  PIC Project  This device acts as a variable speed control for the heater blower in a car.  It takes its power directly from the existing wiring and connects with just 2 wires.  It will also work for any 12 volt device up to 10 amps.   __ Designed by Luhan Monat-Mesa Arizona

PWM Motor Controller -  Schematic only, no circuit description__ drawn Rich Rudman

PWM Motor Controller uses a 555 Timer -  Using a CMOS version of the 555 timer, this circuit can be used to control the speed of a motor by adjusting the duty cycle of the pulses sent to the motor . . . Hobby Circuit designed by Dave Johnson P.E.-February, 2007

PWM Motor Speed Controller / DC Light Dimmer -  A pulse width modulator  (PWM) is a device that may be used as an efficient light dimmer or DC motor speed controller.  The circuit described here is for a general purpose device that can control DC devices which draw up to a few amps of __ Designed by G. Forrest Cook

PWM Motor Speed Controller / DC Light Dimmer -  A pulse width modulator  (PWM) is a device that may be used as an efficient light dimmer or DC motor speed controller.  The circuit described here is for a general purpose device that can control DC devices which draw up to a few amps of current.  The circuit may be used in either 12 or 24 Volt systems with only a few minor wiring changes.  This device has been used to control the brightness of an automotive tail lamp and as a motor speed control for small DC fans of the type used in computer power supplies. __ Designed by G. Forrest Cook

PWM Motor Speed Controller/DC Light Dimmer -  This circuit will work as a DC lamp dimmer, small motor controller, and even as a small heater controller.  It would make a great speed control for a solar powered electric train.  The circuit has been tried with a 5 Amp electric motor using and IRFZ34N FET and worked ok, D1 may need to be replaced with a faster and higher current diode with some motors.  The circuit should work in applications such as a bicycle motor drive system, if you experiment with this, be sure to include an easily accessible emergency power disconnect switch in case the FET shorts out and leaves the circuit full-on. __ Designed by G. Forrest Cook

PWM Motor/Light Controller -  The diagrams are for 12V operation only and there are high side    (common ground) and low side    (common +12V) versions.  The low side version of the circuit uses an N Channel FET, the high side version of the circuit uses a P Channel FET.  N Channel devices tend to handle more current than P Channel devices, they are also less expensive.  The high side version of the circuit is useful when one side of the load has to be grounded __ Designed by G. Forrest Cook

PWM Motor/Light Controller-12V Low & High Side -  These two schematics are variations on another PWM circuit that I designed.  The diagrams are for 12V operation only and there are high side  (common ground) and low side  (common +12V) versions.  The low side version of the circuit uses an N Channel FET, the high side version of the circuit uses a P Channel FET.  N Channel devices handle more current and cost less than P Channel devices.  The high side version of the circuit is useful when one side of the load has to be grounded. __ Designed by G. Forrest Cook

PWM Speed Control -  includes theory and some example circuits __ Designed by Richard Torrens

PWM-Based Motor Speed Control Simulation using Ltspice -  Pulse-width modulation  (PWM) is one of the oldest and widely used techniques of controlling electrical motors.  To control the speed of the motor, the average value of the PWM pulse...__ Electronics Projects for You

PWM-Based Speed Control for DC Motors -  There are several methods for controlling the speed of DC motors.  One simple method is to add series resistance using a rheostat.  As considerable power is consumed in the rheostat, this...__ Electronics Projects for You

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Motor Controls:  #'s - D       E - M       N - S        T - Z

 


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