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H-Bridge Circuits
 

Last Updated: October 09, 2017 03:39 PM


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

Circuits Designed by Dave Johnson, P.E. :

Alternating CW & CCW Motor DriverA while back a company needed a motor controller for a custom door latching system.    The system used a small brush motor with a speed reduction gear to both latch and unlatch the door.    When pulsed for about 250ms in the clockwise direction, the motor would unlatch the door. . . Circuit by David Johnson P.E.-September, 2010

Control both Power & Direction of a DC MotorTTL type Q and inverted Q inputs control a classic H-bridge circuit, rated at 50 volts and about 10 amps.  The circuit can control power and direction of a DC motor . . . Hobby Circuit designed by David Johnson P.E.-February, 2007

CW & CCW Alternating Motor DriverA while back a company needed a motor controller for a custom door latching system.    The system used a small brush motor with a speed reduction gear to both latch and unlatch the door.    When pulsed for about 250ms in the clockwise direction, the motor would unlatch the door . . . Hobby Circuit designed by Dave Johnson P.E.-September, 2010

H Bridge Motor Controller uses Low PowerThis circuit uses a few logic gates & a 74AC240 to control power to a small gear motor . . . Hobby Circuit designed by Dave Johnson P.E.-July, 2005

Low Power H Bridge Motor ControllerThis circuit uses a few logic gates & a 74AC240 to control power to a small gear motor. . . Circuit by David A. Johnson P.E.-July, 2005

Low Voltage H-BridgeTTL type Q and inverted Q inputs control a classic H-bridge circuit, rated at 50 volts and about 10 amps.  The circuit can control power and direction of a DC motor. . . Circuit by David A. Johnson P.E.-February, 2007

4-transistor H-bridge -  An interesting 4-transistor H-bridge variant; this is cheap and easy to build, and best of all is "smokeless"   (i.  e.  , no combination of inputs can cause the bridge to self-destruct).   __ Designed by Steve Bolt

6-transistor H-bridge -  This issix transistor "Tilden style" H-bridge; while not as old asoriginal "basic H-bridge, " this goes "way back, " and is basis for many BEAM driver circuits __ Contact: Bruce Robinson

A better MOSFET H Bridge Schematic -  Schematic onlyno circuit desciption included __ Designed by Eugene Blanchard

A H-Bridge Design -  With a Protection against Having Two Positive Input Pulses.   __ Designed by G.L. Chemelec

Alternating CW & CCW Motor Driver -  A while back a company needed a motor controller for a custom door latching system.    The system used a small brush motor with a speed reduction gear to both latch and unlatch the door.    When pulsed for about 250ms in the clockwise direction, the motor would unlatch the door. . . Circuit by David Johnson P.E.-September, 2010

Better MOSFET H Bridge -  Schematic onlyno circuit desciption included __ Designed by Eugene Blanchard

Control both Power & Direction of a DC Motor -  TTL type Q and inverted Q inputs control a classic H-bridge circuit, rated at 50 volts and about 10 amps.  The circuit can control power and direction of a DC motor . . . Hobby Circuit designed by David Johnson P.E.-February, 2007

CW & CCW Alternating Motor Driver -  A while back a company needed a motor controller for a custom door latching system.    The system used a small brush motor with a speed reduction gear to both latch and unlatch the door.    When pulsed for about 250ms in the clockwise direction, the motor would unlatch the door . . . Hobby Circuit designed by Dave Johnson P.E.-September, 2010

DC Motor-Driver H-Bridge -  Physical motion of some form helps differentiate a robot from a computer.  It would be nice if a motor could be attached directly to a chip that controlled the movement.  But, most chips can't pass enough current or voltage to spin a motor.  Also, motors tend to be electrically noisy (spikes) and can slam power back __ Contact: David Cook

Four-transistor H-bridge -  an interesting 4-transistor H-bridge variant; this is cheap and easy to build, and best of all is "smokeless" (i.  e.  , no combination of inputs can cause the bridge to self-destruct).   __ Designed by Wilf Rigter

Full-featured Dual H-bridge -  I had always assumed that dynamic braking would be most effective at higher speeds.  However, actual tests using a Faulhaber (micro mo) gearmotor showed that the brake would hold a motor almost stationary.  These gearmotors are so well made that I can turn the 4 mm diameter shaft with light finger pressure.  For the tests I had mounted a 90 mm diameter wheel, which gave me tremendous mechanical advantage.  I found with the wheel mounted that I could barely turn the motor against the brake.   __ Designed by Bruce Robinson

Full-featured H-bridge -  This is a slightly revised version of the 6-transistor H-bridge designed by Mark Tilden and found on the BEAM Tek website (now only available via archive).  I encourage anyone interested in H-bridges to read Mark's article, as it gives an excellent step-by-step explanation of how the bridge works.  In particular, it discusses variations on the bridge, such as the positive-input and negative-input versions.  The basic circuit is as Mark describes it.  The changes are as follows.   __ Designed by Bruce Robinson

H Bridge Motor control -  Before trying to understand a full bridge circuit, you may care to read up on PWM controllers, which page also describes how a half-bridge circuit works.  Most full bridge motor controllers also use pwm! Designing a full-bridge PWM circuit that is reliable and 'user-proof' is actually quite difficult! 4QD released our first such controller in 1992: it was probably not the first but was certainly early in the race. __ Designed by Richard Torrens

H Bridge Motor Controller uses Low Power -  This circuit uses a few logic gates & a 74AC240 to control power to a small gear motor . . . Hobby Circuit designed by Dave Johnson P.E.-July, 2005

H-Bridge -  This circuit drives a motor clockwise / anticlockwise via a 10k to 100k pot.  __ 555-Timer

H-Bridge This circuit drives small DC motors up to about 100 watts or 5 amps or 40 volts, whichever comes first.  Using bigger parts could make it more powerful.  Using a real H-bridge IC makes sense for this size of motor, but hobbyists love to do it themselves, and I thought it was about time to show a tested H-bridge motor driver that didn't use exotic parts __ Designed by Bob Blick

H-Bridge Design -  With a Protection against Having Two Positive Input Pulses.   __ Designed by G.L. Chemelec

H-Bridge Driver using Isolated Half-Bridge Drivers -  The circuit can also be used in applications requiring higher supply voltages, but care must be taken to ensure the ratings of the MOSFETS and filter capacitors are not exceeded.  , Equipment Needed , Bullet text, Getting Started Load the evaluation software by placing the CN0196 evaluation software disc in the CD drive of the PC.  Locate the drive that contains the evaluation software disc and ope Using an inductor as the load, run the software and use a current probe to measure the current of the inductor.  Information and details regarding to how to use the evaluation software for proper PWM signals can be found in the CN0196 Evaluation Software Readme file.  __ Analog Devices from the Lab

H-Bridge drives DC Motors -  This circuit drives small DC motors up to about 100 watts or 5 amps or 40 volts, whichever comes first.  Using bigger parts could make it more powerful.  Using a real H-bridge IC makes sense for this size of motor, but hobbyists love to do it themselves, and I thought it was about time to show a tested H-bridge motor driver that didn't use exotic parts __ Designed by Bob Blick

H-Bridge Motor Control 4qdtec -  general introduction to H-Bridges __

H-Bridge Motor Controller 5 Amps 100 Watts -  This circuit drives small DC motors up to about 100 watts or 5 amps or 40 volts, whichever comes first.  Using bigger parts could make it more powerful.  Using a real H-bridge IC makes sense for this size of motor, but hobbyists love to do it themselves, and I thought it was about time to show a tested H-bridge motor driver that didn't use exotic parts __ Designed by Bob Blick

H-Bridge Motor Driver -  Physical motion of some form helps differentiate a robot from a computer.  It would be nice if a motor could be attached directly to a chip that controlled the movement.  But, most chips can't pass enough current or voltage to spin a motor.  Also, motors tend to be electrically noisy (spikes) and can slam power back __ Contact: David Cook

H-bridge paves New ways for LED lighting -  07/11/13  EDN-Design Ideas Drive a LED array directly from the AC mains in full-wave current-limited mode to realize a flicker-free, energy-efficient solid-state lamp.  The H-bridge is a classic circuit used for driving DC motors in a user-defined manner, such as in forward/reverse direction or PWM-assisted controlled RPM with the help of four discrete/integrated switches or electromechanical relays.  It is widely employed in robotics and power electronics.  This Design Idea is a novel implementation of this technique for driving white-LED arrays directly from the AC mains in full-wave current-limited mode to realize an excellent flicker-free, energy-efficient solid-state lamp.  __ Circuit Design by Subodh Johri

H-Bridge Power Amp -  (spice design)  __ Designed by Rick  last name not given

H-Bridge Schematic -  (spice design)  __

H-Bridge Switch for Small Motors -  Here's a simple switch circuit for reversing and stopping a motor without any control of speed. __ Designed by Richard Torrens

H-BRIDGE Theory & Practice -  A number of web sites talk about H-bridges, they are a topic of great discussion in robotics clubs and they are the bane of many robotics hobbyists.  I periodically chime in on discussions about them, and while not an expert by a long shot I've built a few over the years.  Further, they were one of my personal stumbling blocks when I was first getting into robotics[Chuck McManis] __ Designed by Chuck McManis

H-Bridge with PWM -  This circuit drives a motor clockwise / anticlockwise via a pot and reduces the speed to zero when the pot is in mid-position.  The current is limited to 200mA and the voltage across the motor is less than 6v, but the circuit shows the principle of Pulse Width Modulation (providing powerful bursts of current to the motor to create a high or low RPM under load) and both forward / reverse RPM via the H-bridge arrangement.  __ 555-Timer

Low Power H Bridge Motor Controller -  This circuit uses a few logic gates & a 74AC240 to control power to a small gear motor. . . Circuit by David A. Johnson P.E.-July, 2005

Low Voltage H-Bridge -  TTL type Q and inverted Q inputs control a classic H-bridge circuit, rated at 50 volts and about 10 amps.  The circuit can control power and direction of a DC motor. . . Circuit by David A. Johnson P.E.-February, 2007

Microcontroller drives H bridge to power a permanent-magnet DC Motor -  15-Mar-07 EDN-Design Ideas Improved H-bridge requires only two driver signals__ Circuit Design by Luca Bruno, ITIS Hensemberger Monza, Lissone, Italy

MOSFET based H-Bridge controller for DC Motors -  To turn on any of the MOSFETs properly in your circuit, the gate voltage has to be significantly higher than the source voltage.  For the lower position devices Q2 and Q4, the sources are grounded to 0V therefore they can easily turn on into "saturation" by applying a gate voltage of a few volts above ground. __

MOSFET H Bridge -  Schematic onlyno circuit desciption included __ Designed by Eugene Blanchard

Motor-control scheme yields four positions with two outputs -  02/07/02 EDN-Design Ideas Figure 1 shows how to position a mechanical device into four discrete positions but with only two free outputs and one free input from the control system.  The position depends on a set of cams and four corresponding limit switches.  The 24V-dc motor comes with a worm gear.  Darlington transistors Q3 to Q6 and resistors R7 to R12 form an H-bridge that drives the dc motor, M__ Circuit Design by Jean-Bernard Guiot, DCS AG, Allschwil, Switzerland

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

Reversing H-bridge -  This H-bridge variant was one of the first in which the reversing circuitry is built into the driver, rather than (as is more-commonly done) into the control circuitry upstream of the driver.  This is a handy circuit, though, for 2-motor walkers -as all that is required to reverse one is to reverse the phasing of one of the motors.   __ Designed by Wilf Rigter

Reversing H-bridge -  This H-bridge variant was one of the first in which the reversing circuitry is built into the driver, rather than (as is more-commonly done) into the control circuitry upstream of the driver.  This is a handy circuit, though, for 2-motor walkers -- as all that is required to reverse one is to reverse the phasing of one of the motors.  It is built from 4 transistors and a mux.   __ Designed by Wilf Rigter

Reversing H-Bridge for Small Motors -  Here's a simple switch circuit for reversing and stopping a motor without any control of speed. __ Designed by Richard Torrens

Self-Oscillating H Bridge Lights White LED From One Cell -  26-Nov-09 EDN-Design Ideas Circuit operates on batteries as low as 0.   6V__ Circuit Design by Luca Bruno, ITIS Hensemberger Monza, Lissone, Italy

Sensor Electronic Tracker with H-Bridge Drive -  I decided to make a commercial surface mount PC board using the LED2 sensor concept.  It is quite sensitive and can track to a few degrees of accuracy in bright sunlight.  If a blocking shadowis used the accuracy is better than 1/4 degree, that's about as good as you can get with an active feedback sensor.  The board is a tiny.7"x1.4" __ Contact: Duane C. Johnson

Servo Pulse to Dual H-Bridge -  interface performs vital control functions needed for propulsion and steering of a fighting robot __ Designed by Bob Blick

Servo Pulse to PWM -  converter connects an H-Bridge to radio control receivers or robotic circuits __ Designed by Bob Blick

Six-transistor H-bridge -  This is the six transistor "Tilden style" H-bridge; while not as old as the original "basic H-bridge, " this goes "way back, " and is the basis for many BEAM driver circuits __ Designed by Wilf Rigter

Z-bridge -  A Cheaper H-Bridge Designthe Zoelen Bridge (Z-Bridge)  __ Designed by A.A. van Zoelen's

Zoelen Bridge Z-Bridge -  A Cheaper H-Bridge Design the Zoelen Bridge (Z-Bridge)  __ Designed by Wilf Rigter


H-Bridge Circuits
 

 


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