A circuit which allows power to be applied to a load in either direction. Often used for reversible motor control.

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Will back emf damage a lithium ion battery?

I am prototyping a battery-operated toy containing a couple of motors - these motors are driven by a pair of h-bridges which are controlled by a micro controller. I'm running this whole thing from a ...
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1answer
47 views

H-bridge problem with TIP122.

I tried to make H-bridge by TIP 122 transistor. I used 9V for a VCC. I used push button to control H-bridge, and it's fine. Then I used Arduino 2560 with two digital pins for driving H-bridge. But the ...
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0answers
44 views

How to generate the gate voltage for the P-channel transistors for an H-bridge controller

I would like to create an H-bridge out of discrete N and P-channel transistors as a nice demo of the concept for a high school course. The driver is to be an Arduino should that affect your design ...
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1answer
27 views

What is the difference between an H-Bridge Motor Driver and Dual motor driver board?

I don't understand the difference between a motor-driver like this IC H-Bridge Motor Driver and a motor-driver like this Dual Motor Driver Board. When reading about them they do the same thing but the ...
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3answers
99 views

Soldering, Chips for Beginners

I am currently running a club for kids (9-11) for Arduino and we are making a robot and are moving on from motor/transistor drivers to half-hbridge (so we can go backwards). The kids are learning to ...
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1answer
36 views

AVR's and DC Motors\Servos

I've been browsing around looking for some information on motors\servos and AVR's (my MCU of choice). Motors\servos are in my gray area, meaning I'm still not too into them, but I could do something ...
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20 views

PWM capable H-bridge, best low side drivers

Im trying to make a high current h bridge 24volts around 60amps to start off with however I might decide to up it 120amps continuous if I can easily. I have already made a simple high side mosfet ...
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53 views

Forgot to connect ground for H-bridge, now it doesn't work?

I have an TLE5206 h-bridge IC that can handle 5 amps and I'm giving it a supply voltage of 12V. I was just testing the motor with the power connected but I noticed that the ground cable broke off ...
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1answer
41 views

Relay-like digital potentiometer?

I'm sure I'm not the first person to want to control an AC motor with their microcontroller and I've found a good relay module to use, however, I still want to be able to control the voltage via the ...
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4answers
114 views

Connecting two power supplies with same voltage rating to increase current output?

My h bridge requires 5v 1 amp. I have a 5v 500mA and another 5v 850mA power supply lying around. Can I join the +ve of both and send that signal to the h brdige so that it can have enough current of 1 ...
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5answers
422 views

Can someone check over my schematic?

This is the first schematic I have made that was not a simple LED. I want to know if it seems good before I go and build it (and buy the parts). Here is the schematic: Here are a few of my ...
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2answers
86 views

Measure current through H-bridge using shunt

I am trying to measure the current through the H-bridge and brushed DC motor and shut it off if it exceeds a pre-set limit. This is how I have it currently set up: simulate this circuit – ...
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2answers
288 views

Level shift circuit MCU to MOSFET

I have a H-bridge that is being supplied by 12V and using around 10A. I am turning it on/off with a microcontroller that has an output of 0V-5V. The switching frequency is "super low" so the gate ...
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1answer
45 views

H-Bridge Power Supply Erratic Behavior

Description: I have built a copper plating tank to plate circuit boards and am using a technique called Reverse Pulse Current plating to help aide in the copper plating process. What that involves is ...
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2answers
81 views

Boost converter as high-side MOSFET driver

I have a circuit where microcontroller drives a H-bridge which is powered from 12V. I am having a problem with driving the high-side MOSFETs. I will be turning the H-bridge on/off only couple of times ...
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1answer
125 views

Why to double reverse diodes in parallel to MOSFET?

I am building an H-bridge by this article. In the H-bridge MOSFETs IRF9530 and IRF530 used. By datasheet of Vishay both of MOSFETs have reverse diode inside the package. So by proposed schematics ...
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1answer
81 views

Reverse recovery time of Schottky diodes

I am considering redesigning a IR2110-based H-bridge driver with 1N5819 because UF4007 he ...
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2answers
71 views

What will happen if I inject rated output voltage into secondary of a single phase transformer?

I have a mains rated transformer that takes 220V and gives me 12V. Now what if I connect it to a H-bridge drawing power from a 12V car battery like this? simulate this circuit – Schematic ...
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2answers
73 views

Using an L298 to drive 2 unidirectional and 1 birectional motor simultaniously

First up I am not an EE and am fairly new to this, so please forgive my ignorance. I have a project that requires me to control 2 unidirectional and 1 bidirectional brushless DC motor at the same ...
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1answer
51 views

Choosing bootstrap capacitor for MOSFET driver

I have IRS2011 high/low side MOSFET driver, for driving IFRZ44N MOSFETs configured in H-bridge. How would I calculate the bootstrap capacitor required by the IC for driving high-side? I am aware of ...
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2answers
108 views

H-Bridge flyback diode selection?

I am wanting to make a motor driver using a SN754410 Quadruple Half-H Driver IC. The SN754410 requires external flyback diodes. Here is an example circuit: My question is, how do I choose which ...
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1answer
95 views

Boost 5V to 18V: charge pump + LDO or conventional boost converter?

I am trying to build a H-bridge driver using discrete parts. Now I have a problem regarding generating the 10+V gate voltage for the NMOSFETs I used. The H-bridge and its controls is like this: ...
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1answer
91 views

H-Bridge vs Mechanical Speed Controller

What's the difference and trade-offs between a h-bridge motor controller and a mechanical speed controller for controlling a brushed motor in an RC car? I have a cheap RC car that I'm trying to ...
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1answer
154 views

How to Run 12v 1A Electromagnet From Arduino (3v) Without External Power Supply

I have a project that I am working on that uses a micro controller to control an electromagnet that I want to run with a 3.7 volt battery. I would like to reverse the polarization on the electromagnet ...
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1answer
82 views

High Power H-Bridge with IR2125 Drivers Problem

I'm currently stuck on a problem when trying to drive a 140V DC motor using an H-Bridge with 4 high-power mosfets and 4 IR2125 drivers. I'm using as input to the drivers a signal generator of 5V in ...
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0answers
27 views

How to choose a single H-Bridge IC?

They all seem to pretty much offer the same features. On what basis am I supposed to compare single H-bridge IC's for a typical application of driving a smaller (<1A max) brushed DC motor, similar ...
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1answer
61 views

Bipolar stepper motor sequence, wiring and dual h bridge

Im facing some issues to figure out sequence of my bipolar(specifically) and unipolar stepper motor. However , I've managed to get Dual H Bridge but couldn't find out the example/documentation for the ...
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1answer
171 views

Over heating H-bridge MOSFET (irf9540)? [closed]

I have done the circuit in the picture : from here (modified Question): So two LEFT MOSFET (IRF9540 & IRF540) will be overcharged and so heating and DC motor speed is Constance and don't ...
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2answers
181 views

Latching solenoid control

I am working on a personal project that will involve driving a latching 9V/DC solenoid from an arduino. The circuit I've come up with is dependent on two things, that I haven't quite figured out yet: ...
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0answers
77 views

Driving high voltage MOSFET H-bridge

I am looking for suggestions on MOSFET transistors and logic for driving high voltage full H-bridge from a 5V PWM signal. I have a microcontroller that outputs a PWM signal 0V->5V. And with this ...
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2answers
210 views

Is my MOSFET H-bridge design correct?

Can anyone check over this motor controller design I made? I'm running off of a rudimentary understanding of electronics (just a hobbyist), so I'm not fully confident in it yet. Kamil EDIT: ...
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1answer
52 views

Torque control with H-Bridge via direction pin

Using the LMD18200 (H-Bridge) and the LM3524D (PWM regulator) I should design a torque regulation. I've found a circuit in the LMD18200 datasheet which uses the current feedback to adjust the PWM. ...
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1answer
88 views

Equivalent of IR2155

I build a circuit based on IR2155, but it's not so readily available in my area. Is there an equivalent IC for IR2155?
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87 views

Anti-Parallel Diodes and H-Bridge

Does the anti-parallel diode forward voltage in a single phase inverter need to be lower than the body diode of the MOSFET? I have MOSFETs with a forward voltage of 1.2 Volts, and SiC diodes with a ...
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0answers
145 views

Using two half bridge drivers as a full H bridge - What bootstrap capacitor?

I'm trying to design a motor (brushed DC) speed controller circuit (to learn about such circuits). I decided to use two half bridge drivers (IR2184) to control my bridge. The circuit I've come up ...
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2answers
116 views

Will these heatsinks be sufficient for my mosfets?

I need to control 10 12VDC motors at ~25Amps, so I decided to make my own mosfet H bridges to control it ( with 2 n chan et 2 p chan ). I will need 10 H-Bridge, so 40 Mosfets. ( 20 n chan and 20 p ...
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0answers
59 views

change polarity of Solenoid

I am working on a project which includes a couple of Solenoids (Link to the used Solenoid: ...
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0answers
81 views

Relay voltage drop, a solution?

I simulated an H bridge with 2 relays and one motor in PROTEUS. Everything is 12 V and DC, I set relay coil resistance at 80 ohm ( I am replicating this : ...
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1answer
182 views

Bipolar stepper motor (Alfa Romeo 156 speedo) w/ L293D

I would like to use my Alfa Romeo speedo in my simrig, I have got the cluster pinout and the speed signal is coming from the ABS (Just like any other car, my BMW cluster works like charm). The only ...
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2answers
128 views

Basic h-bridge motor driver circuit for audio PWM waves with possible negative voltage

I need to control a DC motor with the PWM audio waves coming out of the audio jack of a device. The device will send a positive PWM to drive the motor forward and a negative PWM signal for driving it ...
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0answers
75 views

No output at H bridge during quick power drop

I used a H bridge with PMW control to drive DC motor in two directions. I observed a strange phenomenon that during quick voltage drop, the PWM output at M2 is cutoff, although the T4 gate PWM input ...
2
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1answer
90 views

H-Bridge with Darlington BJTs, static shoot-through

I have built the following H-Bridge with TIP122 and TIP127 Darlington BJTs: It is made from parts I had around, and I plan to use it for currents up to 2A with a VCC of 12V. Note that 1N4937 ...
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2answers
66 views

Commanding numerous motors with one H-Bridge

Is it possible to command more than one motor with an H-bridge like this: Would this work in real life if I replace switches with transistors and command them?
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1answer
99 views

External power supply necessary to run two stepper motors from a RPi?

I am following this tutorial for a CNC laser engraver. I have two stepper motors from some old DVD drives and two L9110S H-bridges to control them. I am now working on putting it all together and ran ...
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1answer
375 views

MOSFET based H-Bridge Circuit

Okay really need help on constructing a MOSFET based H-bridge circuit with a switch. I've got two p type and two n type mosfets. I understand you have to apply voltage to the gates to turn the ...
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1answer
162 views

Commanding a 12V DC motor with high power (~20A)

I'd like to control a 12V DC motor but it has very high power, around 20A. I was looking for H-bridges but they all support only low power (around 1A) Do I have to build my own H-bridge with high ...
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1answer
75 views

Using an H-Bridge like a comparator

I'm wondering if there's a way to use an H-bridge like a comparator- That is, if one input is greater voltage than the other, then the attached motor spins one way, and vice versa, and it doesn't spin ...
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2answers
36 views

School Task with NTC

I need to solve the task shown on the picture. The first part is to calculate the temperature (in °C) from the NTC when Uv = 2V is. This means Iv is infinite. The given Values are: Uq = 12V, R1 = ...
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1answer
182 views

How to build an H-bridge using MOSFETs? [duplicate]

I want to reverse the polarity of my current source, which is a capacitor in this case, in the middle of discharging phase. Also the capacitor bank is being discharged through a coil to make a short ...
4
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1answer
172 views

Do AC inverter H bridges ever get driven this way?

There's a google competition going on at the moment called the little box challenge. It's to design a very efficient AC inverter. Basically the inverter is fed a DC voltage of a few hundred volts and ...