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Questions tagged [l298]

Anything related to the L298 integrated circuit. The L298 is a high voltage, high current dual full-bridge driver designed to accept standard TTL logic levels and drive inductive loads such as relays, solenoids, DC and stepping motors.

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DC Motor bridge driver L298N. Why separate the tracks after R sense resistors from GND plane?

The L298N datasheet says: The sense resistor, not of a wire wound type, must be grounded near the negative pole of Vs that must be near the GND pin of the I.C. why not in common GND plane? If I ...
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62 views

speed control PWM, DC motor, L298n with LPCxpresso 1549

this is my first post and I'm just asking a little bit about motor control in a team project, where I'm member of. This is a bit of a "not so serious" project so probably the solar panel system ...
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1answer
166 views

Review of PCB design L298n

I'm decided to finally make my motor driver boards but I'd be happy to have some feedback as it's my first PCB design. It's mostly based on the datasheet of the l298n chip. So there is nothing much ...
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1answer
84 views

DC motor driver response [closed]

I have some trouble about the response of the L298N DC motor driver. After some experiments, I have noticed that the output response of the L298N isn't linear. In particular, if i give a ramp input ...
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2answers
60 views

Is the 5 V rail of an LM298 reliable?

I’m trying to build a simple robot using 4 DC motors with 2 LM298's controlled by node mcu and powered by LiPo 3s battery. Since powering the node mcu directly to the 3s LiPo(11. Iv) would be ...
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4answers
2k views

Why don't flyback diodes in H-bridge damage power supply?

I'm currently learning about driving a small DC motor (~ 5V). My research so far indicated that a L298N might be a good choice to quickly get something up and running. However, I'm also trying to ...
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1answer
234 views

What PWM Frequency should be used for a 12V DC Gear motor?

I have this 12V DC Gear motor, but I can't find much info about it online. The reason I have bought it was that I found this particular motor across several tutorials on how to build an RC car. I ...
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177 views

L298N motor driver module, +5v pin

I'm planning to make a rc car with l298n motor driver module. I read about this module on internet all the day. I understand how to work with it. But I can't understand about +5v pin in the module. ...
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2answers
432 views

Voltage lower than expected with Nema 17 stepper motor and L298N

I am using an L298N motor driver with a Nema 17 stepper motor. I am trying to use the motor to turn a valve, but there is not enough torque so the motor is skipping steps. I am controlling the motor ...
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285 views

Diagram of L298N with Arduino

1- Am I correct in my schematic if I want to connect L298N to arduino to drive 2 motors ? 2- are the resistors of 0.5 ohm mandatory ? (I saw them in datasheet) 3- Am I missing components in ...
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3answers
351 views

Powering Stepper Motors Using Drivers

I am working on a project involving several stepper motors, I have chosen the L298N as the driver - and my system supply is a switching power supply 12V 15A. My question is, how can I connect the ...
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0answers
240 views

L298 distorts signal

I connected STM32 F334R8 microcontroller to L298 H-bridge. I made some measurements. The problem is output signal on L298 has quite slow slopes and is not as sharp as input signal. I do not understand ...
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1answer
64 views

Will this N-Channel Mosfet work as high-current motor controller?

We are building a mobile robot which will use two motors in a differential drive configuration to maneuver and move around, and we want to choose the right driver IC or transistor circuit for the job ...
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2answers
5k views

L298n PWM frequency

I'm using the L298 Dual H-Bridge to control a pair of 6V @ 1600mA DC motors for a line follower robot. I'm connecting "Enable A" and "Input 1" to Vcc and "Input 2" to uC with PWM. Which frequency do ...
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1answer
893 views

L298N (via 74HC595) motor control - unexpected voltage & motor not spinning

(Corrected version as last text was somehow corrupted) I have made a circuit with L298N in order to control direction of 2 DC motors. When I power the circuit I noticed that voltage between 2 output ...
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1answer
169 views

Confusion about L297 pins

I'm developing the PCB of my L297-L298 stepper motor driver, but I have a doubt about the SENSE pins of the L297 I.C. I understand that the pin 13 and 14 of the L297 are used for controlling the ...
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2k views

Powering 2 servos with 5v output of L298N dual motor driver

I am using L298n Dual Motor Controller to control two dc motors for my robot. But I want it to power the servos too. I have created this circuit design. can I power the SG90 Servo with L298n? Is ...
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1answer
527 views

NEMA17 Stepper motor not turning, but making very little noise [closed]

I have a NEMA17 stepper motor (2 Phase, Rated 12V, 1.2A/Phase) and I am trying to make it run with an L298N and a Raspberry Pi. Everything is wired up as shown below in the pictures. I use a 12V, 2A ...
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1answer
2k views

Selecting pwm frequency for speed control of a dc motor?

I am using L298 motor driver to drive motors (12v , 900mA),I am using PWM to control motor speed but the problem is 1.When I set PWM frequency to 100 Hz motor work with jerks no noise at all. 2....
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0answers
116 views

How to fix missing 1v power for 12v solenoid using l298n?

I have a 12v solenoid connected to the l298n, which is connected the raspberry pi. I put a 12v input for the l298n bridge, (multimeter reads 12.05v), however when activated, the voltage on the pins of ...
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2answers
241 views

L298 driver for two different DC motors

I have a L298N and I want to use it to drive two DC motors. The problem I face is that one motor is working at ~7.2V and the other one at 3.3V (it's a car, the 3.3v motor is used for steering). I will ...
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2answers
264 views

Servo conflicting with other dc motors

I am using the L298N motor driver for a robotics project to control 4 motors. 2 in each input and output terminal. I have this connected to an arduino uno which is powered by about 7-8v from nimh ...
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1answer
469 views

How should I power my robot using 7.2v [closed]

I am extremely puzzled on how to power my robot correctly. I would like to use 6 rechargeable aa batteries, 1.2v and 1300mAh each, to form 7.2v to power it (since it is what I have purchased and have ...
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2answers
87 views

Will this power source and setup work?

I am aware the arduino requires at least 250mA and to power several components 1 amp would be better. source [http://playground.arduino.cc/Learning/WhatAdapter] This is a motor the driver I am using ...
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0answers
351 views

Why are the power pins on an L298 H-Bridge named “Vss” & “Vs”

I understand that Vs is where the H-Bridge gets it's power for driving the motors and that Vss is used for driving the logic, and they both sink to a common ground named "GND". My question is why are ...
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1answer
308 views

Why dc motor is buzzing when using it with XL6009 converter?

I have the following scheme RPI, L298n with 6v DC motor. I'm trying to add a XL6009 boost converter but set to boost 5v into 6v but sometimes the motor is rotating and sometimes is buzzing. Does this ...
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2answers
1k views

Current chopping with an h-bridge and PWM

I have some stepper motors and L298N dual h-bridge drivers. I can't find exact specs for the steppers,* but similar motors from another product line have rated voltages from 2.64v to 5.8v. Since most ...
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2answers
629 views

Why are the capacitors on the image being used with the DC motor?

Why are the capacitors on the image being used with the DC motor? For my arduino aplication with L298n is ok to keep or remove them?
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1answer
311 views

Mosfet to save power

I am making a battery powered project which involves bi-directional motor control. However motor needs to turn rarely (about 10-20 seconds in 24 hour period). I am using L298 motor driver. However the ...
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2answers
778 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
465 views

How to put these together and do I need a PWM expander?

I'm having here an Atmega8 a PSM42BYGHW603 stepper motor the L298 stepper motor driver and ...
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2answers
2k views

Trouble with L297 pins

So I am having trouble with a circuit I am building for a stepper motor controller, I am currently following this schematic My problem is that I don't really know what the Vref, control, sync and ...
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1answer
714 views

L298 high side driver: how does this actually work?

I recently took another look at the L298 since some students were having problems (due to the commonly discussed high V_CE-on of the combined high side and low side drivers). One thing that struck me ...
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2answers
9k views

L293, L298 and SN754410 H-bridge drivers on low voltage power supply

This question is about the following three integrated H-bridge drivers: - L293 or L293D (D = protection diodes added) SN754410 (protection diodes included) L298 (no protection diodes) Time after ...
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1answer
2k views

Two L298N for two stepper motors

I have two stepper motors (ripped from old scanners) and two L298N ICs. I have to connect these motors to the STM32 MCU, and I'm going to use this scheme: I want to make one board for two motors just ...
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2answers
408 views

L298 dual H-Bridge RDS(on)

I am working on a project that mandates the use of a particular Arduino motor driver shield, which makes use of an L298 dual H-bridge (datasheet here) I need to perform some power calculations in ...
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1answer
3k views

Removing jumpers from an L298N Dual H-Bridge

I've got an L298N dual H-bridge which I'm using to control two DC motors with an arduino. I want to be able to control the speed of the two motors using PWM. My understanding is that I need to ...
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1answer
7k views

L298 IC motor driver - how to wire and use correctly? [duplicate]

EDITED. I found that my supply of 3V was insufficient as there are voltage drops across the transistors. I replaced the 3V supply with 4.5V and the motor ran fine - although now my 3V motor has 2.5V ...
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2answers
919 views

Having trouble with L298N H-Bridge IC

I cannot understand how this IC works from the block diagram given in the datasheet. I understand the concept of an H-bridge, but cannot figure how this one operates. I drew on the schematic to ...
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1answer
1k views

Current limiting on a stepper controlled by L293D on an arduino board

I currently have a bipolar stepper motor connected to a l298n, with one resistor to each coil. The problem is it draws a lot of power when there is no need to, and limits the maximal power of the ...
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1answer
4k views

24V H-Bridge DC motor, why voltage drop to 3v if motor connected

I want to drive a DC motor using an L298N H-Bridge Driver IC. I'm using the schematic from this website: The motor is 24 V with about 7.5 ohm impedance (thus, it draws about 3.2 A). I'm using a 24V ...
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2answers
3k views

PWM vs. PPL in L298 motor controller

I am currently developing a small robot project. The motor driver I have uses a L298 motor driver IC. It supports two methods of control, PWM and PLL and it is configurable with on-board jumpers on my ...
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1answer
4k views

Arduino Motor Shield R3 Current sensing

I am trying to use current sensing functionality of Arduino Motor Shield R3, the shield is based on L289. The values that I read seem to be very noisy. I am using Arduino UNO A0 analogRead() function ...
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0answers
1k views

L298N shield gives relatively low ouput voltage and current

I am using a L298N shield together with an Arduino to drive a 42mm 2 phases bipolar stepper motor. The driving voltage for the motor is 12V and the logic voltage for Arduino and the L298N shield is 5V....
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1answer
1k views

L298 Flyback diode connects to ground

On the L298 datasheet (http://www.sparkfun.com/datasheets/Robotics/L298_H_Bridge.pdf), the Bidirectional motor control application example (Fig 6) shows that the need to be two diodes connecting the ...
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1answer
3k views

L298 overheating issue

I'm trying to build a motor driver which can supply ~3A per motor. Only cheap IC I could get my hands on was L298, so I decided to parallel its channels. But for some reason that I can't understand (I'...
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2answers
8k views

L298 output voltage is too low

I'm trying to use an L298N and an Arduino UNO R3 to drive a bipolar stepper motor. To simplify things, I'm just trying to get a 12v output from either output-1 or output-2 of the l298 (then I can ...
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2answers
1k views

What components do I need to build a motor controller from the L298?

I'm thinking of buying a pair of L298Ns, to control a pair of 1.6A motors. I'd like to control each motor with a signal PWM wire and a direction wire. However, I've hit a couple of problems. It is ...
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2answers
2k views

How many control pins needed for L298N H-Bridge?

I have a simple robot with two DC motors. Using the L298N Dual H-Bridge, what's the minimum number of control pins I can use to give me forward, back and turn? Here's a typical setup for the chip. It ...