Hi, I'm trying to read position feedback by a linear actuator using Arduino Mega and a motor driver. I can see that the hall effect sensor is picking up the frequency of the input PWM from motor driver and causes false pulse reading therefore false position reading (I am using interrupts to read t…

SOLVED! The problem turned out to be a noisy PWM input from my motor driver. I was using "VNH5019A-E" and I switched to " BTS7960" and I do not get any noise on hall effect signal anymore and number of pulse counts reads perfectly accurate. Thanks for helping.

Hi, @msh911 Welcome to the forum. [image] How to get the best out of this forum IDE 1.x See also FAQ - Arduino Forum for general rules on forum behaviour and etiquette. Hello, Welcome to the Arduino Forum. This guide explains how to get the best out of this forum. Ple…

Thanks for taking the time. So the layout is pretty simple. Arduino Mega 5v pin is powering the sensor. another 5v pin of arduino Mega is powering the motor driver. And the motor driver gets it high power from a power supply of 12V and 5A and feeds its PWM to the actuator. Unfortunately I do not h…

"Where in the circuit is the gnd point for the scope probe? I could not follow this question. I am a Mechanical Engineer after all lol

[image] msh911: "Where in the circuit is the gnd point for the scope probe? The probe of the scope you used in the picture in post #1, has to have two connections, what were the two probe connections made too in the circuit? Thanks.. Tom... :+1: :coffee: :australia:

What is the orientation of the sensor/motor. Can you change that to test? I assume these are digital hall effect? Might try a metal shield between motor sensor/wiring ... It doesn't appear the magnetic field is doing this... :smiley_cat:

The scope probe is only connected to the Hall signal. did not know they have gnd too or if that matters. Is that going to affect how I scope the signal on the display?

the orientation is fixed by the manufacturer of the linear actuator. so I do not have access to that.

[image] msh911: did not know they have gnd too Everything is relative to something... It's only 5V is there is a ground (other path). It's common for birds to sit on HV lines... no ground (return) path, no current flow.. Your description seems to indicate you have it working. If you have n…

[image] msh911: The scope probe is only connected to the Hall signal. did not know they have gnd too or if that matters. Is that going to affect how I scope the signal on the display? Yes it will, you will have no project gnd reference for the signal that the scope is displaying. This will …

Hall Effect Sensor picking up Input PWM Frequency to the Motor

Other Hardware Sensors

TomGeorge January 26, 2023, 8:14pm 2

Hi, @msh911
Welcome to the forum.

Can you post a schematic of your project?
How are you powering the project?

Can you please post image(s) of your project so we can see your component layout?

Where in the circuit is the gnd point for the scope probe?

Thanks.. Tom..

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Hall Effect Sensor picking up Input PWM Frequency to the Motor

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