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Community => Gigs and Collaborations => Topic started by: nmateik on Jun 10, 2019, 08:49 am

Title: Creating Digital Ammeter Using Hall effect sensor/Nano/ mini display??
Post by: nmateik on Jun 10, 2019, 08:49 am
Good Morning,


I'm trying to create a digital ammeter using the Nano/Oled Display/Magnetic Hall effect sensor/ Ferrite Torroid. But I can't code for the the life of me. I need to write a program for this, any help with the program would be greatly appreciated.

Willing to pay.

Regards,
Title: Re: Creating Digital Ammeter Using Hall effect sensor/Nano/ mini display??
Post by: zwieblum on Jun 10, 2019, 09:30 am
Please post some images and datasheet of the components you have, also what you want to accomplish.
Title: Re: Creating Digital Ammeter Using Hall effect sensor/Nano/ mini display??
Post by: nmateik on Jun 10, 2019, 09:52 am
1) A3144 Hall Effect sensor
2)  Arduino Nano
3) SSD1306 mini OLED Display. 128x32
4) one Ferrite Toroid



The goal here is to create an ammeter that will have a wire running through the ferrite toroid, where the sensor is located. which will measure the magnetic field I imagine then the computer code will convert it into amps.

that's the goal.
Title: Re: Creating Digital Ammeter Using Hall effect sensor/Nano/ mini display??
Post by: zwieblum on Jun 10, 2019, 10:38 am
What's the budget? (most likely buying  clam ampmeter for ~ 50 bucks is cheaper and more reliable)
Title: Re: Creating Digital Ammeter Using Hall effect sensor/Nano/ mini display??
Post by: vlc0617 on Jun 10, 2019, 05:55 pm
It seems that the A3144 is an Hall Switch

https://www.elecrow.com/download/A3141-2-3-4-Datasheet.pdf (https://www.elecrow.com/download/A3141-2-3-4-Datasheet.pdf)

so, it can only be ON or OFF but has not an output proportional to magnetic field -> not suitable for intended ammeter use.
Title: Re: Creating Digital Ammeter Using Hall effect sensor/Nano/ mini display??
Post by: nmateik on Jun 10, 2019, 08:27 pm
What type of sensor should I use? What type is used in the multimeter with the clamp on the end of it?
Title: Re: Creating Digital Ammeter Using Hall effect sensor/Nano/ mini display??
Post by: wvmarle on Jun 11, 2019, 01:43 pm
A hall effect sensor will do just fine to measure a magnetic field, and it seems indeed many commercial sensors are based on using such sensors. You just picked the wrong part. That it has "hall effect" in the name doesn't necessarily make it suitable.
Title: Re: Creating Digital Ammeter Using Hall effect sensor/Nano/ mini display??
Post by: nmateik on Jun 12, 2019, 03:36 am
A hall effect sensor will do just fine to measure a magnetic field, and it seems indeed many commercial sensors are based on using such sensors. You just picked the wrong part. That it has "hall effect" in the name doesn't necessarily make it suitable.
I bought a new sensor so hopefully it works.
Title: Re: Creating Digital Ammeter Using Hall effect sensor/Nano/ mini display??
Post by: Paul_KD7HB on Jun 13, 2019, 05:28 am
There are more than 100 different types of ferrite toroids. Why do you think yours will do what you want?

Pauil