Comments on: Arduino with Load Cell and HX711 Amplifier (Digital Scale)

By: Sara Santos

Sara Santos — Mon, 23 Feb 2026 15:33:57 +0000

In reply to Mario M.

Hi.

Yes. You can use it with a proper reference to our site.

Regards,
Sara

By: Mario M

Mario M — Sun, 22 Feb 2026 10:21:42 +0000

Hello, I’m a student and this tutorial helped me to set up my project as a part of my bachellor thesis. Do you mind if I use the connection diagram image in my thesis? With proper reference and credit, of course 🙂

By: Sara Santos

Sara Santos — Fri, 17 Oct 2025 11:06:17 +0000

In reply to rein.

Yes, that’s right.
Not my best soldering job.
Regards,
Sara

By: rein

rein — Thu, 16 Oct 2025 19:25:51 +0000

damn, great article but that soldering hurts my eyes

By: Jeff

Jeff — Wed, 23 Jul 2025 21:09:38 +0000

Hello, my readings are spot on…except they are in the negative ( -100g). My bridge is orientated correctly. I tried removing the negative from the calibration code, but that makes the readings way off from actual. How can I correct this? Thanks for your help and time.

By: Sara Santos

Sara Santos — Sat, 25 Jan 2025 11:39:19 +0000

In reply to Peter Jonasson.

Hi.
Thanks for the suggestion.
I added a blank column between each side of the HX711.

Regards,
Sara

By: Peter Jonasson

Peter Jonasson — Fri, 24 Jan 2025 14:11:53 +0000

This is a fantastic article and a well-written guide! My students are finding it incredibly helpful.

If I could offer just a small suggestion—under the section ‘Wiring Load Cell and HX711 Amplifier to the Arduino,’ there’s a hookup table that might be a bit tricky for first-time circuit builders. Some of my students initially misunderstood the horizontal boxes as common connections, rather than each side of the HX711. As a result, they accidentally wired +5 to A+ and GND to E+, which led to some unexpected outcomes.

That said, this is still an excellent NERD TUTORIAL, and I appreciate the work you’ve put into it!

By: Ehren W

Ehren W — Thu, 12 Dec 2024 16:02:53 +0000

In reply to Ehren W.

I think I figured it out. Changing “int” to “double” in a few lines, and modifying the reading gets it to display to the hundredths place. I’d like it to only display to the tenths place. I’ll update if I find out how.

Specifically:
“int reading” and “int lastReading” (~line 30) get changed to “double reading” and “double lastReading”

“void displayWeight(int weight){” (~line 50) gets changed to “void displayWeight(double weight){”

“reading = round(scale.get_units());” (~line 90) gets changed to “reading = round(scale.get_units()*10.0)/10.0;”

By: Ehren W

Ehren W — Mon, 02 Dec 2024 14:44:45 +0000

Hi Sara,
Thanks for the tutorial, this is just what I was looking for. I got my scale up and running. I’m using a 50kg load cell and would like to display the weight to the nearest 0.1kg. Changing the label was easy, displaying a decimal is beyond my ability (I’m a biologist by training). Is there an easy way to make that change in the code?

Thanks

By: oluka samuel

oluka samuel — Sun, 05 May 2024 10:15:41 +0000

After placing a known weight am getting different values on the serial monitor with value should i consider to use for calculating my calibration factor