Sarah Al-Mutlaq

Member Since: May 14, 2014

Country: United States

A look into our awesome solar array and what it's doing for SparkFun.

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A fun holiday project to try for anyone looking to catch Santa on Christmas!

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Show us what you can make out of reused parts!

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Adding a Timed Button to a Project

July 29, 2015

This tutorial will walk you through making a timed power controller for interactive projects. You will learn how to add an on button that will provide power to your project for an amount of time and then turn off again.

Soil Moisture Sensor Hookup Guide

July 23, 2015

A quick hookup guide and project to get you started with the Soil Moisture Sensor from SparkFun.

Load Cell Amplifier HX711 Breakout Hookup Guide

June 11, 2015

A hookup guide for the HX711 load cell amplifier breakout board

Getting Started with Load Cells

June 11, 2015

A tutorial defining what a load cell is and how to use one.

Origami Paper Circuits

May 26, 2015

A quick tutorial to get you started in the world of light up origami flowers.

RedBoard Santa Trap

December 25, 2014

A fun holiday project to try for anyone looking to catch Santa on Christmas!

Soil moisture-sensing by hacking a solar light

June 19, 2014

How to take a solar powered pathway light from a hardware store and make it into a crude soil moisture sensor.
  • This is a common problem that is hard to diaganose like this, I would recommend calling into customer service or tech support and having them walk through it with you. Otherwise you can read some of the other people’s comments here and see if any of their tricks will work for you as well.

    Customer service number: 303-284-0979 Email: customerservice@sparkfun.com

    Sorry I couldn’t be of more help.

  • Hey Ethan, To get your calibration factor run this calibration code first, and put on a known weight, and change it until the output reads the actual weight.

    As far as changing the value to grams, you would need to change the “lbs” to “kg” in the code (found here) where it says:

    “Serial.print("Reading: ”);

    Serial.print(scale.get_units(), 1); //scale.get_units() returns a float

    Serial.print(“ lbs”); //You can change to kg but you’ll need to change the calibration_factor"

    But like it says, make sure that when you calibrated it if you used a 0.25 Kg weight, make sure it read out “0.25” (though the calibration will say lbs, but that is fine, that’s just the name not linked to anything else). Hope that helps!

  • It might be, to make sure you should call/email customer service/tech support so that they can walk through if it is broken, and possibly get you a new one if it is.



    I hope that helps!

  • Hello, I have found that it does matter which is hooked up to B and R, so If you know for sure that the wire you have hooked up to W is the “center tap” then try switching the other wires. No the load sensor should work fine off of the Arduino power, the black and yellow wires you are seeing in that picture were to power a LCD screen since I hacked the scale to use it’s load sensors. Along with the the load sensors, and the combinator board, make sure you have an HX711 amplifier board, because otherwise the output is too small for your Arduino to detect. I hope that helps! If you are still having issues, please feel free to call or email our customer service/tech support, so that they can help you in person, and walk you through any issues you may still be having!

  • You could do this with some Bluetooth boards, sending data wirelessly that way, we have a great tutorial to get you started with that Here. You could also use Wifi, and Here is a good tutorial on getting started with that. There are also lots of other ways that you could get creative, so I would look into wireless technology it’s all pretty cool! I hope that answers you question and helps you a little!

  • That’s fine, of course! I did actually end up soldering wires to the HX711 but then just plugging into the RedBoard (or arduino). To make it easier for me I soldered jumper wires in, but that’s a little more unusual. Unfortunatly you do have to solder to the HX711, since headers are not included on the board, if you have never soldered before we have tons of great tutorials on it (like this one on through hole soldering) and I would highly recommend taking a look at them. I hope that helped!

  • This is true, I didn’t catch it, and I would have done another take if I had. And thank you for the info, I will be sure to include more of that info into my next script. Mostly the changes this round were to some mistakes on the silk-screen, and to the build process for our new machines. If there were more things that affected you I would have added it, this video was just saying that they are back in stock and selling again. ^_^

  • Cool, glad you’re making progress. And thank you, we love your feedback and are here to help =)

  • Looking into the example code we posted for the HX711, they aren’t any interrupts that would conflict with yours, so my gut is that should be able to, but I have not tested this, and again I don’t know what your code looks like exactly, so yeah, I would definitely contact Tech support. Here is the direct tech support contact page for info, so you don’t have to go through customer service first: https://www.sparkfun.com/technical_assistance

IoT CloudCloud

Sarah Al-Mutlaq 16 items

Parts used in the third Fellowship of the Things episode:...

IoT Fridge Camera

Sarah Al-Mutlaq 34 items

The main parts we used in IoT episode 4. To build this...

Soil moisture sensor parts

Sarah Al-Mutlaq 6 items

The soil moisture sensor is made from parts in the Sparkfun...

Adding a timed power button

Sarah Al-Mutlaq 8 items

These are the parts you will need for adding a timed power...

Soil moisture sensor add on

Sarah Al-Mutlaq 9 items

List of parts I used to make my self watering system that...

Light up origami flowers

Sarah Al-Mutlaq 5 items

All the electronic parts needed to get you started on making...

Soil moisture sensor parts kits

Sarah Al-Mutlaq 2 items

The soil moisture sensor is made from parts in the Sparkfun...