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.

Continue reading

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

Continue reading

Show us what you can make out of reused parts!

Continue reading


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.
  • You can email customerservice@sparkfun.com, that is a better way to reach people who can help you right away.

  • So you have the 200kg disc load cell between two boards (or something akin to that) hooked up with a amplifier board and to a micro controller? What kind of micro controller are you using, RedBoard? Arduino Uno? Pro Mini? Just trying to get more info to try and find the problem. Are you thinking that the amplifier board is defective? We can try to test a few things but I personally don’t know how to test that it is working, though if you suspect it isn’t, you can call customer service and they can look into sending you another. Sorry you are having issues!

  • Yeah sometimes my mouth says things faster than my brain actually processes it. Let’s just say I meant to say “How much water is between the moisture sensor.” lol =P

  • Hey Ali, Did you go through and set up the calibration code? You need this data to be able to put the right info into the example code. You can find the calibration code here. The code kind of explains how to run it, set it up, get a reading for 0 lbs, and then put a known weight of 10lbs and see that reading and then it will give you info to put into the example code. Let me know if that helps. Otherwise we can try some other things!

    Just so you know if you would like to call our customer service they can get you to our technical support team who would be happy to help you with your project and try to troubleshoot with you. Our number is 303-284-0979, give us a call if you like.

  • You are correct, I don’t know why I said 12, it indeed has 16 triggers, and can be reprogrammed to accept even more inputs with a little extra work.

  • It is. And don’t worry, I remembered to go to the bank.

  • Sadly we don’t keep a spare Dia around, she is one of a kind =P (Which means we would all be very sad if she fell off her huge box).

  • Hey Don, Great questions, the bar load cell in the Z formation is technically measuring both tension and compression (two strain gauges are in tension, two in compression when weight is applied to the top plate), this means that yes if you then wanted to measure tension being applied to the top plate the opposite strain gauges on the load ell would be in tension vs compression. So you would only need one load cell and one amplifier set up in the same Z formation. Now as far as the code goes (the calibration code), you might get some interesting numbers since that is not what it is meant for , I have not tested that and you may need to modify the code to include a number to calibrate a known value of tension as well. I’m not 100% sure on that as I have not tested it specifically. Let me know if you try it and how it works out, but mechanically it will work the way you want.

  • I agree! And they are very easy to use and can be small and compact when combined with a small battery. The stickers have resistors included on them so really you just have to stick it and it all works!

  • During my testing, it was accurate within 5 mm if you stayed withing the 100 mm range that it says is the most optimal.

Soil moisture sensor parts

Sarah Al-Mutlaq 6 items

The soil moisture sensor is made from parts in the Sparkfun Inve…

Adding a timed power button

Sarah Al-Mutlaq 8 items

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

Soil moisture sensor add on

Sarah Al-Mutlaq 9 items

List of parts I used to make my self watering system that goes a…

Light up origami flowers

Sarah Al-Mutlaq 5 items

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

Soil moisture sensor parts kits

Sarah Al-Mutlaq 2 items

The soil moisture sensor is made from parts in the Sparkfun Inve…