element14 Community
element14 Community
    Register Log In
  • Site
  • Search
  • Log In Register
  • Community Hub
    Community Hub
    • What's New on element14
    • Feedback and Support
    • Benefits of Membership
    • Personal Blogs
    • Members Area
    • Achievement Levels
  • Learn
    Learn
    • Ask an Expert
    • eBooks
    • element14 presents
    • Learning Center
    • Tech Spotlight
    • STEM Academy
    • Webinars, Training and Events
    • Learning Groups
  • Technologies
    Technologies
    • 3D Printing
    • FPGA
    • Industrial Automation
    • Internet of Things
    • Power & Energy
    • Sensors
    • Technology Groups
  • Challenges & Projects
    Challenges & Projects
    • Design Challenges
    • element14 presents Projects
    • Project14
    • Arduino Projects
    • Raspberry Pi Projects
    • Project Groups
  • Products
    Products
    • Arduino
    • Avnet Boards Community
    • Dev Tools
    • Manufacturers
    • Multicomp Pro
    • Product Groups
    • Raspberry Pi
    • RoadTests & Reviews
  • Store
    Store
    • Visit Your Store
    • Choose another store...
      • Europe
      •  Austria (German)
      •  Belgium (Dutch, French)
      •  Bulgaria (Bulgarian)
      •  Czech Republic (Czech)
      •  Denmark (Danish)
      •  Estonia (Estonian)
      •  Finland (Finnish)
      •  France (French)
      •  Germany (German)
      •  Hungary (Hungarian)
      •  Ireland
      •  Israel
      •  Italy (Italian)
      •  Latvia (Latvian)
      •  
      •  Lithuania (Lithuanian)
      •  Netherlands (Dutch)
      •  Norway (Norwegian)
      •  Poland (Polish)
      •  Portugal (Portuguese)
      •  Romania (Romanian)
      •  Russia (Russian)
      •  Slovakia (Slovak)
      •  Slovenia (Slovenian)
      •  Spain (Spanish)
      •  Sweden (Swedish)
      •  Switzerland(German, French)
      •  Turkey (Turkish)
      •  United Kingdom
      • Asia Pacific
      •  Australia
      •  China
      •  Hong Kong
      •  India
      •  Korea (Korean)
      •  Malaysia
      •  New Zealand
      •  Philippines
      •  Singapore
      •  Taiwan
      •  Thailand (Thai)
      • Americas
      •  Brazil (Portuguese)
      •  Canada
      •  Mexico (Spanish)
      •  United States
      Can't find the country/region you're looking for? Visit our export site or find a local distributor.
  • Translate
  • Profile
  • Settings
Sixth Sense Design Challenge
  • Challenges & Projects
  • Design Challenges
  • Sixth Sense Design Challenge
  • More
  • Cancel
Sixth Sense Design Challenge
Blog Sixth Sense - Load Cell PCB - GraffitiBot blog 8
  • Blog
  • Forum
  • Documents
  • Polls
  • Files
  • Events
  • Mentions
  • Sub-Groups
  • Tags
  • More
  • Cancel
  • New
  • Share
  • More
  • Cancel
Group Actions
  • Group RSS
  • More
  • Cancel
Engagement
  • Author Author: dougw
  • Date Created: 14 Feb 2019 7:15 AM Date Created
  • Views 1177 views
  • Likes 10 likes
  • Comments 5 comments
  • graffitibot
  • doug wong
  • load cell
  • sixth sense design challenge
Related
Recommended

Sixth Sense - Load Cell PCB - GraffitiBot blog 8

dougw
dougw
14 Feb 2019

image

I finally received enough parts to assemble the load cell signal conditioning circuit board.

The circuit schematic and PCB layout for load cell signal conditioning were covered in a previous blog.

The TE Connectivity FX1901 load cellFX1901 load cell will be used to measure the amount of fluid in the Graffitibot reservoir by weighing it.

It isn't clear which variant of load cell (in terms of full scale output) I have, so I will have to hook it up and see what the output looks like.

Also I am not quite sure how to mount the load cell - there are no obvious mounting fasteners, so I will have to test how it responds to force on various surfaces.

image

Here is what the circuit looks like in action:

You don't have permission to edit metadata of this video.
Edit media
x
image
Upload Preview
image

The signals take some time to settle down because I have a pretty severe low-pass filter on the signal - to minimize fluctuations due to fluid sloshing around.

The output voltage is slightly negative with no load - this is okay because the weight of the empty reservoir with motors in it will bring the signal above zero.

This is a good start to getting the custom PCBs working.

The next sensor will be the magnetic angle sensor.

 

 

Relevant Links

Sixth Sense Design Challenge: About This Challenge

Sixth Sense Design Challenge: Technical Documents

Sixth Sense Design Challenge

 

GraffitiBot Project Blogs

Sixth Sense GraffitiBot - blog 1

Sixth Sense - Kit Unboxing and Other Parts - GraffitiBot blog 2

Sixth Sense - Sensor Circuits - GraffitiBot blog 3

Sixth Sense - Interfaces - GraffitiBot blog 4

Sixth Sense GraffitiBot - System Interconnect - blog 5

Sixth Sense GraffitiBot - Wheels & Motors - blog 6

Sixth Sense GraffitiBot - ST Sensor Tile App - blog 7

Sixth Sense - Load Cell PCB - GraffitiBot blog 8

Sixth Sense - Magnetic Angle Sensor - GraffitiBot - Blog 9

Sixth Sense - LCD Interface - GraffitiBot - blog 10

Sixth Sense - Pump Controller - GraffitiBot Blog 11

Sixth Sense Main Drive Motor - GraffitiBot - blog 12

Sixth Sense Motor Controller Mods - GraffitiBot blog 13

Sixth Sense - RTD - GraffitiBot Blog 14

Sixth Sense Mechanical Design - GraffitiBot Blog 15

Sixth Sense GraffitiBot Motor Wiring - Blog 16

Sixthe Sense GarffitiBot - First Dry Run - Blog17

Sixth Sense GraffitiBot Hydraulics - Blog 18

Sixth Sense GraffitiBot Printing Graffiti - Blog 19

Sixth Sense GraffitiBot - Summary - Blog 20

 

  • Sign in to reply

Top Comments

  • dougw
    dougw over 6 years ago in reply to genebren +5
    I will use a hinged load plate where the hinge will prevent tipping but not take any of the vertical load.
  • e14phil
    e14phil over 6 years ago +4
    Most Canadian test weights ever.
  • dougw
    dougw over 6 years ago in reply to e14phil +4
    If you look really closely you might discern some of them were made in Slovakia. They make 6 million per year. Made from rubber and carbon black. They are also made in Canada of course. I have a multitude…
  • DAB
    DAB over 6 years ago

    Good update Douglas.

     

    DAB

    • Cancel
    • Vote Up +3 Vote Down
    • Sign in to reply
    • More
    • Cancel
  • dougw
    dougw over 6 years ago in reply to genebren

    I will use a hinged load plate where the hinge will prevent tipping but not take any of the vertical load.

    • Cancel
    • Vote Up +5 Vote Down
    • Sign in to reply
    • More
    • Cancel
  • genebren
    genebren over 6 years ago

    Great update on your design challenge project.  That load cell is a pretty cool format, but I can see where mounting it and keep the load centered over the load point is going to be a challenge.

     

    Good luck!

    Gene

    • Cancel
    • Vote Up +3 Vote Down
    • Sign in to reply
    • More
    • Cancel
  • dougw
    dougw over 6 years ago in reply to e14phil

    If you look really closely you might discern some of them were made in Slovakia. image

    They make 6 million per year.

    Made from rubber and carbon black.

    They are also made in Canada of course.

    I have a multitude of uses for them.

    • Cancel
    • Vote Up +4 Vote Down
    • Sign in to reply
    • More
    • Cancel
  • e14phil
    e14phil over 6 years ago

    Most Canadian test weights ever.

    • Cancel
    • Vote Up +4 Vote Down
    • Sign in to reply
    • More
    • Cancel
element14 Community

element14 is the first online community specifically for engineers. Connect with your peers and get expert answers to your questions.

  • Members
  • Learn
  • Technologies
  • Challenges & Projects
  • Products
  • Store
  • About Us
  • Feedback & Support
  • FAQs
  • Terms of Use
  • Privacy Policy
  • Legal and Copyright Notices
  • Sitemap
  • Cookies

An Avnet Company © 2025 Premier Farnell Limited. All Rights Reserved.

Premier Farnell Ltd, registered in England and Wales (no 00876412), registered office: Farnell House, Forge Lane, Leeds LS12 2NE.

ICP 备案号 10220084.

Follow element14

  • X
  • Facebook
  • linkedin
  • YouTube