Another week has passed for the challengers of the Pi Chef Design Challenge, bringing us up to week six!  We’ve had some excellent updates in the past seven days and I would like to highlight a few of them, but before I get started let's take a moment to learn more about this challenge.



Pi Chef Design Challenge


About The Challenge


Featured as the first design challenge of 2018, the Pi Chef Design Challenge opened for project idea submissions in October of 2017, which was met with many submissions from community members. As I mentioned earlier, the challenge is based around the Raspberry Pi 3 Model BRaspberry Pi 3 Model B SBC. Challengers have eleven weeks to develop their project, and share their progress in a series of weekly update post. By posting a minimum of ten update post, challengers become eligible to win several awesome prizes, and the chance to become one of our prestigious design challenge winners.



Entering the challenge is not limited to just the ten chosen community members though,  anyone can join the Challenge as a non-sponsored Challenger. Here's how: Simply get buy  a Raspberry Pi 3 model B and integrate it into your project, as well as post 10 blogs chronicling your project’s progress into  the Pi Chef Design Challenge space (tagging your blogs 'IoT on Wheels'). All Challengers must build their projects in accordance with the Challenge's terms and conditions, and all projects must include the Raspberry Pi 3 Model B.



The Official Kit, and The Prizes


On January 10, 2018 Element14 announced the 15 community members that were picked to participate in this challenge, and those challengers received a kit of sponsored components to use in their design which was based around the Raspberry Pi 3. If you would like to purchase the official kit, click here.


Each kit contains the following items:


To learn more about each of these components or to purchase them to use in your own project, visit the official kit announcement at the links above.


Each challenger is competing to win one of three prize packs that feature the following prizes:


Grand Prize

        • Breville Barista Express Espresso Machine
        • $1500 USD Newark element14 / Premier Farnell Cart

Runner Up

        • Whynter Ice-Cream Maker
        • $750 USD Newark element14 / Premier Farnell Cart

Third Place

        • Breville Tea Maker
        • $500 USD Newark element14 / Premier Farnell Cart


A finisher who has completed their project, used the Raspberry Pi, posted 10+ updates in the Pi Chef space and adhered to the requirements in the Terms and Conditions will receive a mystery package of element14/Premier Farnell products valued at $65 USD.



The Past Week In Review


Over the past 7 days, February 18th - February 24th, we have had a total of seven updates posted across six projects. That’s almost double the number of updates from the previous week so take a look at which projects were updated this week!




This Week’s Top Updates



Project: S.H.E.L.F. - Pi Chef Blog #6 - Labels



Claiming the top spot this week is project S.H.E.L.F. by Milos Rasic (milosrasic98). The project’s sixth update centered around Milos detailing the labeling method he is using to help identify objects on his smart shelf. “The label consists of a bright pink outer rim, I use it so i can identify where the label is exactly,” he wrote. "After that there are the smaller circles the combination of numbers of yellow and green circles gives me a code which I then can compare to a pre-made list and see what's on the label.” The post goes on to show how he is using open CV to decode the labels, and how to tweak the code to better discern between labels.


This is once again one of those moments where a design challenge project has parallels with a project I have recently been working on. Just last week I spent most of a day investigating the possibility of using labeling to identify 3D printer filament via computer vision to help me sort and track my inventory. This was a great insight into how that might be done if I decide to tackle the project in the future. Head over to the link above to read the entire post.



Project: Bake Mate - Pi Chef Blog #5 - Testing the weighing scale: load cell + HX711



Once again Avner Fernandes (hans_ober) has managed to put together one of the more interesting project updates of the week, and has earned the second spot in this weeks summary. In the fifth update of project Bake Mate, Avner devoted his time to getting the load cell that will be used to measure the weight of the ingredient bowl up and running. Using an standard load cell,  HX711 ADC in conjunction with the HX711 library for python he was able to get an accurate weight measurement using the boxes from the boards provided in the challenger kit as ballast. “I tested out the weighing scale with a couple of weights ranging from 100gm to a kilogram. I did another test where I stacked and removed weights in order to see how the precise the reading was, and it was generally within 10 grams for a stacked weight exceeding 500 grams,” he wrote.  You should definitely head over to the full post to find out more about how this system works. Also, how awesome is that photo I posted above? That should be made into a poster or something as it personifies what a maker is!



Project: The Spice of Pi - Pi Chef Blog #3 - Glenn - Python GUI



After spending some time playing with Google Assistant, The Spice of Pi Co-Author, Glenn Vander Veer (glennvanderveer) got to work on the systems user interface, and began searching for a decent, easy to use, drag and drop UI creator for python, but that search proved futile, and Glenn decided to go with guizero, a library for Python 3 that makes creating simple GUIs easy. It’s basically a wrapper for Tkinter, and abstracts away the more challenging parts of creating an interface with Tkinter. Find out how well guizero worked for Glenn at the link above.



That is going to wrap up this weekly summary of the Pi Chef Design Challenge. Remember to check back each and every week for the duration of this challenge for a summary post from the previous week’s updates. If you would like to learn more about this challenge, and to see what progress has already been made, head over to the its official challenge page, and if you would like to follow what I am up to these days, follow me on Instagram. I will see you next week, and as always, remember to hack the world and make awesome!


Weekly Summaries About This Challenge

  1. Design Challenge Weekly Summary: Intro to the Pi Chef Design Challenge
  2. Design Challenge Weekly Summary: January 14 - January 20, 2018
  3. Design Challenge Weekly Summary: January 21 - January 27, 2018
  4. Design Challenge Weekly Summary: January 28 - February 3, 2018
  5. Design Challenge Weekly Summary: February 4th - February 10th, 2018
  6. Design Challenge Weekly Summary: February 11th - February 17th, 2018
  7. Design Challenge Weekly Summary: February 18th - February 24th, 2018
  8. Design Challenge Weekly Summary: February 25th - March 3rd, 2018
  9. Design Challenge Weekly Summary: March 4th - March 10th, 2018
  10. Design Challenge Weekly Summary: March 11th - March 17th, 2018
  11. Design Challenge Weekly Summary: March 18th - March 24th, 2018
  12. Design Challenge Weekly Summary: March 25th - April 1st, 2018