Another week has passed for the challengers of the Pi Chef Design Challenge, bringing us up to week eight!  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, March 4th - March 10th, we have had a total of fourteen updates posted across ten projects. I’m going to pick my three favorite updates from the week and highlight them below, but before we get into that lets take a look at which projects were updated this week!




This Week’s Top Updates


Project: Stove Assistant - Pi Chef Blog #4 - Temperature Camera Overlay



After building a custom camera mount for the Panasonic Grid-Eye sensor, Bernhard Mayer (bernhardmayer) got to work on creating the first video with the temperature overlay enabled. “The next step is to make a video with camera and temperature data to see how the data aligns in the whole sensing area. Making a video with OpenCV is quite simple: you just have to add each image/frame and OpenCV does the rest,” he wrote. “Unfortunately OpenCV and the video input buffer always add a little delay to the video stream. So there is a little delay between the temperature data and the video. One solution would be to handle the video input in a second thread. But this is more complex so I have to live with this little delay for now.”



Project: Automatic Dough Shaper - Pi Chef Blog #5 - Motor Control



Magic smoke is one of those phenomena that every engineer dreads smelling, but it is one of the hard facts of life as an electrical engineer. Unfortunately for AnnaLisa Davis (a_davis_22), her workbench is ripe with the fresh smell of that wispy demon. In the fifth update of project Automatic Dough Shaper, AnnaLisa was working on adding in a stepper motor to her project to serve as the motion element to a cutting device. Things were going ok until she accidentally connected a 12V power lead to the wrong side of her breadboard resulting in a fried development board, and that familiar acrid smell of burning electronics.


“It smelled a little like something was burning, but I couldn't see anything wrong... Then I couldn't get the computer to recognize my PSoC. And after some puzzling I realized that I had accidentally connected the motor's 12v power supply to the same side of the breadboard as the PSoC power to the A4988,” she wrote. “I completely burned up my microcontroller! And probably my A4988 too. sheesh.I guess I learned my lesson. Be extremely careful about where you put the power!



Project: The Cooker Connector - Pi Chef Blog #7 - PCB Design



Everyone knows that I love to see custom PCBs in design challenge projects, and that is exactly what Jonathan Schooler (jschools) seventh update to project The Cooker Connector, is all about. “I will be designing a Printed Circuit Board (PCB) for my Sensor Hub. This is the piece that connects the thermometer probes to the Raspberry Pi. I plan to mount the board on top of the Raspberry Pi, similar to how the official Pi HATs mount,” he wrote. “This provides a strong mechanical connection to the Pi and a direct electrical connection as well. The circuit board will hold all of my electrical components, including the Analog-to-Digital Converter, the jacks for the temperature probes, and all of the circuitry to transform the signals and get them where they need to go. I also plan to plug the servos that control the air intake vents into the board.”



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 apologize for the summary being a little short this week, but I am currently traveling to Atlanta to attend a woodworking event and to hang out with almost one hundred of my fellow maker content creators. 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