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Pi Chef Design Challenge

12 Posts authored by: dougw Top Member
This is the last day of the design challenge, so time to reflect on the project. Going into the project I had 3 hardware objectives two software objectives and I also wanted to get a new member participating in design challenges. All of these objectives were accomplished with varying degrees of adherence to the original vision for the system. The big accomplishment of working out a successful collaboration was very satisfying. There was so much potential for disaster  and there were any ...
This project is about spices and we have 25 jars to fill with our favorite spices. Here are my picks from Martha Stewart's Spice Rack: It is going to take time and money to acquire a full set, but we now have a place to store them.   Spice Notes Ground allspice This ground dried berry of a Caribbean evergreen tree has a scent and taste similar to clove, cinnamon, and nutmeg. It was first brought to Europe by Christopher Columbus, who mistakenly thought it was a pepper; this is why allspice ...
The past week has been a marathon of measuring, designing, 3D printing and electronic assembly. It just seems to take a lot of effort to make custom projects look nice and clean, but if it is going in a kitchen, it really needs to be pretty clean. This video shows assembly of all this work - it is very rewarding when everything fits well.         Here the Spice of Pi packaging is assembled and I'm testing its ability to find and dictate recipes.   Here are a few more r ...
I still have more mechanical packaging to do, but I want to start transitioning over to electronics and software since there are only a few weeks left to complete the project. I have been setting up the Raspberry Pi to use Google Assistant so the system can access the internet using hands-free voice commands. This is my first exposure to this technology and I am pretty excited to try it out. it works amazingly well, but in many ways still has severe limitations. I still cannot believe how well ...
I have finally assembled the complete mechanical system. Both the carousel rotation mechanism and the jar lifter mechanism have been mounted on the bamboo base plate. The video below shows the first operation of the complete mechanism.   Hopefully the PCB I designed at the beginning of the project will arrive soon so I can get the electronics build completed. And then it is on to the software....   Design Challenge Links: Pi Chef Design Challenge About the challenge The other challe ...
I have been struggling to get the main platter printed successfully. I've had 3 prints on the machine for more than 2 days each and it still isn't where I want it. However I just realized the design challenge is almost over and I have a huge amount of work to do. In this update I will put together the main drive assembly. In the next segment I will mount the platter assembly and the lifter assembly on the base plate to complete the mechanical assembly of the machine. Then I will have to scr ...
It has been a heavy week of mechanical design and fabrication. The machine is not together yet, but I wanted to post a blog showing progress:   There are still a couple of pieces to design and print, but I have enough to start assembling the machine. Once I figure out how to ream the jar holes on the main platter a bit to make the fit of some of the jars just a little freer, I can work on assembling the rotation mechanism.   Design Challenge Links: Pi Chef Design Challenge About the ...
This week the Spice of Pi project has seen incremental steps in both the right direction an the wrong direction along with a lot of spinning of wheels both figuratively and literally. Last week I got the jar lifting servo mechanism built and this week I worked on getting the platter rotation mechanism working. The first few days were spent trying to assemble and tune a low-cost 3-D printer that was large enough to print the platter. It is together and printing but I'm still not happy with the p ...
This episode deals with design of the spice jar platter and an introduction to the drive mechanism. It will also include some notes on servo motor signals. The circular platter holds 24 spice jars in cylindrical cavities so that when a jar is pushed up from below, it slides up its cylinder without toppling over. It can accommodate an extra jar in the center. The platter is about 30 cm in diameter, which is so big I have to assemble a larger 3-D printer just to build it. (Which is why it isn't ...
This our the first blog in the Pi Chef Design Challenge. The “our” is because glennvanderveer and I will be collaborating on this project. This year I want to try using collaboration as a way to get new members more involved in participating. We don't know how this will play out, but right now Glenn is keen and I am keen to see if we can make it work. Glenn is a new member, but has lots of technical experience especially in software, so technically it should be a good fit. I think fo ...
Spice of Pi Hardware Block Diagram Preliminary BoM Part Number Description image Raspberry Pi 3 SoC: Broadcom BCM2837 CPU: 1.2 GHZ quad-core ARM Cortex A53 GPU: Broadcom VideoCore IV @ 400 MHz. Memory: 1 GB LPDDR2-900 SDRAM. USB ports: 4. Network: 10/100 MBPS Ethernet, 802.11n Wireless LAN, Bluetooth 4.0 Raspberry Pi 7" Touchscreen 7” Touchscreen Colour Display Screen Dimensions: 194mm x 110mm x 20mm (including standoffs) Viewable screen size: 155mm x 86mm Screen Resolution 80 ...
This week the Spice of Pi has been all about designing hardware and ordering enough components to get it working. I had ordered a Google AIY Voice Hat to implement Google Assistant and voice recognition. It has arrived, but it uses a cardboard box for packaging, so I want to design packaging that is a little more appropriate for use in a kitchen. The Pi 3 and touch screen are going in a bamboo chassis - I thought it was appropriate for a kitchen: Next up is the speaker - I spent some time d ...