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    Open Source OLED Watch

    Ben Jordan
    |  April 12, 2016

    It's a great time to be an engineer, and a . In keeping with the theme of Petr Tosovsky's Open Source Projects in Altium blog, we found another Open Source Hardware (OSHW) project which was so cool we wanted to share it with the community. In this blog, Ben Jordan interviews 4th year computer engineering student Jared Sanson about his awesome OLED watch, which he designed the electronics for in Altium Designer®.

    Last month, we published a blog by Petr Tosovsky highlighting some of the neat open source hardware projects that have been designed in Altium . Most of these have been done by people who have access to Altium as a full commercial package for their day-to-day work as engineers and PCB designers. But there is a thriving next generation of engineers who are doing some pretty awesome work too. We found one such amazing open source project on the blog pages of a 4th-year engineering student at University of Canterbury in New Zealand, Jared Sanson. I asked Jared some questions and to share some of his thoughts on this neat project.

    watch 3.0.jpg

    [Ben Jordan] An OLED watch is an impressive thing to design and build solo. Why did you start this project?

    [Jared Sanson] I started building this watch project because I had an OLED display lying around, but no way to drive it. After starting to design a breakout PCB in Altium, I realised it was such a waste so I decided to turn it into a smart-watch platform, complete with Bluetooth LE and various sensors.

    [Ben Jordan] You’re currently in your final year of Computer Engineering at University of Canterbury in NZ. Was this project helpful in your work there?

    [Jared Sanson] It’s taken about a year, and I finally have something that can actually tell the time, as well as being able to keep track of my university timetable. This project was a great way to learn the intricacies of Altium Designer, embedded programming, and hardware debugging (there were some pretty tricky hardware bugs in my design!)

    [Ben Jordan] Explain some of your decisions regarding the PCB design and components you chose.

    [Jared Sanson] I decided to use a PIC24F microcontroller for this project, which had plenty of processing power to drive the OLED display. I wanted to have the PCB fit the exact dimensions of the OLED display technology to give myself a good design challenge. This posed some restrictions on the types of components I could use, so I tried to stick to 0603 SMD passives and QFN chips where possible. QFN turned out to be fairly easy to solder, but I didn’t have the equipment to solder BGAs so I made sure to avoid those. I also decided to restrict the design to 2 layers in order to keep costs down. This made routing the PCB very tricky indeed. Getting the last few tracks routed on the PCB took as much time as routing most of the PCB!

    hardware-b_thumb1.jpg

    [Ben Jordan] What were some of the biggest challenges you faced with the board design?

    [Jared Sanson] When I was building this I didn’t have access through the university network to the Altium Content , so I had to create a lot of my own components before I could create the PCB. This taught me a painful lesson when I ordered my first PCB; I forgot to check my footprints against the chips I was using, and the microcontroller footprint turned out to be too small.

    oled_rework_02.jpg

    [Ben Jordan] I know the pain of a dud prototype board on a student’s wallet all too well! Does anything stand out about Altium which helped make this possible for you?

    [Jared Sanson] Altium’s 3D PCB view was extremely helpful when it came to arranging components on the PCB, as it let me see exactly how each component would affect the overall thickness, and how the battery would fit underneath the PCB.  I created most of the components using simple 3D primitives such as the buttons and SMD passives, but I also imported STEP models for some of the more complex components such as the USB connector. This allowed me to see exactly how the USB connector would fit onto the PCB.

    pcb3d-top.png

    [Ben Jordan] Well it sure turned out looking sweet. So, what are the next steps for this project?

    [Jared Sanson] In the future I plan on revising the schematic to lower power consumption, fit a thinner profile, and fix all the issues I’ve found. I may crowd-fund the project as a kitset [Ed. – I will definitely want one!] once I have that all worked out if people are interested!

    [Ben Jordan] Why make this an Open Source Hardware (OSHW) project?

    [Jared Sanson] I am a big fan of open-source hardware, so I have released my PCB and firmware under an OSHW license for other people to learn from and use in their own projects. If you want to know more about my project, check my posts here:

     http://jared.geek.nz/2014/jul/oshw-oled-watch 

    [Ben Jordan] Thanks for sharing this cool project with us! Be sure to follow the link to see more about Jared’s OSHW OLED watch.

    pcb3d-bottom.png

    What other cool OSHW / stuff is out there in the community? Feel free to comment and let us know if you’re working on a neat project like this.

    About Author

    About Author

    Ben is a Computer Systems and PCB Engineer with over 20 years of experience in embedded systems, FPGA, and PCB design. He is an avid tinkerer and is passionate about the creation of electronic devices of all kinds. Ben holds a Bachelor of Engineering (CompSysEng) with First Class Honors from the University of Southern Queensland and is currently Director of Community Tools and Content.

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