One day earlier than expected, our tinyK20 boards arrived, and they are looking great :-):
Four tinyK20 Boards
It always is a moment of fear when I debug a new board like this, as there is always the risk that something went wrong. But all the due diligence and peer reviews paid off so far: debugging the first board worked like a charm:
Programming the first tinyK20
We produced four boards as a ‘unit’, and the boards will be then broken out the frame:
Top side of the board:
Top Side of tinyK20
Bottom side of the board(s):
tinyK20 bottom side
On the board there are footprints for optional micro-SD card, 32kHz clock and DC-DC converter.
On option is to place the 32kHz clock source on the top side. Additionally a larger C can be populated if an extra DC-DC converter is added on the back.
Option: 32kHz Clock and larger C
On the bottom side there is the option to add a 3.3V DC-DC converter to provide enough power if the SD card is more power hungry than the K20 can provide with the internal 3.3V converter:
Bottom side with optional sd card socket and dc-dc converter
SD Card Mounted
We will work on the initial set of documentation for the students so they can sucessfully use the boards in their next projects.
Happy tinying 🙂
MCU on Eclipse 
Well done! It’s always satisfying to have a new computer come to life for the first time.
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Do TinyK20 could be the next Arduino like wave ? I don’t know but for me it’s like “Shut up and take my money !” I’ll take all haha :D. With the SD card it could be interesting to test NuttX RTOS.
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There is definitely a trend for small/tiny/breadboard friendly boards like this. There are several ones on the market e.g. for Atmel boards, but apart of the Teensy which is not usable in my view because you cannot debug it, there is nothign for Freescale devices.
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You guys should make a project page on Hackaday.io, I didn’t even know of your project until today! As Erich Styger said, I think there is demand for this sort of board in the hobbyist market for people who want real debugging capabilities on a devboard which can is also small, and cheap enough to be used in projects. Not to mention it can be used as a debugger itself
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Good suggestion about Hackaday.io :-). I have published it with the initial details here: https://hackaday.io/project/8525-tinyk20-small-uc-board-and-debugger
Thanks!
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Erich, Is the assembled TinyK20 available for purchase?
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Hi Bob,
yes, we sell them to students, and we should have a few available. You can contact me under the email address noted on https://mcuoneclipse.com/about/.
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hi Erich,
I’ve seen your work and it’s amazing, thanks for sharing your knowledge with others, and the entire world. Sir, i only have one simple question, where did you make your boards? and where were soldered?
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We have a laser carver/cutter which we use usually to make the first boards (see https://mcuoneclipse.com/2015/06/17/tinyk20-new-board-with-micro-sd-card/) and to test it.
Then usually we produce a few PCBs externally which we then populate with pars in-house. Once everything is working fine, we produce and populate the boards externally (e.g. with PCBPool).
I hope this helps,
Erich
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Thanks, sir 🙂
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Hi Erich. Is there documentation (pdfs, gerbers, schematics, etc) avalaible for the tinyK20 pcb manufacturing.
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Hi Juan,
yes: https://github.com/ErichStyger/mcuoneclipse/tree/master/tinyK20/Board
Erich
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