ReflowMaster
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UnexpectedMaker
Shortage of ATSAMD21G-A?
Currently looks like ATSAMD21G-A are hard to source. How many of the SAM D21 family might be an optional drop-in replacement please? Based on, I guess, why you opted for that chip.
https://au.mouser.com/c/?q=ATSAMD21G seem to have various SAM D21G variants.
Reflow Master only supports the ATSAMD21G18A - in the QFP package.
Anything else will require you to modify the PCB design (if you go for a QFN package of the 21G18A) or require bootloader and code changes to work on a version with less Flash/SRAM.
It's in stock at mouser... though not many. https://au.mouser.com/ProductDetail/Microchip-Technology-Atmel/ATSAMD21G18A-AUT?qs=sGAEpiMZZMtXHE36kCvv36ajhsTJC%252B%2FBgmvnKz0leZ0%3D
You only need 1 right?
Ta, I'll get me 10 but missed that in the search - too literal.
On Sun, Dec 19, 2021 at 5:39 PM Unexpected Maker @.***> wrote:
It's in stock at mouser... though not many.
https://au.mouser.com/ProductDetail/Microchip-Technology-Atmel/ATSAMD21G18A-AUT?qs=sGAEpiMZZMtXHE36kCvv36ajhsTJC%252B%2FBgmvnKz0leZ0%3D
You only need 1 right?
— Reply to this email directly, view it on GitHub https://github.com/UnexpectedMaker/ReflowMaster/issues/20#issuecomment-997341265, or unsubscribe https://github.com/notifications/unsubscribe-auth/AANQYK2IAIAY3OUYCRY3NKLURWALNANCNFSM5KLRMAHA . Triage notifications on the go with GitHub Mobile for iOS https://apps.apple.com/app/apple-store/id1477376905?ct=notification-email&mt=8&pt=524675 or Android https://play.google.com/store/apps/details?id=com.github.android&referrer=utm_campaign%3Dnotification-email%26utm_medium%3Demail%26utm_source%3Dgithub.
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DOH, can't get the K-type MAX31855K, have to wait (apparently)
On Sun, Dec 19, 2021 at 7:06 PM Asterion Daedalus < @.***> wrote:
Ta, I'll get me 10 but missed that in the search - too literal.
On Sun, Dec 19, 2021 at 5:39 PM Unexpected Maker @.***> wrote:
It's in stock at mouser... though not many.
https://au.mouser.com/ProductDetail/Microchip-Technology-Atmel/ATSAMD21G18A-AUT?qs=sGAEpiMZZMtXHE36kCvv36ajhsTJC%252B%2FBgmvnKz0leZ0%3D
You only need 1 right?
— Reply to this email directly, view it on GitHub https://github.com/UnexpectedMaker/ReflowMaster/issues/20#issuecomment-997341265, or unsubscribe https://github.com/notifications/unsubscribe-auth/AANQYK2IAIAY3OUYCRY3NKLURWALNANCNFSM5KLRMAHA . Triage notifications on the go with GitHub Mobile for iOS https://apps.apple.com/app/apple-store/id1477376905?ct=notification-email&mt=8&pt=524675 or Android https://play.google.com/store/apps/details?id=com.github.android&referrer=utm_campaign%3Dnotification-email%26utm_medium%3Demail%26utm_source%3Dgithub.
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ATSAMD21G18A in QFP seems to be hard to find with the main distributers. Given that I only need 1 for this project, and I don't have a programmer to load arduino, I thought to buy this board from aliexpress:
https://www.aliexpress.com/item/1005003445206496.html?spm=a2g0o.productlist.0.0.7a916ee2h9RW5J&algo_pvid=37a7e5d5-9eef-42c4-806d-6dfa0d4050d2&algo_exp_id=37a7e5d5-9eef-42c4-806d-6dfa0d4050d2-5&pdp_ext_f=%7B%22sku_id%22%3A%2212000025820256134%22%7D&pdp_pi=-1%3B254.07%3B-1%3B95.53%40salePrice%3BMXN%3Bsearch-mainSearch
It appears from the fuzzy photo to have the ATSAMD21G18A in QFP package, and I can erasily upload the bootloader using the board. Once done I can desolder the chip off the board and use it for the reflow oven PCB.
What do you think?
Sure, using a doner chip from another board is fine, so long as you have the tools and skills to remove it and re-solder without killing it.
great, ill do that then. I would assume a hot air gun should do the trick.