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Zach Fredin

@zachfredin

electronics! machines! fab labs! teaching! flexures! birds! https://zachfred.in https://hackaday.io/zakqwy

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14.11.2024
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Latest posts by Zach Fredin @zachfredin

this seems like a perfect blizzard activity

24.02.2026 13:10 ๐Ÿ‘ 1 ๐Ÿ” 0 ๐Ÿ’ฌ 0 ๐Ÿ“Œ 0

a flush is meant to signal an end. A passage. A discarding of remnants left useless to the body and the being from whence they came.

and yet.

and yet it is a beginning.

a flush marks the first steps of a journey towards renewal.

i say flush not to forget.

rather flush to forge ahead, anew.

21.02.2026 04:59 ๐Ÿ‘ 337 ๐Ÿ” 54 ๐Ÿ’ฌ 11 ๐Ÿ“Œ 9
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Icebreaker!!!

15.02.2026 16:53 ๐Ÿ‘ 2 ๐Ÿ” 0 ๐Ÿ’ฌ 0 ๐Ÿ“Œ 0
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An exciting machine is now commissioned! ๐Ÿ˜ฌ๐Ÿ˜ฌ๐Ÿ˜ฌ

10.02.2026 17:29 ๐Ÿ‘ 2 ๐Ÿ” 0 ๐Ÿ’ฌ 0 ๐Ÿ“Œ 0

the birds are so round and poofed today!

07.02.2026 17:08 ๐Ÿ‘ 1 ๐Ÿ” 0 ๐Ÿ’ฌ 1 ๐Ÿ“Œ 0

Oooh plz share your experiences. I've been thinking about setting up some mesh(tastic/core) things at some point.

06.02.2026 23:06 ๐Ÿ‘ 1 ๐Ÿ” 0 ๐Ÿ’ฌ 1 ๐Ÿ“Œ 0
junco on beam

junco on beam

purple bird sticker on hard hat

purple bird sticker on hard hat

work bird updates

30.01.2026 23:45 ๐Ÿ‘ 1 ๐Ÿ” 0 ๐Ÿ’ฌ 0 ๐Ÿ“Œ 0

your code will run backwards!!!!!

23.01.2026 11:09 ๐Ÿ‘ 1 ๐Ÿ” 0 ๐Ÿ’ฌ 0 ๐Ÿ“Œ 0

MORE SHIFT REGISTERS

MOOOOORE

04.01.2026 01:51 ๐Ÿ‘ 2 ๐Ÿ” 0 ๐Ÿ’ฌ 0 ๐Ÿ“Œ 0
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Found an old project in a box and it still works! The wires got a bit crumpled but all sixteen LEDs still glow.

04.01.2026 01:05 ๐Ÿ‘ 11 ๐Ÿ” 0 ๐Ÿ’ฌ 3 ๐Ÿ“Œ 0
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important 3d prints today

19.12.2025 22:24 ๐Ÿ‘ 9 ๐Ÿ” 1 ๐Ÿ’ฌ 1 ๐Ÿ“Œ 0

I used Fusion360 for design work; generally, I make the finished thing, then make a plaster block and Boolean subtract the thing, then make a silicone block and Boolean subtract the plaster, then make a PLA block and Boolean subtract the silicone, then export and print.

10.12.2025 20:52 ๐Ÿ‘ 1 ๐Ÿ” 0 ๐Ÿ’ฌ 0 ๐Ÿ“Œ 0
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Sure! I 3D printed a primary mold for each half, then cast silicone (Mold Star 30) into that, vibratory de bubbled, then cast 50:50 pottery plaster and hydrocal into the silicone. The tiles have a 5 degree draft, but soft tooling means this isn't critical.

10.12.2025 20:50 ๐Ÿ‘ 1 ๐Ÿ” 0 ๐Ÿ’ฌ 1 ๐Ÿ“Œ 0
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It's similar to slip casting but uses a closed 2-part mold with vents, so excess material zoops out and you get good thickness control. I mix the material to a trowel-able consistency, somewhat peanut butter like. Or perhaps a good buttercream frosting.

09.12.2025 15:22 ๐Ÿ‘ 1 ๐Ÿ” 0 ๐Ÿ’ฌ 1 ๐Ÿ“Œ 0
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this weekend was a Sludge Tile Production Weekend

08.12.2025 14:11 ๐Ÿ‘ 5 ๐Ÿ” 0 ๐Ÿ’ฌ 1 ๐Ÿ“Œ 0

should have clarified this post is specifically here to troll @todbot.com

20.11.2025 20:11 ๐Ÿ‘ 1 ๐Ÿ” 0 ๐Ÿ’ฌ 1 ๐Ÿ“Œ 0
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new work mac feat. diverse LED chemistries for various green indicators (shout-out zachfred.in/projects/bli... for avoiding clashes!)

20.11.2025 20:00 ๐Ÿ‘ 0 ๐Ÿ” 0 ๐Ÿ’ฌ 1 ๐Ÿ“Œ 0

I know! It is quite interesting. We figured out that the sludge alone is too, so it's not something that appears as a result of our process. Was a real surprise.

13.11.2025 11:30 ๐Ÿ‘ 2 ๐Ÿ” 0 ๐Ÿ’ฌ 1 ๐Ÿ“Œ 0
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08.11.2025 03:36 ๐Ÿ‘ 2 ๐Ÿ” 0 ๐Ÿ’ฌ 0 ๐Ÿ“Œ 0
move slow and fix stuff poster

move slow and fix stuff poster

if you're feeling generous a donation of 10$ or more to OSHWA will get you one of these beautiful Move Slow and Fix Stuff riso printed posters designed by @leeborg.bsky.social ! Donate here:

secure.lglforms.com/form_engine/...

31.10.2025 16:16 ๐Ÿ‘ 25 ๐Ÿ” 11 ๐Ÿ’ฌ 0 ๐Ÿ“Œ 0

Oh! Sorry I will contextualize more. Merlin, in addition to being a stubby bird of prey, is also a wonderful app by the Cornell Lab of Ornithology ("Merlin Bird ID") that helps one ID birds by description, image, or recorded sound. It is a brilliant and free educational tool, highly recommended!

14.10.2025 10:41 ๐Ÿ‘ 1 ๐Ÿ” 0 ๐Ÿ’ฌ 0 ๐Ÿ“Œ 0

Merlin doesn't yet have giant yellow glowing bird statues in its database!!! Ugh

13.10.2025 18:59 ๐Ÿ‘ 0 ๐Ÿ” 0 ๐Ÿ’ฌ 1 ๐Ÿ“Œ 0
merlin fails to identify a giant glowing yellow bird

merlin fails to identify a giant glowing yellow bird

:_(

13.10.2025 06:39 ๐Ÿ‘ 2 ๐Ÿ” 0 ๐Ÿ’ฌ 2 ๐Ÿ“Œ 0
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A friend snuck into the workshop ๐Ÿฅน

03.10.2025 11:29 ๐Ÿ‘ 1 ๐Ÿ” 0 ๐Ÿ’ฌ 0 ๐Ÿ“Œ 0

yes! Mostly aluminum in the case of this machine. And clay slop, at generally 50:50 by weight. It's been quite a rabbit hole.

24.09.2025 10:53 ๐Ÿ‘ 1 ๐Ÿ” 0 ๐Ÿ’ฌ 0 ๐Ÿ“Œ 0
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waterjet sludge composite experiments continue, basement-kiln-edition!!

23.09.2025 16:27 ๐Ÿ‘ 2 ๐Ÿ” 0 ๐Ÿ’ฌ 1 ๐Ÿ“Œ 0

Maybe typical aspect ratio?? I dunno. Seems pretty chonky. Lots of berries.

11.09.2025 22:49 ๐Ÿ‘ 0 ๐Ÿ” 0 ๐Ÿ’ฌ 0 ๐Ÿ“Œ 0
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Low aspect ratio groundhog eating kousa dogwood berries

11.09.2025 22:48 ๐Ÿ‘ 0 ๐Ÿ” 0 ๐Ÿ’ฌ 1 ๐Ÿ“Œ 0
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thermal hummingbirdo

02.09.2025 23:19 ๐Ÿ‘ 8 ๐Ÿ” 0 ๐Ÿ’ฌ 0 ๐Ÿ“Œ 0

oooooooooh flexure printers ๐Ÿฅฐ I knew I should have gone to fab25!

12.08.2025 11:02 ๐Ÿ‘ 0 ๐Ÿ” 0 ๐Ÿ’ฌ 0 ๐Ÿ“Œ 0