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  1. Prikvačeni tweet
    29. lip 2019.

    Finally got a fully working chip wire bonded, took long enough but the result looks stunning

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  2. 2. velj

    Class 100 clean banana

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  3. 14. sij

    New blog post - Notes on DIY photoresist synthesis from accessible materials. Near the end of the post there are also helpful hints on chemical sourcing for amateur scientists, especially if you have access to a commercial shipping address

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  4. 8. sij

    petition to include emojis in chemical symbols > - 😐-

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  5. 8. sij

    chem twitter - mostly unrelated pictures, but apparently sellers on alibaba can be a great chemical source. they are completely lawless with sending hazardous compounds to anyone really

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  6. 5. sij

    Thin films on silicon

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  7. 3. sij

    Vintage Arduino... Found an old serial v2 PCB and decided to populate it. ~700 of these were produced, remember the second image?

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  8. 2. sij

    delayed timebase never gets old

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  9. 26. pro 2019.

    I’ve literally made chips by hand and it’s still amazing how we can derive the required precision from amorphous deserts of sand and machines built from rocks

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  10. 26. pro 2019.

    this is another reason ICs are amazing, they disobey the universe and maintain extreme order and precision on all levels. 1 part in 10K dopant will raise conductivity 1M times, and 1°C change during fab causes a 100mm wafer to grow 1um but somehow they are still nearly perfect

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  11. 26. pro 2019.

    𝘦𝘯𝘵𝘳𝘰𝘱𝘺 - a two part short story

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  12. 25. pro 2019.

    Addition of triarylmethane dye (crystal violet) to solvent solution, looks like a forest growing upside down or something

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  13. 24. pro 2019.

    Precipitation of what I hope is nitro-substituted cinnamaldehyde, with NO2 bubbles coming up after each drop

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  14. 23. pro 2019.

    Yes clearly 2^8 is 256.36, these didn’t have the best log precision

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  15. 23. pro 2019.

    The one on the left is faster?? Shown here calculating 2^8, antilog(log(2) * 8)

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  16. 23. pro 2019.

    Oh no the collection is growing... this one came with the original packaging!

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  17. proslijedio/la je Tweet
    21. pro 2019.

    (thread) What do you get when you charlieplex 12 LEDs with an ATtiny85 on a snowflake-shaped PCB? A holiday ornament from Sara and me! This was a really fun one. It may be a bit too late to make your own, but check out the design and source here:

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  18. 21. pro 2019.

    It also has an active vacuum pump in the CRT (ion / getter pump)... this scope is so good in fact that someone from Princeton University in the 80s thought that it produced superluminal, or faster-than-light radiation... (pic is from manual)

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  19. 21. pro 2019.

    the CRT is likely the most complicated ever produced, with a direct-write bandwidth of 3 to 5GHz!! to get the required deflector sensitivity, tek engineers originally thought the CRT needed to be 7 feet long but used some novel wack electron optics to shorten it.

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  20. 21. pro 2019.

    (thread) just repaired a 7104 for , the fastest analog scope ever made. normally, the trace gets dimmer with increasing sweep speed so they literally added "night vision" (microchannel plate array) to the CRT to make it bright up to 1GHz. (500MHz pictured)

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  21. 6. pro 2019.
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