Piotr Esden-Tempski

Embedded Open-Source Hacker? Founder of @1bitsquared⋅Maintainer https://black-magic.org ⋅ https://icebreaker-fpga.org #hardwarehackers #fpga #asic #embedded #risc-v

Public Key

npub1m7xyz3ms00rzrn43j8dyerndxu35nkzfdu9xmp3vsm97jnx3f5tsa6kmu3

NIP-05 Address

esden@chaos-social.mostr.pub

Profile Code

nprofile1qqsdlrzpgac8h33pe6cerkjv3eknwg6fmpyk7zndsckgdjlffng569cpzemhxue69uhhyetvv9ujumn0wd68ytnzv9hxg0twafc

Publishing to

relay.nostr.band

Author Public Key

npub1m7xyz3ms00rzrn43j8dyerndxu35nkzfdu9xmp3vsm97jnx3f5tsa6kmu3

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Last Notes

2025-06-19 23:28:50

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It is aliiiiive! ;)
https://assets.chaos.social/media_attachments/files/114/712/623/219/036/362/original/4679ed71c02b8ad8.mp4

2025-06-19 22:47:39

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@nprofile…scwy If you are going to @nprofile…e06c teardown this weekend I will be there on Saturday. Say “hi”, and I can show you the new prototype hardware in person. :D

2025-06-19 22:45:06

A bit of a teaser for all of you wonderful people! We always need to keep moving forward. ;) This new hardware will take quite a lot of time and effort to get production ready, due to some drastic changes. Don't hold your breath, if you need a BMP get a BMP. But it will be a very nice step forward. While we are here I have to mention, that it is only possible for me to work on this because of the continuing support of @nprofile…scwy and your purchases of the #blackmagicprobe thank you ❤️
https://assets.chaos.social/media_attachments/files/114/712/451/649/129/753/original/aee9601580bd1d67.jpeg

2025-06-19 04:25:22

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@nprofile…2kgy I am not exactly sure how I ended up with these specific parts. I guess it was a bit of a random pick. But I mounted some MCP2542FDT-E/MF on those boards. For a sec I thought I chose the same part as the once elusive STM32C092RC nucleo boards, but I was wrong, those use MCP2562FDT-H/SN…

2025-06-19 03:50:15

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If I make another revision I should fix the date… it is not 2024 any more :/ Freudian slip i guess 😅

2025-06-19 03:43:23

Made a quick and dirty fdCAN transceiver breakout for nucleo. Now I can finally do some tests and experiments before committing to it on the actual project. :) #electronics #opensource #canbus #embedded
https://assets.chaos.social/media_attachments/files/114/707/962/183/048/791/original/0af99a8b23cf05f0.jpeg

2025-06-14 19:50:55

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The march! So many people! So many hand made signs! This is great to see! Thank you Eugene for being awesome! #nokings
https://assets.chaos.social/media_attachments/files/114/683/455/112/939/417/original/1acacce00a9e7e94.mp4

2025-06-14 19:20:42

Here we go! Eugene Oregon #nokings
https://assets.chaos.social/media_attachments/files/114/683/199/809/866/633/original/856f4f3bc59ce31c.jpeg
https://assets.chaos.social/media_attachments/files/114/683/200/697/598/219/original/e8349cfb3b755c15.jpeg
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2025-06-10 22:41:52

I currently don't have the energy to cross post on Bluesky... it seems most tech folks that interact with my content are on fediverse anyways... and Bluesky seems to become more and more like the old Twitter… :/ (I know I could put effort in customizing it but *ugh*) On some level it was nice when everyone was in the same place... but alas…

2025-06-10 22:19:43

Another round of trying to walk the thin line of being open as a benefit to the user, and not so open that opportunists kill the project by depriving it from funds... I do wish I did not have to be paid for my time so I could just work on stuff that I think will be useful to everyone... and not worry about the economics… *sigh* https://github.com/icebreaker-fpga/icebreaker/issues/57#issuecomment-2960127670

2025-06-10 22:12:17

SQUEEEEEEZE ... I *think* I might be able to use 0402 instead of 0201 for all this, but it needs quite a lot more of puzzling to figure out. I will leave that for the next revision of the board. I do expect there will be some issues with that. I made some major changes that will need time to address.
https://assets.chaos.social/media_attachments/files/114/661/361/832/162/782/original/07d4dab18b63c77f.png

2025-06-10 20:00:35

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@nprofile…jvky I do use that combo on occasion. But I have to have an X11 environment ready when necessary... >_> presenting at conferences for example 😬

2025-06-10 19:57:54

Oof... completely understandable from the KiCad dev perspective. To be fair, there were other more serious reasons I had to switch back to X11 about a year ago due to Wayland "glitches”. I still would love to see Wayland succeed eventually... maybe the distributions making that hard break will force things to improve? :shrug:
https://fosstodon.org/@kicad/114660789432923276

2025-06-02 22:05:21

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@nprofile…zs83 The connections are designed so that you should be able to just snap off the sections by bending them. If you want to be extra careful you can use an exacto knife to cut the copper traces on the connecting tabs before you break of the PCB. Alternatively you could use a fret saw or a depanelling tool like the PD-25-N from Hakko https://www.digikey.com/en/products/detail/american-hakko-products-inc/DP-25-N/9597256

2025-06-01 23:25:48

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@nprofile…7r05 It is more likely a skill issue on my end. You probably found a guide that was more accurate than mine. At the end I hope that my issue will be resolved with the adjustments to my nginx config. That said, I still wish mastodon came with an easier to manage update system. Discourse is actually been painless to keep up to date, I wish Mastodon was as easy as that.

2025-06-01 23:20:13

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@nprofile…z7r0 yeah, that is how they get you. All the subscriptions are “I can handle that" in the singular, but draining the account dry in the aggregate. 🙃💸

2025-06-01 22:45:48

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@nprofile…z7r0 Yeah I was considering that option. But as I am already paying for this colo server I rather not take on extra monthly fees if I can avoid it.

2025-06-01 22:44:48

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To be totally fair, some of the problem was due to the nginx config. There was a tiny note about a change that has to be made in it when using docker. I hope that after changing that setting things will smooth out. Still I wish the setup was better packaged and would work bit better out of the box. Aka mastodon instance for dummies. 🙃

2025-06-01 21:43:24

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@nprofile…6wva I mean... no no no no bad recommendation. >_< See the dedicated post. They are just throwing fuel on the fire of people not wanting to play with fediverse >_< *grumble* (sorry the whole admin weekend resulted in me having a really horrible mood >_<)

2025-06-01 21:41:33

I try to be a good member of the fediverse by hosting my company accounts on my own mastodon instance. I already have a dedicated server. So I put it on there using the official docker instructions. For the second time now, updating this thing ended up in a pile of grief. Files not loading, binaries missing, instructions unclear, nginx config wrong. All kind of horrible stuff. Why can't it be as simple as discourse. Discourse is easy to keep updated >_<

2025-06-01 21:34:22

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@nprofile…6wva yeah, a lot of my stuff is still oldschool bare metal setup. I rarely find the time/motivation to update this stuff, especially when it "just works”... All new services I acquire I try to put into docker containers... but that is also not always as smooth as I wish... looking at you mastodon…

2025-06-01 21:32:10

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For simple setups like mine, I somewhat would expect, that this load bearing software would come with some automatic config file update scripts. They could run after installation and at least attempt to get things back up and running. >_<

2025-06-01 21:29:52

I guess I am one of the few holdouts to still host their own email server. Running Debian on a dedicated machine. I have been swamped with life and work for ages now, but I finally decided to bite the bullet and do a system update. And of course, the whole dovecot config format had to change, breaking half of the email setup. This resulted in two days of anxiety filled, admin work. *sigh* ... I know it is good to improve things in software, still I did not like it one bit! :(

2025-05-17 01:59:45

Updated my STM32 KiCad Symbol generator! It now generates the modern library format and uses alternate pin functions feature. I decided not to include the "all features listed" strings as I did in the past. (I might add them later as a dedicated alternate function.) This results in more compact symbols. Because it is my personal preference I keep the GPIO pin name in every alt-function. Give it a try, let me know what you think. #kicad #stm32 #opensource #mcu https://github.com/esden/stm32-kicad-lib
https://assets.chaos.social/media_attachments/files/114/520/666/530/294/286/original/7ff111606e036f98.png

2025-01-07 21:07:48

Hey everyone! The first Black Magic Debug V2.0.0-rc1 Firmware major stable release candidate is out! This release is quite a massive step forward with a lot of new functionality! Please give this release candidate a try and report any issues you may find! See release notes for details for this release candidate. Thank you everyone who contributed! 🙂 https://github.com/blackmagic-debug/blackmagic/releases/tag/v2.0.0-rc1 Discuss: https://github.com/blackmagic-debug/blackmagic/discussions/2045 #opensource #debugger #electronics #jtag #swd
https://assets.chaos.social/media_attachments/files/113/789/112/498/016/261/original/0e2f3bd28636cc28.jpeg

2024-12-09 16:06:05

Digital modes like FT8 are quite amazing! I am able to receive messages from across the globe! (Also: Setting this up was shockingly easy with the mcHF. All I needed to do was to hook it up over USB and configure the WSJT-X software to use it!) #hamradio #mchf #ft8 #digital
https://assets.chaos.social/media_attachments/files/113/623/719/058/397/341/original/3301a5cefe997c26.jpeg

2024-12-05 18:14:07

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@nprofile…zuq0 Yeah this does fit the category pretty well. Now we have to start collecting cursed packages too, not just cursed footprints. :D

2024-12-05 18:03:08

Look at that quirky balun! LOOK AT IT! They soldered a ferrite onto the back of a blank SMD component! I love it! :D Yes this is an off the shelf product, I did not come up with it! https://www.digikey.com/en/products/detail/pulse-electronics/CX2074NL/2265447 #electronics #hamradio #mchf #rf
https://assets.chaos.social/media_attachments/files/113/601/530/085/012/383/original/71ea94666f778acf.jpeg

2024-12-03 14:53:30

It has been sitting in a box on my shelf for way too long! It is time to finally assemble the mcHF radio! Let’s see how it goes! :) #opensource #hamradio #amateur #qrp #electronics #assembly #kitradio
https://assets.chaos.social/media_attachments/files/113/589/459/782/511/423/original/5100c2ff766f7df7.jpeg

2024-11-14 19:14:23

I got myself a little present.I have not exposed real film in quite a long time. I have never used Olympus cameras, so it will be a trip to the past as well as a new experience. :D Looking forward to resurrecting an old hobby. #photography #gear #vintage
https://assets.chaos.social/media_attachments/files/113/482/901/738/828/634/original/9176a325fcb54475.jpeg

2024-11-14 18:53:22

After many years, lot's of paperwork and a significant amount of fees. I had my Naturalization Ceremony late last week. Now I am part of this “experiment".😅#NewUSCitizen (I know the timing is a little bit 😬, wish us all good luck…)
https://assets.chaos.social/media_attachments/files/113/482/819/119/440/900/original/80d6425f5987246d.jpeg

2024-01-03 00:45:14

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@npub1e2z…ldaf I would not use avr, it is very power hungry. A modern stm32l4 would be a much better choice.

2024-01-03 00:43:20

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@npub1e2z…ldaf I use the JouleScope. It is pricy but very good! I use it quite a lot to do power usage optimization on a battery powered project right now. It served me well on two projects so far. I will likely upgrade to the newer hardware soon. https://www.joulescope.com/products/js220-joulescope-precision-energy-analyzer

2023-09-23 23:41:39

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@npub10ae…nlyc Ohh good to know! I do want to make JTAG and SWD opto isolators eventually and offer them as an option. They do exist from the "usual suspects" but are prohibitively expensive.

2023-09-23 23:41:39

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@npub10ae…nlyc Ohh good to know! I do want to make JTAG and SWD opto isolators eventually and offer them as an option. They do exist from the "usual suspects" but are prohibitively expensive.

2023-09-23 23:35:54

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@npub10ae…nlyc Well done! That is an actually good reason for a wireless BlackMagic. :)