brad

@brad@posiwid.net

electrical engineer, synth designer, ham radio operator. alt of @kr4dio@mastodon.radio
websitehttps://posiwid.net
pronounshe/him
brad boosted

[?]Ingomar DL9ET » 🌐
@dl9et@radiosocial.de

[?]✧✦Catherine✦✧ » 🌐
@whitequark@social.treehouse.systems

trick question [SENSITIVE CONTENT]

quiz: what do you think this chip's manufacturer and part number is?

photo of a chip marked "MXL MXL86110I"

Alt...photo of a chip marked "MXL MXL86110I"

...

[?]✧✦Catherine✦✧ » 🌐
@whitequark@social.treehouse.systems

all of you are wrong. the chip is Motorcomm YT8531

>>> hex(await mdio_iface.c22_read(0, 2))
'0x4f51'
>>> hex(await mdio_iface.c22_read(0, 3))
'0xe91b'

as for how come the chip is Motorcomm YT8531? well, JLC PCBA has a few questions to answer now...

...

[?]ftg » 🌐
@ftg@mastodon.radio

@whitequark
Someone sold them Motorcomm's marked as Max Linear?
Very naughty.
And I think this is the first verified instance of this happening that I have seen personally.
I wonder how many others have been missed in the past...

    ...

    [?]✧✦Catherine✦✧ » 🌐
    @whitequark@social.treehouse.systems

    @ftg it's remarked quite skillfully too, I am not able to tell with one of the two devices (both counterfeit), the other I can tell but only because I already know it

      ...

      [?]ftg » 🌐
      @ftg@mastodon.radio

      I wonder if the die + bond wire + leadframe is close enough that even simple x-ray inspection would have missed it.
      Assuming anyone would bother to do one.

      ...

      [?]✧✦Catherine✦✧ » 🌐
      @whitequark@social.treehouse.systems

      @ftg so the problem with this is... MXL uses a specific DCDC circuitry that this Motorcomm device does not work with. I'm not sure why yet but I had to feed it external 1V1 for it to be able to train its PLL even

        ...

        [?]ftg » 🌐
        @ftg@mastodon.radio

        @whitequark
        Interesting. So in some setups it would work in a drop-in, pin compatible manner?
        Kainda bad choice for counterfeiting then.

          [?]Shawn KG5RHR » 🌐
          @kg5rhr@mastodon.radio

          This is one of the things that frustrates me about in my neighborhood: I'm in a shallow valley and the nearest repeaters are over the ridges. I can hear them, but they can't hear me. Y'know, like regular ham radio. And I have an antenna on the roof of my 2nd floor apartment, no less. I have to go downtown to chat.

          Screenshot of the meshcore app where I'm transmitting, yet nobody hears me. But I can hear them.
"How goes the propagation today"
"nobody hears me, that's how"

          Alt...Screenshot of the meshcore app where I'm transmitting, yet nobody hears me. But I can hear them. "How goes the propagation today" "nobody hears me, that's how"

            ...

            [?]Giovanni - ZL2GX » 🌐
            @gmoretti@mastodon.social

            @kg5rhr Any hope of putting better antenna - e.g. a Yagi pointing in the direction of a repeater? You've effectively increased your transmit power in one direction.

            This might get you started: hackaday.com/2025/12/31/bringi or having your own repeater on the roof & a companion node in the apartment which only has to get as far as your roof.

            This thought has stuck while I was typing and it'd be easy to try: using two oven trays as a corner reflector: youtube.com/watch?v=jRKbklgdInc :-)

              [?]Voyager Meshcore DD » 🌐
              @voyagermesh@dresden.network

              @kg5rhr
              Yeah, feel you, we've all been there.

              Then again, it's the chance for pioneer work.

              Making a little local noise, finding others, or even just register your repeater on the map so others have a goal to reach this one, and THEN at some point being connected -- that's a great feeling. Promise!

              We don't have that opportunity very often in our saturated world.

                1 ★ 0 ↺

                [?]brad [he/him] » 🌐
                @brad@posiwid.net

                @kg5rhr@mastodon.radio Are you on the discord? There are a bunch of people working to get meshcore repeaters up around town. Also, there's a meetup tomorrow evening (Wed Jan 28) at Austin Beerworks Sprinkler Valley.

                  ...

                  [?]Shawn KG5RHR » 🌐
                  @kg5rhr@mastodon.radio

                  @brad Thanks. I'm familiar with the austinmesh group, but I haven't joined the Discord because that's yet another app. I should join the mailing list or something.

                    [?]ftg » 🌐
                    @ftg@mastodon.radio

                    Hmm, I wonder why I modularized this scrap video capture (?) card.
                    I guess somebody had already pulled the main chip from it.

                    But I don't recall what I used the voltage regulator modules for.
                    Which is a shame.
                    But I did come across this image in my archives.

                    ...

                    [?]ftg » 🌐
                    @ftg@mastodon.radio

                    Here's a close up of the resulting modules.

                    [?]Dave Rahardja » 🌐
                    @drahardja@sfba.social

                    Interesting: this startup has demonstrated the use of electricity to extract carbon and water from the air to make gasoline at a rate of one gallon per day. The amount of electric energy used is roughly double the energy contained in the gasoline in the end, so it’s nowhere near as good as directly powering an EV, but still, it’s interesting that carbon capture can be done for gasoline cars, which could allow ICE vehicles to become carbon-neutral faster than converting every vehicle to an EV.

                    jalopnik.com/2083556/new-york-

                    ...

                    [?]Bill Plein🌶 » 🌐
                    @bplein@bvp.me

                    @drahardja It’s not carbon capture if you are burning carbon to do this.

                    I think the use case is for preppers at their compound.

                      ...

                      [?]Dave Rahardja » 🌐
                      @drahardja@sfba.social

                      @bplein The article addresses this.

                        ...

                        [?]Bill Plein🌶 » 🌐
                        @bplein@bvp.me

                        @drahardja Yes, I read before I replied 😀

                        What I meant is the use capture really is hiding the net carbon burning. Someone else is burning more carbon than you are putting away. It might be better termed “local carbon capture”.

                        Interesting science but again I think the proper use case is for someone who is so far away from sources of liquid fuel or the doomsday prepper. If you excess wind and solar that could be sold to the grid, maybe?

                          ...

                          [?]Dave Rahardja » 🌐
                          @drahardja@sfba.social

                          @bplein If your power comes from burning fossil fuels then sure, this is a net loss. But if you use renewables then this can be a net gain or at least neutral.

                            ...

                            [?]Bill Plein🌶 » 🌐
                            @bplein@bvp.me

                            @drahardja It can theoretically approach zero. On a whiteboard. 🙂

                              brad boosted

                              [?]Onno (VK6FLAB) » 🌐
                              @vk6flab@mastodon.radio

                              ...

                              [?]Christopher M0YNG [He / They] » 🌐
                              @M0YNG@mastodon.radio

                              @vk6flab rootkid does amazing stuff. This one is great, I think I like everything about it!

                                ...

                                [?]N3VEM » 🌐
                                @N3VEM@mastodon.radio

                                @M0YNG @vk6flab someone posted this in my clubs slack - I think it would make an awesome project for hanging on a wall in the shack, although I'd want to make it way less bright than he did😀

                                  0 ★ 0 ↺

                                  [?]brad [he/him] » 🌐
                                  @brad@posiwid.net

                                  Turkey vulture basking in the morning sun

                                  Photo of a turkey vulture with its wings spread wide

                                  Alt...Photo of a turkey vulture with its wings spread wide

                                  Photo of a turkey vulture with its wings slightly spread

                                  Alt...Photo of a turkey vulture with its wings slightly spread

                                  brad boosted

                                  [?]George Takei :verified: 🏳️‍🌈🖖🏽 » 🌐
                                  @georgetakei@universeodon.com

                                  A reminder that if the government can send migrants to a prison camp without any due process, it can send U.S. citizens there, too. I know because this happened to me and my family in 1942.

                                  1 ★ 0 ↺
                                  in reply to »

                                  [?]brad [he/him] » 🌐
                                  @brad@posiwid.net

                                  @bplein@bvp.me if you ever want a hand or a second set of eyes on a kicad design, I'd be happy to help

                                    1 ★ 1 ↺
                                    Ed W8EMV :radio_tower: boosted
                                    in reply to »

                                    [?]brad [he/him] » 🌐
                                    @brad@posiwid.net

                                    @w8emv@mastodon.radio Depending on terrain, a handful of fixed infrastructure nodes can be really helpful in making the mesh usable until it can reach critical mass. It's been cool watching our Austin mesh develop from a dozen people messaging "ack?" to fairly robust coverage through most of the city over the past year.

                                      ...
                                      0 ★ 0 ↺

                                      [?]brad [he/him] » 🌐
                                      @brad@posiwid.net

                                      One of the first signs of spring: my Texas Redbuds are budding

                                      small pink-red flower buds on thin branches

                                      Alt...small pink-red flower buds on thin branches

                                      closeup photo of red-pink flower buds

                                      Alt...closeup photo of red-pink flower buds

                                      0 ★ 0 ↺

                                      [?]brad [he/him] » 🌐
                                      @brad@posiwid.net

                                      A dust storm from West Texas blew through this afternoon, turning everything sepia

                                      Landscape photo with rolling hills and hazy dirt colored sky

                                      Alt...Landscape photo with rolling hills and hazy dirt colored sky

                                      1 ★ 0 ↺

                                      [?]brad [he/him] » 🌐
                                      @brad@posiwid.net

                                      I spent all day re-arranging stuff in my office to make space for my new plotter -- this thing is a beast!

                                      Photo of a big red IBM power toggle switch

                                      Alt...Photo of a big red IBM power toggle switch

                                      Photo of the IBM badge on a 7375 pen plotter

                                      Alt...Photo of the IBM badge on a 7375 pen plotter

                                      Photo of the control panel of a 7375 pen plotter with several numbered buttons and a joystick

                                      Alt...Photo of the control panel of a 7375 pen plotter with several numbered buttons and a joystick

                                        4 ★ 3 ↺
                                        in reply to »

                                        [?]brad [he/him] » 🌐
                                        @brad@posiwid.net

                                        Are you familiar with the Citizen Weather Observer Program? http://www.wxqa.com/

                                        There are thousands of independent weather stations publishing their conditions over APRS, some via radio and some via the internet. You can grab the raw stream of data from any APRS server, or see it visualized on a site like https://aprs.fi

                                        CC: @xan@xantronix.social

                                          ...
                                          2 ★ 0 ↺
                                          in reply to »

                                          [?]brad [he/him] » 🌐
                                          @brad@posiwid.net

                                          I use miniflux (self-hosted): https://miniflux.app/

                                            2 ★ 0 ↺
                                            in reply to »

                                            [?]brad [he/him] » 🌐
                                            @brad@posiwid.net

                                            @KC8JC@mastodon.radio I recently switched from nvim to helix, and I'm enjoying it.

                                              ...
                                              0 ★ 0 ↺
                                              in reply to »

                                              [?]brad [he/him] » 🌐
                                              @brad@posiwid.net

                                              In that case, I hope you get a chance to see them. Vai and Danny Carey are great "young" additions, and Adrian is still a rock star :)

                                                0 ★ 0 ↺
                                                in reply to »

                                                [?]brad [he/him] » 🌐
                                                @brad@posiwid.net

                                                @Ricardus@mastodon.sdf.org I saw BEAT in Austin a couple of months ago and thought it was great at the time. But after more reflection, I felt like it wasn't much more than a nostalgia experience. I really preferred the 2017 tour incarnation of KC with Fripp and the three drummers across the front of the stage.

                                                  ...
                                                  0 ★ 0 ↺
                                                  in reply to »

                                                  [?]brad [he/him] » 🌐
                                                  @brad@posiwid.net

                                                  @molly0xfff@hachyderm.io This may just be my own personal journey, but I feel like the early-mid aughts were a special time with blogs, blog-rings, RSS, and aggregators. I remember building a proto-social-media site where local blogs were aggregated into a forum for discussion. A friend and I did a weekly podcast about underground rock bands in Shanghai. Pre smartphone photo blogs were amazing. Non-commercial sites like shanghaiist (gothamist franchise) and metafilter could survive on adword revenue. Google search still worked.

                                                  My memory of the "personal web" at that time is that it felt like it was a linear progression from BBSes, gopher, Usenet, and IRC. More graphical and more widely accessible, but with a lot of the same community spirit.

                                                    ...
                                                    0 ★ 0 ↺

                                                    [?]brad [he/him] » 🌐
                                                    @brad@posiwid.net

                                                    I just realized my good ol' days ended about the time smartphones became ubiquitous. I wonder if that has anything to do with it. How much of that old feeling could be recaptured just by using a desktop computer to "go online?"

                                                    CC: @molly0xfff@hachyderm.io

                                                      0 ★ 0 ↺

                                                      [?]brad [he/him] » 🌐
                                                      @brad@posiwid.net

                                                      Travis County decided my house is worth about 4x market value, so I get to spend several hours this morning waiting for them to show up for my "scheduled" protest hearing.

                                                      Photo of the Travis County Central Appraisal District building with blue sky in the background

                                                      Alt...Photo of the Travis County Central Appraisal District building with blue sky in the background

                                                      0 ★ 0 ↺

                                                      [?]brad [he/him] » 🌐
                                                      @brad@posiwid.net

                                                      The neighbors' falling-down shack finally fell all the way down. The kids and I were doing crafts when we heard a loud crash outside. The building was about 10ft from our property line. Before pic is from last summer.

                                                      Small house missing a couple of walls, leaning precariously

                                                      Alt...Small house missing a couple of walls, leaning precariously

                                                      Pile of construction debris

                                                      Alt...Pile of construction debris

                                                      0 ★ 0 ↺

                                                      [?]brad [he/him] » 🌐
                                                      @brad@posiwid.net

                                                      Back home in Austin, and our sage bush correctly predicted this morning's rain

                                                      Texas sage bush with pink-purple flowers in front of a blue sky with wispy white clouds

                                                      Alt...Texas sage bush with pink-purple flowers in front of a blue sky with wispy white clouds

                                                      2 ★ 0 ↺
                                                      in reply to »

                                                      [?]brad [he/him] » 🌐
                                                      @brad@posiwid.net

                                                      yt-dlp can also download subtitles, including automatically generated closed-captioning.
                                                      Formatting and screen captures would take some manual work, though.

                                                      CC: @Mnemonic@hackers.town

                                                        0 ★ 0 ↺
                                                        in reply to »

                                                        [?]brad [he/him] » 🌐
                                                        @brad@posiwid.net

                                                        Weekend project! Arduino based eprom programmer: https://github.com/walhi/arduino_eprom27_programmer

                                                          1 ★ 0 ↺

                                                          [?]brad [he/him] » 🌐
                                                          @brad@posiwid.net

                                                          While playing with my kids at Jinjiang Action Park (锦江乐园) earlier this week, I had a sudden rush of memories from my first time there in 2002-03. At the time, I still carried a paper pocket dictionary everywhere, but my Chinese had gotten good enough that I was able to make friends with people who didn't speak English. A couple of my "local" friends, S and X, wanted to check out this huge new ferris wheel that had just opened up. We walked around the outer wall of the park until we found a some construction debris we could use to climb over, then just hopped the wall. I don't remember what the ferris wheel cost, but it seemed expensive at the time, so S talked an attendant into letting us ride for free. They say the wheel is going to be torn down later this year.

                                                          photo of an amusement park with merry go round and ferris wheel

                                                          Alt...photo of an amusement park with merry go round and ferris wheel

                                                          0 ★ 0 ↺

                                                          [?]brad [he/him] » 🌐
                                                          @brad@posiwid.net

                                                          Bluetooth audio has been broken on my Ubuntu Macbook since the upgrade to 24.04, but I finally got around to seriously looking for a solution today. After quite a few useless stackoverflow comments, I found the answer. Turns out it was as simple as blacklisting the snd_soc_avs module: https://bugs.launchpad.net/ubuntu/+source/pipewire/+bug/2063150

                                                          0 ★ 0 ↺
                                                          in reply to »

                                                          [?]brad [he/him] » 🌐
                                                          @brad@posiwid.net

                                                          @w8emv@mastodon.radio Sounds interesting. Do you happen to have a link to the PDF?

                                                            0 ★ 0 ↺
                                                            in reply to »

                                                            [?]brad [he/him] » 🌐
                                                            @brad@posiwid.net

                                                            If you've had ducks before you likely know better than I do, but I had better flow and fewer clogging issues with my garden fish pond drain when I switched to a dome-shaped bottom drain (think inverted salad bowl 1/2-inch above floor)

                                                              ...
                                                              0 ★ 0 ↺

                                                              [?]brad [he/him] » 🌐
                                                              @brad@posiwid.net

                                                              It's apparently a real word, but my brain independently invented the term eco-brutalist when I saw the 1000 Trees building looming over Suzhou Creek this afternoon

                                                              Photo of a large building with towering concrete planters beside a river

                                                              Alt...Photo of a large building with towering concrete planters beside a river

                                                              Photo of a large building with towering concrete planters

                                                              Alt...Photo of a large building with towering concrete planters

                                                              Photo of a large building with towering concrete planters

                                                              Alt...Photo of a large building with towering concrete planters

                                                              Photo of a large building with towering concrete planters covered in scaffolding beside another highrise

                                                              Alt...Photo of a large building with towering concrete planters covered in scaffolding beside another highrise

                                                              0 ★ 0 ↺

                                                              [?]brad [he/him] » 🌐
                                                              @brad@posiwid.net

                                                              I feel fortunate to have had the chance to see a collection of Roman Verostko works in person at MUD Gallery in Shanghai. He was a great pioneer of generative and plotter art.

                                                              Artwork by Roman Verostko, colorful lines, thick black line

                                                              Alt...Artwork by Roman Verostko, colorful lines, thick black line

                                                              Artwork by Roman Verostko, colorful lines, thick black line

                                                              Alt...Artwork by Roman Verostko, colorful lines, thick black line

                                                              0 ★ 0 ↺
                                                              in reply to »

                                                              [?]brad [he/him] » 🌐
                                                              @brad@posiwid.net

                                                              Uspol [SENSITIVE CONTENT]@requiem@hackers.town I'm not an infosec expert, but I don't see how the US government can monitor or limit what software people run on their own computers, as the first paragraph of the article implies.

                                                              The article goes on to say that Kaspersky is banned from providing software to US users, which I guess is possible to enforce to a certain extent.

                                                              I'm in Shanghai right now, seamlessly using a VPN to access blocked content (including the linked article), so I'm a little skeptical.

                                                                ...
                                                                1 ★ 0 ↺
                                                                in reply to »

                                                                [?]brad [he/him] » 🌐
                                                                @brad@posiwid.net

                                                                @ripper@chaos.social If you have a lot of PCBs to change, it's possible to use a regex in your language of choice to modify the file directly

                                                                  1 ★ 0 ↺
                                                                  in reply to »

                                                                  [?]brad [he/him] » 🌐
                                                                  @brad@posiwid.net

                                                                  @ripper@chaos.social select all, edit menu, edit text and graphics properties

                                                                    ...
                                                                    0 ★ 0 ↺

                                                                    [?]brad [he/him] » 🌐
                                                                    @brad@posiwid.net

                                                                    I took a little walk around Fengjing Ancient Town (枫泾古镇) on the outskirts of Shanghai this morning

                                                                    old Chinese buildings along a canal

                                                                    Alt...old Chinese buildings along a canal

                                                                    0 ★ 0 ↺
                                                                    in reply to »

                                                                    [?]brad [he/him] » 🌐
                                                                    @brad@posiwid.net

                                                                    @tony@mastodon.radio @W1CDN@mastodon.radio Seconding this. I spent a lot of time tweaking controller settings in RetroArch to make my 8bitdo Pro controller usable for N64 games, and I'm still not really happy with it.

                                                                      0 ★ 0 ↺

                                                                      [?]brad [he/him] » 🌐
                                                                      @brad@posiwid.net

                                                                      The park by the National Palace Museum is pretty nice

                                                                      zig-zag bridge over a pond with koi

                                                                      Alt...zig-zag bridge over a pond with koi

                                                                      zig-zag bridge over a pond with koi

                                                                      Alt...zig-zag bridge over a pond with koi

                                                                      view of park with pond and pavilion

                                                                      Alt...view of park with pond and pavilion

                                                                      tropical trees with lots of air roots

                                                                      Alt...tropical trees with lots of air roots

                                                                      0 ★ 0 ↺

                                                                      [?]brad [he/him] » 🌐
                                                                      @brad@posiwid.net

                                                                      Sunny morning in Taipei

                                                                      View over the rooftops of Taipei with Taipei 101 skyscraper and mountains in the background

                                                                      Alt...View over the rooftops of Taipei with Taipei 101 skyscraper and mountains in the background

                                                                      View over the rooftops of Taipei

                                                                      Alt...View over the rooftops of Taipei

                                                                      0 ★ 0 ↺

                                                                      [?]brad [he/him] » 🌐
                                                                      @brad@posiwid.net

                                                                      We're on our way to Shanghai (via Seattle and Taipei)

                                                                      Airplane at gate with jetway attached and Delta baggage trolley

                                                                      Alt...Airplane at gate with jetway attached and Delta baggage trolley

                                                                      brad boosted

                                                                      [?]Paris Marx » 🌐
                                                                      @parismarx@mastodon.online

                                                                      Farmers in Bastrop, TX were hopeful when Elon Musk bought land nearby, but now he’s turning the area into “an environmentally hazardous industrial park.” Authorities won’t do anything because they’re understaffed and “intimidated by their powerful new neighbor.”

                                                                      texasmonthly.com/news-politics

                                                                        ...
                                                                        Older...
                                                                        1 ★ 0 ↺
                                                                        in reply to »

                                                                        [?]brad [he/him] » 🌐
                                                                        @brad@posiwid.net

                                                                        @paulrickards@mastodon.social I didn't have a modem for my VIC20 or C64 when I was a kid, but I happen to have one of those VICmodem cartridge near the top of my retro computing project pile. I was thinking about sticking an esp32 serial-wifi thing in the case.

                                                                        VICModem cartridge, Hamtext VIC-20 cartridge, and serial port cartridge for HP85 on top of a TRS-80 pen plotter

                                                                        Alt...VICModem cartridge, Hamtext VIC-20 cartridge, and serial port cartridge for HP85 on top of a TRS-80 pen plotter

                                                                          1 ★ 0 ↺
                                                                          in reply to »

                                                                          [?]brad [he/him] » 🌐
                                                                          @brad@posiwid.net

                                                                          @dylanbeaudette@mastodon.radio I use RG400 for no particular reason other than (I think) it looks fancy

                                                                            ...
                                                                            1 ★ 0 ↺

                                                                            [?]brad [he/him] » 🌐
                                                                            @brad@posiwid.net

                                                                            @brad@posiwid.net @dylanbeaudette@mastodon.radio I try to always have a BNC adapter or jumper handy

                                                                            RG400 coax jumper cable coiled with male RF connector and female BNC

                                                                            Alt...RG400 coax jumper cable coiled with male RF connector and female BNC

                                                                              ...
                                                                              0 ★ 0 ↺

                                                                              [?]brad [he/him] » 🌐
                                                                              @brad@posiwid.net

                                                                              There's been a lot of talk about enshittification lately, and this Baffler article is a really good look at the history of SaaS: https://thebaffler.com/latest/spreadsheet-assassins-king

                                                                              0 ★ 0 ↺

                                                                              [?]brad [he/him] » 🌐
                                                                              @brad@posiwid.net

                                                                              The boys and I hiked down to the bottom of our hill this afternoon

                                                                              Two boys facing away from the camera, climbing up a rocky hill with sparse vegetation under a blue sky

                                                                              Alt...Two boys facing away from the camera, climbing up a rocky hill with sparse vegetation under a blue sky

                                                                              Two boys facing away from the camera, walking down a rocky hill with sparse vegetation under a blue sky

                                                                              Alt...Two boys facing away from the camera, walking down a rocky hill with sparse vegetation under a blue sky

                                                                              History