brad
@brad@posiwid.net
quiz: what do you think this chip's manufacturer and part number is?
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...
@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...
@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
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.
@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
@whitequark
Interesting. So in some setups it would work in a drop-in, pin compatible manner?
Kainda bad choice for counterfeiting then.
This is one of the things that frustrates me about #Meshcore 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. #AustinMesh
@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: https://hackaday.com/2025/12/31/bringing-a-yagi-antenna-to-915mhz-lora/ 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: https://www.youtube.com/watch?v=jRKbklgdInc :-)
@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.
@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.
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.
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.
https://www.jalopnik.com/2083556/new-york-startup-builds-machine-that-makes-gasoline-from-air/
@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.
@bplein The article addresses this.
@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?
@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.
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.
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
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.
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.
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.”
https://www.texasmonthly.com/news-politics/elon-musk-vs-organic-farmers-bastrop/