My first job out of college was at Teradyne, a company that makes PCB and semiconductor testers. Had a nostalgia jag and looked up pictures of the bonkers PCBs that went into their equipment. (I was writing test automation software: with hindsight I wish I had worked with the HW folks, I would have learned a lot!)
#pcbs #retrocomputing
Can anyone recommend a UK based PCB manufacturer for simple home/hobby PCBs? Only looking for small run of some test boards #electronics #pcbs
Before I try to reinvent the wheel, is there already an established framework for smallish stackable #PCBs?
I want to be able to stack a bunch of boards, as close to 100*100mm as I can get, without going over.
The Raspberry Pi HAT template might work, but it's a bit small and I'm not sure I actually want to use a Raspberry Pi.
Well, it looks like I'm just about ready to order #PCBs, if I can get my ENS160 to give me half-reasonable CO2 estimates.
Dayton Daily News investigation found #contamination, sick workers at #PiketonOhio plant
By Lynn Hulsey
May 15, 2019
"A polluted former #UraniumEnrichment plant in #Piketon closed years ago but it's impact continues to resonate through the community, including this week when a #MiddleSchool was closed after traces of radioactive #neptunium were found at an air monitoring station at the school.
"Contamination with radiation and multiple toxic substances at the former Portsmouth Gaseous Diffusion Plant led to an ongoing, multibillion dollar environmental cleanup and sickened plant workers who had to fight for compensation as they battled debilitating terminal illnesses related to their years at the plant.
"A massive 2006 investigation by the Dayton Daily News found five plumes of poisoned #groundwater, contamination with radiation, #beryllium, polychlorinated biphenyls (#PCBs) and #asbestos.
"The investigation found lax safety practices, routine mishandling of toxic and #radioactive material and at least 400 accidental releases of #UraniumGas or toxic fluorine. Toxins were dumped into unlined #landfills and ditches and leached into #groundwater and the Little #BeaverCreek, a tributary of the #SciotoRiver.
"The plant was operated by the federal government and contractors from 1954 to 2001 and enriched uranium to high levels for #NuclearWeapons and #NuclearSubmarines and to lower levels for #nuclearpowerplants.
Supercon 2023: Jesse T. Gonzalez Makes Circuit Boards That Breathe and Bend - Most robots are built out of solid materials like metal and plastic, giving them r... - https://hackaday.com/2024/07/24/supercon-2023-jesse-t-gonzalez-makes-circuit-boards-that-breathe-and-bend/ #2023hackadaysupercon #printedcircuitboards #hackadaycolumns #robots #valves #robot #cons #pcbs
#LandBack at #Barnhart:
Contextualizing the Re-occupation of #BarnhartIsland in Shared Legacies of Struggle
From #TurtleIsland to #Palestine, the struggle at #Akwesasne is rooted in the shared struggle of all #OppressedPeoples of the world who are opposing the illogic of #SettlerCapitalism and the endless violation of the #lands and #waters that our current economic system necessitates.
By Jennifer Lee
June 25, 2024
"On May 21, 2024, a group of eight Kanien’kehá:ka (#Mohawk) community members from Akwesasne were arrested at Niionenhiasekowa:ne (Barnhart Island). Certain individuals among the '#Akwesasne8' had originally gone to Barnhart to exercise their right to build a hunting and gathering shelter on their own territory, in part to protest an ongoing land claim settlement that threatens to hand over Kanien’kehá:ka title to this island, among other traditionally held territories, to New York State. The settlement is being negotiated between New York entities and three Akwesasne government councils.
"Presently, the settlement negotiations would require the extinguishment of Mohawk title to Barnhart Island, which would be effectuated through an act of Congress. By asserting their right to the land, the #Akwesasne8 have sent a clear message to both negotiating parties. Barnhart Island, like all other territories illegally stolen and swindled from their community, is not for sale—particularly not by collaborationist band and tribal council entities that purport to represent the full community but that were in fact historically imposed upon it at gunpoint.
"The fact that a group of eight community members was surrounded within just a few hours by approximately 35 police agents (including both border patrol agents and state troopers) is a clear indication of the strategic significance of this island to the interests of settler-capital. As Taiewennahawi (Marina Johnson-Zafiris), one of the eight arrestees, explains in her article 'Akwesasne and the History of #Hydropower,' the Moses-Saunders #hydrodam, located at the east end of Barnhart Island, is one of the many dams along the St. Lawrence Seaway that has supplied 'cheap' electricity to an unending procession of heavily #polluting factories since the 1950s.
"For decades, dirty plants like #Alcoa, #GeneralMotors, and #ReynoldsMetals harnessed the immense power of the #Kaniatarowanenneh (#SaintLawrenceRiver) at the Moses-Saunders dam to manufacture aluminum, a cheap, abundant, and malleable building material that requires vast amounts of power to extract and process. Not only was hydropower-fueled aluminum production critical to New York’s economic development, it was central to the national pride and independence of so-called #Québec. Eager to assert its autonomy from Anglophone capital in the 1960s, the province began damming rivers on #Indigenous land in a frenzy of hydropower nationalism.
"Upstream on the St. Lawrence, the aluminum plants at Akwesasne used a #toxic #sludge containing polychlorinated biphenyls (#PCBs) as a hydraulic fluid during the production process. These PCBs were manufactured by the infamously litigious #corporation #Monsanto, which continues to evade public #accountability for discharging this known #carcinogen into the St. Lawrence River and onto Kanien’kehá:ka soil. The #carcinogenic soup was left exposed on the very grounds where the children of Akwesasne played and where families grew their vegetables. Today, Akwesasne sits downstream and downwind of three heavily #polluted #superfund sites, and residents of Akwesasne report that almost everyone they know has a friend or family member suffering from a rare #cancer, #MetabolicSyndrome, or #autoimmune disorder. Rare, life-threatening illnesses exist at Akwesasne at rates that the public would never consider normal or acceptable in any non-Indigenous community.
"Dana-Leigh Thompson, one of the Akwesasne 8, lived about 3,000 feet from the PCB #dumpsite of the #GeneralMotors (#GM) factory for a decade. She calls what is happening to the community nothing short of an '#environmental #genocide.'"
Read more:
https://magazine.scienceforthepeople.org/online/land-back-at-barnhart/#easy-footnote-15-16285
I was super excited for these counterfeit USB-C Pi Picos, but it seems like they fucked up or omitted the voltage-regulation resistors so they only work with a USB-A to USB-C cable.
https://gts.corvid.ca/@steven/statuses/01HZJ0BFC4Q6JJ3TVQTXFW6R6Y
So I think I'm going to try to get rid of the two upper buttons on this one.
The boot button, I can just map to select. It's just a regular GPIO when it's not booting.
For the reset button... I don't think I actually need one? I might be able to get away with just cutting the power.
https://gts.corvid.ca/@steven/statuses/01HW7AWW68TW3NK5R021FV8W0J
#Monsanto 's vision of the future - in 1957 #Disneyland! 
A dream collaboration between 2 wonderfully evil #corporations, working hand in hand on the future we now live in:
"Is everything of plastic? - Almost!"
https://www.youtube.com/watch?v=uUOTVPVQZNo
#Microplastics everywhere, #pcbs (#foreverchemicals) - even in schools 
- A courtesy of... Monsanto!
https://foodscience.news/2023-12-27-monsanto-ordered-pay-7-people-exposed-chemicals.html
Remember the media storm about tanker noise and potential tanker leaks affecting west coast Orcas, but not a single story (except maybe Tyee) about how the west coast orcas are “walking dead” already from PCB pollution that nobody is doing anything about.
The hysterical focus on the very unlikely (proximate) while wistfully ignoring the actual (ultimate) culprits: PCBs & overfishing, then forestry & climate.
“former students and parent volunteers claimed that exposure to Monsanto's polychlorinated biphenyls, or #PCBs, from fluorescent light fixtures caused a host of health problems, including brain damage and autoimmune disorders. PCBs, which were banned from production in 1979 due to their toxicity, were commonly used in caulking, light fixtures and other parts of buildings from the 1950s to 1970s, according to Massachusetts' Bureau of Climate and Environmental Health.”
https://www.cbsnews.com/news/monsanto-verdict-pcb-857-million-washington-school/
#pnw
Among #orcas stranded in the UK, levels of #PCBs, a group of highly dangerous and persistent chemicals that do not degrade easily, were 30 times the concentration at which the animals would begin to suffer health impacts, researchers said.
Scientists described the findings as a “huge wake-up call”. #Biomagnification #FoodChain #pollution
Levels of toxic PCB chemicals found at 30 times ‘safe’ limits in stranded whales | #Cetaceans | The Guardian
https://www.theguardian.com/environment/2023/nov/28/levels-of-toxic-pcb-chemicals-found-at-30-times-safe-limits-in-stranded-whales
Okay, I have the stupidest problem.
I can't find a SMD USB port (micro-B or USB C), that's available for assembly on #JLCPCB that I can find a footprint for.
The part numbers aren't on Component Search Engine, I can't figure out how to download the footprints from JLCPCB, and if they're clones of better known parts I have no idea how to match them.
Every other component is easy. USB ports are somehow the only thing I can't figure out.
Help?
So the #hackerCamp season is over and the cold dark evenings, so perfect for laying out code and #PCBs are upon us.
So what #powerSource are you using for your badges?
LiPO seems a little bit much, and shipping is awful, coin cell seems both so weak and wasteful. AAA batteries are chunky.
#BadgeLife
Day 237 of #PCBs (Part 3) - Assembly and testing edition.
Mechanical fit looks good.
This is what all the PCBs with the exception of the main board look like when assembled:
Day 237 of #PCBs (Part 2) - Assembly and testing edition.
The boards for the sequencer are here!
From top to bottom:
- Front panel
- LED spacer
- LED boards (left and right)
- Stiffener board
- Main board
Time to check for mechanical clearances, and to start to bring up the main board.
