~~Nope, bottom right and top middle >:D~~
Oh my god I've forgotten what a base is. This transistor is doing my head in.
WaterWaiver
joined 2 years ago
I only know what wikipedia tells me about these things, I've never played with one. I also have no clue yet what it does in this circuit.
3 emitters and 2 collectors.
You can do all sorts of nifty things when you're designing silicon. Including this abomination.
https://en.wikipedia.org/wiki/Carcinisation
Source: datasheet for LM161, a high speed (20ns delay) moderately high voltage (30V) comparator. I'm going to try and make a discrete version of some bits of it and see how well it works. Maybe not this triple-emitter NPN though, I draw the line at components that require livestock sacrifices.
Guardian's "No water for Nuclear" article, was removed, now links to article claiming nuclear will contaminate water systems.
The headline and text of this article were amended on 24 March 2025 after the Guardian was notified of a significant calculation error in the Queensland Conservation Council research. An earlier version said the dams that supply the proposed Callide and Tarong nuclear plants “could not access enough water” to cool them in the event of a meltdown; our article has been amended in line with the organisation’s revised analysis.
Source: bottom of amended article.
That's a CH340G, it has an in-built 3.3V regulator. But there is no external regulator on the board.
Maybe the chip is running off its internal 3.3V, but the board designers put a tie-up resistor on one of its pins to 5V, which results in the weird 3.9V. Dunno. Try attaching a 1K resistor between that pin a GND, see if that makes the problem disappear.
There are some youtube videos of people machining them (sadly my browser does not support smell). Looks like you treat it like any other solid material: hobb or mill the teeth. This is much more expensive than 3d printing.
You might be surprised by your 3d printed gears. If you keep the detail size large they work really well, but backlash is definitely an issue.
FR2 is the brownish material that many cheap circuit boards are made of. It's a mixture of phenolic resin and paper. Apparently it's quite useful to make gears out of:
Phenolic Gears exhibits superior shear force, help reduce machinery noise, absorbs destructive vibration unlike metal gears, phenolic is non-conductive, protects the mating metal gear train, and are known to outlast metal gears under severe continuous service. (source: https://www.knowbirs.com/phenolic-gears )
Has anyone seen these used anywhere? I've read a hint regarding pool equipment, but I have never seen them there. I assume the fibres allow them to last longer than plastic/resin only gears.
I swear that I read that white lead oxide is water soluble, thus happily sticks to your fingers and then gets on your food. I must be misremembering.
Maybe it was something about the solid lead object turning into an (oxide) powder that can then be easily ported as tiny particles on greasy hands? Hearsay science and safety information from me today :)
Welcome to security news theatre :(
I don't think espressif would bother suing, these kind of misshapen claims get constantly made against popular projects all of the time. It's just unusual to see so much coverage about this particular one.
Not so say that externally attackable vulnerabilities in an ESP32 don't exist, they might. Bluetooth devices have an awful track record. But making them up doesn't help the world.
20
Two different sizes shown. Each has two inductors (grey bits) stuck to a capacitor (middle) with some metal end caps acting as terminals. There is a third terminal underneath the capacitor. Grid in background is 1mm, pics stolen from LCSC.
I think this taped picture is also really cool (stolen from here):
Datasheet: https://www.murata.com/en-global/products/productdata/8796766699550/ENFE0002.pdf
About a handspan wide, more than half a meter deep (can't see all the way in at any angle), deep under my house.
The thickness of the board beneath it gives deceptive scale. It's about 50mm tall and the toroid is 85mm in diameter.
https://www.lcsc.com/datasheet/lcsc_datasheet_2408061709_Ruishen-RSCM11548-5mH-3P_C37634003.pdf
I was looking for much smaller CMCs. Also the datasheet for this part doesn't have impedance-versus-frequency graphs so I refuse to buy it anyway :P
Location: Sydney, Australia. Found it during bushcare.
The brass barb fitting and the powdery filling suggest some sort of kiln burner to me, but the dark green paint on the outside of the tube looks rather ordinary and not like it has been through high temperatures.
The soft, powdery cemetitious filling has a copper-green tint. Only one end has a hole.
If it were not for the brass barb and coppery fill colour I would assume this is just a bit of structural steel from someone's carport (or similar) that has filled with cement and now been cut to pieces for disposal. But a carport with a barb fitting? WTH?
We find all sorts of garbage in this bushland because it's sandwiched in suburbia. Traditionally it was a dumping ground (mattresses, furniture, asbestos, whole cars) and today still people use it illegally as a dump (mainly building materials and soil). Lots of random materials get deposited by or uncovered by stormwater runoff & floods too. There is no limit to the craziness of what you find here.
Watching this now live on SBS. It's very confusing.
I cannot tell when actual footage is being used (AI colourised + cleaned up) or when it is re-enactments that have been re-colourised similarly to match. The program actively seems to not want me to be able to tell the difference.
It can't possibly be all based on period footage. There is too much in too high of quality and resolution.
Most (but not all of it) has had its framerate increased to be smooth, so I can't use that as a hint.
Sometimes the soldiers wave at the camera and the footage is a bit lower in quality. Other times they ignore the camera and look more like actors, but I can't be certain.
Some of the equipment looks wrong period (gasmasks) but I can't be sure. I really want to know now (I guess that means its a successful program in some ways). EDIT: Looks like the gasmask is legit!
Never thought watching a program on the SBS would unsettle me as much as this. I've seen AI colourised and interpolated footage, but not mixed with (what I think is) re-enactments in a way designed to stop you telling the differences.
EDIT: It's hard to find info about this show, it has a generic name and looks like it was only released this year.
- Watchable online in Aus right now: https://www.sbs.com.au/ondemand/watch/2374216259693
- Main site (language switch at top-right): https://www.cccprod.com/en/production/apocalypse-d-day
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I suspect that you need to think of the 3 B->E voltages as inputs (OR'd with each other) and the C->lowestvoltageE path as the output. All of them are operating in linear mode too, I think one of them is a low-gain follower whilst others have a lot more gain. Maybe.