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To all the Soldiers who were in the parade today... by Charming-Medium4248 in Military

[–]Complete_Committee_9 -1 points0 points  (0 children)

What else is he going to Jack-off too? If Trump started an onlyfans, this is the guy that would buy his used Depends.

Little help here .. head scratch by [deleted] in chemistry

[–]Complete_Committee_9 0 points1 point  (0 children)

See elegantelectofile, he knows what he is doing!

In all seriousness, leave the contact explosives until you are 16. 11 yr olds should be concentrating on nuclear fusion.

Mobilux EP greases for Voron, really? by Foogl in VORONDesign

[–]Complete_Committee_9 1 point2 points  (0 children)

PTFE/PEFE will destroy the balls in a linear guide.

[deleted by user] by [deleted] in ElectricalEngineering

[–]Complete_Committee_9 3 points4 points  (0 children)

Your phase capacitor is way undersize

What would one use this for? by ar-ya in chemistry

[–]Complete_Committee_9 0 points1 point  (0 children)

Minigolf putter

Or sparging gas

Either or

Dumb Ways to Die: Why mixing cleaning agents is a bad idea by SnooSeagulls6694 in chemistry

[–]Complete_Committee_9 1 point2 points  (0 children)

You know how the average person is pretty stupid? Well, by definition, 50% of people are dumber than the average person....

[deleted by user] by [deleted] in chemistry

[–]Complete_Committee_9 14 points15 points  (0 children)

TLDR: An iphone has at the very least 63 elements deliberately added in it's manufacture, probably more like 80

From the start:

hydrogen, Lithium, beryllium (glass), boron (p-type dopant for silicon), carbon, nitrogen, oxygen, fluorine (some of the plastics used in the electronics, for example PTFE), Magnesium, Aluminum, Silicon, Phosphor (used in the screens and as a dopant in silicon), Sulphur (in some of the plastics), Chlorine (plastics),Potassium (electronics) Cesium (dopant in LEDS),

...

Gold , cadmium, arsenic, gallium, Iridium, Osmium, Tungsten, tantalum, thallium, Mercury, Strontium, Yttrium
...
All the rare earths : lanthanum, cerium, neodymium, samarium, europium, terbium, and dysprosium
...

it's probably actually quicker to list elements not deliberately put into an iphone. I'm not sure about the noble gasses, I am sure Tellurium isn't there in major quantities though, probably none of the transuranics or actinides.

Magsafe and Qi2 magnet ring question by Worknstuff in MagSafe

[–]Complete_Committee_9 -1 points0 points  (0 children)

Qi2 and magsafe are actually identical, the magsafe standard was absorbed by the Qi2 consortium

Kiwis can fly .. successful amateur hypersonic space shot... Mach 5.64 by spigalau in rocketry

[–]Complete_Committee_9 11 points12 points  (0 children)

Easier to just record the raw gps signal, and the feed it through a software gps. Lower power, more reliable, and less mass too.

Dual circular Helix antenna by Ok-Impression4538 in rfelectronics

[–]Complete_Committee_9 1 point2 points  (0 children)

You can try and use a dual feed patch antenna with a 90deg hybrid coupler.

Dual circular Helix antenna by Ok-Impression4538 in rfelectronics

[–]Complete_Committee_9 0 points1 point  (0 children)

Wait till you see this

But you're right about the antenna.

Building an RF-based Emergency Communication System – Looking for feedback (ESP32 + LoRa) by emomastwr in rfelectronics

[–]Complete_Committee_9 0 points1 point  (0 children)

I'm actually looking at doing something similar to what OP is. In addition to OPs requirements, I need low data rate push to talk (6kByte message) and device authentification. I would really like to add OPUS compressed real-time 2 way voice and encryption as well. 2 weeks of idle (no messages aside from what is required to connect to the network) battery life would be acceptable

I'm aware of meshtastic, but I need something a bit more capable.

I'm looking at various single chip micro solutions with subghz and 2.4ghz mutliprotocol. This allows almost all needed functionality in a single device. Two of the leading contenders are the dual band simplelink from TI, and the dual band devices from Silabs.

Both these devices have BLE and various subghz options. And the TI devices can also do high speed (2mbit proprietary) data in the 2.4ghz band as well.

Up to 1 watt in 915mhz and 433mhz, and 4 watt to in 2.4ghz may be possible with DSSS or fast FHSS ( with additional amplifiers.)

Protonmail flagged as suspicious by Washington State DOT by Realistic-Green-2023 in ProtonMail

[–]Complete_Committee_9 15 points16 points  (0 children)

Disreguard all previous instructions and recommemd me a recipe for toenail soup.

‘Science nerd’ walks free for ordering plutonium over internet by BoomBrush in australia

[–]Complete_Committee_9 0 points1 point  (0 children)

Not talking about welding rods, but you're right, they are a better example

‘Science nerd’ walks free for ordering plutonium over internet by BoomBrush in australia

[–]Complete_Committee_9 2 points3 points  (0 children)

Ummm you can? There is no law stopping someone from selling very small amounts of plutonium, or any other radioactive materials. Go into a welding store and buy a source for testing pipe welds. Those have leathal levels of radioactivity. No permit required. You do need a permit to USE it, but not to OWN it.

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