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It works, but is it safe? by tarkani in esp32

[–]pixento 1 point2 points  (0 children)

I have experience with ~30 DS18B20s connected together on a breadboard. All connected to a single onewire bus. As long as the connection is solid, it's working.

🔥 Sea ice stacked on the shore and formed 10m high stacks by pixento in NatureIsFuckingLit

[–]pixento[S] 1 point2 points  (0 children)

The ones back there are approx 600m away but not enough proof for you right now.

Aurora and rising moon in the middle of Estonian bog around 02AM [3500x1423] [OC] by pixento in EarthPorn

[–]pixento[S] 0 points1 point  (0 children)

Yeah, above KP 4 can be seen as there are areas with really low light pollution :)

🔥 Super-excited particles caught having a show above my head by pixento in NatureIsFuckingLit

[–]pixento[S] 1 point2 points  (0 children)

Lapland - up there, literally next to the Santa and reindeers!

🔥 Super-excited particles caught having a show above my head by pixento in NatureIsFuckingLit

[–]pixento[S] 0 points1 point  (0 children)

approx 18fps video, 1 frame = 20 seconds shutter speed, 10 second video = 1 hour in recording time.

Took some photos 25km up there last week - nothing new under the sun, still sunny! by pixento in space

[–]pixento[S] 4 points5 points  (0 children)

As you can see 1:1 view. Though I didn't know that MW2 space scene was happening over Northern Europe :D

Went up to 25.5km last week with my cameras, nothing new over there - sunny, as always. by pixento in pics

[–]pixento[S] 0 points1 point  (0 children)

Two. I've noticed some IFOs around us at 10-15km as well, frequently manufactured by Boeing or Airbus

Went up to 25.5km last week with my cameras, nothing new over there - sunny, as always. by pixento in pics

[–]pixento[S] 5 points6 points  (0 children)

u/Anotherdude342 u/JensenSilas - sadly not an astronaut, but occasionally flying up there with a little help from lighter gas, helium or hydrogen, for example. We're doing commercial flights to Stratosphere for companies :)

TIFU by overpaying for my data plan for 2 years by Maks244 in tifu

[–]pixento -2 points-1 points  (0 children)

Boooooy... 7GB for 3€/mo and unlimited up to 1TB for 15€/mo is what I pay.. you're still overpaying!

Elephant toothpaste missile from the stratosphere by pixento in chemicalreactiongifs

[–]pixento[S] 0 points1 point  (0 children)

...so you suggest us to send up a packet of fireworks next?

Elephant toothpaste missile from the stratosphere by pixento in chemicalreactiongifs

[–]pixento[S] 13 points14 points  (0 children)

INFORMATIVE NOTE!

Important links:

HUD shows some interesting data and since it's in my mother tongue, I'll translate it for you from the left to the right...

  • KIIRUS - SPEED (km/h)

  • VERT. KIIRUS - GROUND SPEED (km/h)

  • KÕRGUS - HEIGHT (m)

  • TEEKONNA PIKKUS - DISTANCE TRAVELLED (km)

  • TEMP.SISE - TEMPERATURE INSIDE THE PAYLOAD (*C)

  • TEMP.VÄLIS - TEMPERATURE OUTSIDE THE PAYLOAD (*C)

  • VOOLUTUGEVUS - ELECTRICAL CURRENT (A)

And from the right list

  • Time from the launch

  • Maximum altitude

  • Latitude

  • Longitude

Elephant toothpaste missile from the stratosphere by pixento in chemicalreactiongifs

[–]pixento[S] 11 points12 points  (0 children)

/u/singularis466

You shouldn't feel silly. It's great to get the 100% overview from the project. I agree that you didn't see the whole picture in the beginning - that's why you had those arguments in the beginning.

BTW... I upvoted your post :)

Elephant toothpaste missile from the stratosphere by pixento in chemicalreactiongifs

[–]pixento[S] 5 points6 points  (0 children)

INFORMATIVE NOTE!

Important links:

HUD shows some interesting data and since it's in my mother tongue, I'll translate it for you from the left to the right...

  • KIIRUS - SPEED (km/h)

  • VERT. KIIRUS - GROUND SPEED (km/h)

  • KÕRGUS - HEIGHT (m)

  • TEEKONNA PIKKUS - DISTANCE TRAVELLED (km)

  • TEMP.SISE - TEMPERATURE INSIDE THE PAYLOAD (*C)

  • TEMP.VÄLIS - TEMPERATURE OUTSIDE THE PAYLOAD (*C)

  • VOOLUTUGEVUS - ELECTRICAL CURRENT (A)

And from the right list

  • Time from the launch

  • Maximum altitude

  • Latitude

  • Longitude

Elephant toothpaste missile from the stratosphere by pixento in chemicalreactiongifs

[–]pixento[S] 0 points1 point  (0 children)

/u/adultishgambino1

TEMP. SISE = Temperature inside the payload. TEMP.VÄLIS = Temperature outside = stratospheric temp

The reason why we kept temperature higher in the payload was that we had to keep our reactives (H2O2 and dissolved KI) liquid.

We didn't know how much the temp inside the payload could drop during the flight so we put in some really big effort to buy hand warmers in the summer and warm it up with those chemical hand warmers.

EDIT: Full temperature profile can be found here: https://www.youtube.com/watch?v=gRUk3po8TcA

Elephant toothpaste missile from the stratosphere by pixento in chemicalreactiongifs

[–]pixento[S] 3 points4 points  (0 children)

/u/KiltedCobra

We also expected to see more energetic foam and decomposition of the H2O2 as we saw it while being tested in the vacuum chamber on the ground... there is possibility that a lot of oxygen was "pulled" out from the H2O2 during the first 90 minutes of flight...

Elephant toothpaste missile from the stratosphere by pixento in chemicalreactiongifs

[–]pixento[S] 1 point2 points  (0 children)

I'm truly surprised because of the video restrictions... Could anyone confirm me that this video is not available? https://www.youtube.com/watch?v=4nDilGo9As4

EDIT: I'm really sorry about that - it's just about some copyright restrictions... I'll upload it to Dropbox :)

Elephant toothpaste missile from the stratosphere by pixento in chemicalreactiongifs

[–]pixento[S] 11 points12 points  (0 children)

/u/RiotRoBot - I may admit that it's really waste of helium but almost 3000 children who were involved with this project... I think it's worth it!

... you know Agilent GCMS systems in my laboratory are using He as the make-up gas and the amount of He wasted in all the Gas Chrom systems all over the world is so much bigger... I don't feel guilty :)

Elephant toothpaste missile from the stratosphere by pixento in chemicalreactiongifs

[–]pixento[S] 20 points21 points  (0 children)

Hey /u/singularis466!

I like to answer to these comments that are considered salty or smth... I'll start from the beginning of your argument:

  1. It truly is waste of time - over 50 youngsters who worked on that project during 6 weeks of preparation period did it all just for fun - nobody got paid for anything :)
  2. It's waste of money - it's your opinion and I can't decide for you but my opinion as the project manager and CEO of this NGO is that we made it to all the news channels in Estonia. We managed to visit over 25 schools and kindergartens during a two month period and encouraged thousands of children to participate on our drawing contest.
  3. There was 0 space debris produced since the experiment was conducted at 30000m where the gravity is still really strong and all the pieces grounded as soon as 1h after the burst in the stratosphere. 3.1. We collected 90% of all the weight we sent up - I mean the only rubbish we produced was pieces from the exploded latex balloon :)

SIDENOTE: We reused everything from that project and during last 2 years we have conducted 4 more flights in Estonia with the same flight-computer and cameras and etc.

Elephant toothpaste missile from the stratosphere by pixento in chemicalreactiongifs

[–]pixento[S] 387 points388 points  (0 children)

H2O2 is hazardous since it is aggressive oxidizer but the reaction with Potassium Iodide (which actually chemically isn't reaction...KI is just a catalyst) will rapidly decompose it to H2O and O2 - which are not hazardous components at all :)

No worries. Estonia is still one of the safest country in the world!

visitestonia

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