nilclass

joined 2 years ago
[–] nilclass@discuss.tchncs.de 2 points 2 months ago

Also the roll that's unspooled is actually smaller

[–] nilclass@discuss.tchncs.de 9 points 2 months ago* (last edited 2 months ago) (2 children)

You must be right!

I'm so glad that we live in a world where the only thing that can't be photoshopped is a blue check mark /s

[–] nilclass@discuss.tchncs.de 106 points 2 months ago (12 children)

Pretty sure that's fake. Why would the yemeni military (who are in a civil war against the huthis) shoot down US drones (which are targeting the Huthis, not the yemeni military)?

[–] nilclass@discuss.tchncs.de 5 points 2 months ago (1 children)

Nice! It makes me feel so much better, if the error that gets me killed is not human error

[–] nilclass@discuss.tchncs.de 11 points 2 months ago (4 children)

With a modern lithium battery that size, this would hold the charge for a lifetime

[–] nilclass@discuss.tchncs.de 3 points 2 months ago (3 children)

Jamming radio is pretty basic, and then the drones are useless. Unless the operator is close enough so the drone can be controlled by a cable, or visual signals

[–] nilclass@discuss.tchncs.de 6 points 3 months ago (2 children)

They are unreliable, since people started storing their damned clouds in my sky

[–] nilclass@discuss.tchncs.de 5 points 3 months ago

If you drop them all the way from the top of the stack, this is what happens

[–] nilclass@discuss.tchncs.de 2 points 3 months ago

Du meinst, das ist der stark verlängerte Arm der Mathematiklobby.

[–] nilclass@discuss.tchncs.de 5 points 3 months ago

Das ist natürlich unzumutbar! (Im Gegensatz zu Parkinson)

[–] nilclass@discuss.tchncs.de 4 points 3 months ago

You can become one too! Get your certification here https://mt.cert.ccc.de/

[–] nilclass@discuss.tchncs.de 8 points 3 months ago* (last edited 3 months ago)

For now it's a "joke", next week it'll be recorded history

24
submitted 10 months ago* (last edited 10 months ago) by nilclass@discuss.tchncs.de to c/vegan@lemmy.world
 

Unfortunately I cannot find it anywhere online. It doesn't help that there is no brand name on it ;)

EDIT: The product is http://milebv.eu/index.php/products/product/25 (thanks to @rbn@sopuli.xyz for finding it!)

I used to buy this at a local vegan store (veganz at Warschauerstr in Berlin), but that store closed a while ago.

It was the most amazing mock duck I've had, but now I can't find it anywhere else. All I have is this picture (I don't even remember why I took it, probably to tell someone how amazing it is).

As far as I recall the product was made in Taiwan, not sure if that helps.

Of course, any other suggestions for tasty mock duck are welcome too, since I just love this stuff 😋

55
What kind of screw is this? (discuss.tchncs.de)
submitted 11 months ago* (last edited 11 months ago) by nilclass@discuss.tchncs.de to c/right2repair@discuss.tchncs.de
 

EDIT: I believe I found the answer, it's something turned by this: https://ctatools.com/products/5065

Found some trash on the street that i'd like to take apart, but this screw is in my way.

It's like a hex bolt, but with 5 sides, and rounded (a bit like flower petals).

Here's another picture from the top:

I tried turning it with various tools (hard to get pliars in unfortunately), no success so far. The material is very soft, which doesn't help..

53
help (discuss.tchncs.de)
 

I can't recall a time when I wasn't lost in the inner solar system. Currently I'm stuck on the third dot - how do I proceed?

Alt


The picture shows today's XKCD comic.

Transcript:

[A grayed-out sentence in the Times New Roman font reads "Optimistic aliens measure space typographically". The "O" in "Optimistic" is dark black and indicated as representing the Sun (not to scale). The dots of the letters "i" in the sentence are similarly dark black. The dot in the first "i" in "Optimistic" is indicated as representing Mercury; the dot in the second "i" represents Venus; the dot in the third "i" represents Earth. The dot in the "i" in "aliens" is indicated as representing Mars. The dot in the "i" in "typographically" is indicated as representing Jupiter. A measurement bar indicates that the distance between the "O" and the third "i" in "Optimistic" is equivalent to 1 AU (astronomical unit).]

[Caption below the panel:] 
Space tip: if you're ever lost in the inner Solar System, you can just type out the phrase "Optimistic aliens measure space typographically" in Times New Roman and use the dots as a map.

 

I am powering a 5V microcontroller (arduino clone, atmega328p) using a 9V block and a buck converter. Now I want to let the microcontroller occasionally measure the battery voltage, so I can get an idea of how full it is.

My first idea was to use a simple voltage divider:

I've chosen the resistor values so that:

  • the voltage at the measure output is < 1.1V, to be able to use the 1.1V internal reference of the atmega's ADC
  • R1 || R2 < 10kΩ, since the atmega datasheet says "The ADC is optimized for analog signals with an output impedance of approximately 10 kΩ or less"

This is great and all, but what bothers me is that this circuit will constantly draw ~100µA from the battery.

So, my next thought was to add a mosfet to the divider, to switch it on only while measuring:

This is obviously bad, because now when the mosfet is off, the ADC input sees the whole battery voltage.

To address that issue, I've added a second mosfet into the measure path:

This works, and it does not draw any current, except while measuring.

However, it's quite a few parts. So I'm curious if anyone has an idea how to do this with just a single mosfet. It seems to me like it should be possible, but I haven't figured out how.

Oh, and if I'm doing something stupid here, please tell me :)

 

I have a whole bunch of them. They are possibly a bit older (70s, 80s) judging by other contents of the junk box they are from.

There are no labels of any kind, but on the top they have stripes that look hand painted.

For at least some of them the resistance roughly corresponds to the color code.

So, I'm just curious why I can't find anything about these on the internet.

 
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