54
Formlabs acquires Micronics
(techcrunch.com)
These fuckers killed every one of my plants
Yeah, it's feeling a bit like Reddit lately.
The word humanity or even the derivative humane, are complete falsehoods. This is humanity, cruel and selfish,dumb and easily motivated towards violence and hatred. We suck as a species.
People have a bigger issue with fish in an aquarium than animals on a zoo, that's so weird seeing as aquarius usually have giant tanks that replicate natural habitat where zoos just have poor animals in pens that are always too small. Fucking weird
I don't think being poor should be cause of being seen to be a rule breaker.
The good old days..
I don't see any of those things reducing microplastics in the environment nor plastic being dumped in the rivers and ocean. The motivation behind recycling has very little to do with climate change.
Plasma gasification can self sustain and generate power
It's so fucking weird
I guess, but I dunno, that still seems dubious to me.
I never understood why people would want polluted air and water, blows my mind.
18
Some advice on creating a 2.4 GHz antenna for Seeed ESP32-C3
(lemmy.blahaj.zone)
Hi,
I'm looking for some help in a field that is super technical and I don't fully understand.
I'm planning on using a bunch of these seeed studio Esp modules for some home automation projects, especially because they have a lipo battery charger making it great for portable stuff.
The thing is the the ESP32s have U.FL SMD antenna connectors. Most of the antennas that you can buy with U.FL connections while are reasonably small, come with 50-150mm leads, which sort of makes the small size of the module a little less valid.
What I'd like to do is get a female U.FL SMD connector and make a small daugherboard with an 2.4GHz SMD antenna on it, for instance a Janson 2450AT42B100 or a Molex 479480001.
They go over the circuit board requirements quite thoroughly so I don't think designing it will be too difficult, but what I don't know is, they say that you need impedance matching on the circuit, and I see that there appears to be something that looks like it on the ESP circuit diagram, but I'm not actually sure if it is or not:
You can see it in the middle near the bottom of the diagram here: Seeeduino-XIAO-ESP32C3-SCH
So my questions are:
1: Is this a dumb idea, having a direct plug-on SMD antenna?
2: Is that an impedance matchning circuit between LNA_IN on the ESP chip and U.FL-R-SMT-1?
3: If I can't get a female U.FL SMD connector, would using one with a lead and shortening it to make the daughterboard able to be much closer to the connector affect anything? Do I need to ensure that the lead length matches the wavelength at all?
Edit: Found this SMD female U.FL, so they do exist.
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KyuubiNoKitsune
joined 1 year ago
It's something to the side of the primary thing. That's the best non dictionary answer I have.