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berikv

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How far can I broadcast LoRa packets WITHOUT a radio?

youtube.com
1 points·by berikv·il y a 12 mois·0 comments

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berikv
·il y a 2 mois·discuss
Badger Badger Badger originally is a flash animation. To properly archive this, both the flash animation and a machine definition which can run that animation (eg: having a browser with flash plugin) should be stored, not just a video file.
berikv
·il y a 9 mois·discuss
“Then there is the % address operator: user %domainB@domainA is first sent to domainA, which expands the rightmost (in this case, the only) percent sign to an @ sign. The address is now user@domainB, and the mailer happily forwards your message to domainB, which delivers it to user. This type of address is sometimes referred to as “Ye Olde ARPAnet Kludge,” and its use is discouraged“
berikv
·l’année dernière·discuss
Please don’t terrify your contractors. They fix your place, and you want them on your side doing a good job.
berikv
·l’année dernière·discuss
This should be my new screensaver
berikv
·l’année dernière·discuss
Also: Fix every bug twice: Both the implementation and the “call site” — if at all possible
berikv
·l’année dernière·discuss
Personally, I’d start with divide and conquer. If you’re working on a relevant code base chances are that you can’t learn all the API spec and documentation because it’s just too much.
berikv
·il y a 2 ans·discuss
Correcting the correction:

> When you connect 2 9000 mAh cells in series, the resulting battery has 2x the voltage but the same mAh capacity. In parallel, the battery has the same voltage but 2x the mAh.

The relevant units are:

* Capacity (Q, in mAh, Ah, kWh, etc)

* Power (P, in Watts)

* Voltage (U, in Volts)

* Current (I, in Amperes)

* Duration (t, in mostly measured in hours)

And the relevant formulas are:

* P = U x I or Power equals Voltage(difference) times Current

* Q = P x t or Capacity equals Power times duration

From this we can establish that connecting batteries in series or in parallel will not change their Capacity. When having 13 batteries of 29000mAh, or 29Ah, you have 13 x 29 = 377Ah or 377000mAh. Connecting batteries in series or parallel does make a difference in voltage and current: a string in series will increase the voltage while keeping the current the same (theoretically, in practice you get less than the current of the weakest cell); a parallel setup will increase the maximum current while keeping the voltage the same (again, in theory).
berikv
·il y a 2 ans·discuss
Same for me. I wanted to contribute, but the amount of dependencies needed to get a local build to run was a major hurdle.
berikv
·il y a 2 ans·discuss
Except that the argument here was about bass, and the paper shows that age dependent hearing frequency response varies mostly in the mid-high range.