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berikv

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How far can I broadcast LoRa packets WITHOUT a radio?

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1 points·by berikv·12 tháng trước·0 comments

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berikv
·2 tháng trước·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
·9 tháng trước·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
·năm ngoái·discuss
Please don’t terrify your contractors. They fix your place, and you want them on your side doing a good job.
berikv
·năm ngoái·discuss
This should be my new screensaver
berikv
·năm ngoái·discuss
Also: Fix every bug twice: Both the implementation and the “call site” — if at all possible
berikv
·năm ngoái·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
·2 năm trước·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
·2 năm trước·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
·2 năm trước·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.
berikv
·2 năm trước·discuss
And you are? The one who deals out the stereotypes?
berikv
·2 năm trước·discuss
Not saying you are wrong, but this is anecdotal. I’d rather try to interpret crash statistics than use my own experience.
berikv
·2 năm trước·discuss
All of this. Plus the exhaust gasses and tire wear pollutants causing early deaths. The noise (bigger) cars make disrupting quiet places like parks and porches, balconies, bedrooms causing stress. The waste of used cars, often being transported to third world countries. Cars kill in so many ways, especially big cars.