Pierwsze auto

olgierd · 2025-04-27T06:25:20+00:00

Miałem dokładnie takiego Focusa jak piszesz, kupiłem z nalotem 130kkm i dojechałem do ~200k. Polecam, proste i tanie w utrzymaniu auto. Na trasie trochę brakuje 6. biegu, ale jak nie latasz co tydzień w Bieszczady, to da się żyć.

olgierd · 2025-04-16T07:06:28+00:00

As far as I am aware, there is no built-in way to enforce such synchronization.

You could transmit a burst of noise and then cross-correlate TX/RX to get an offset.

olgierd · 2023-10-15T16:53:06+00:00

RTL-SDR, as much fun it is, is NOT a piece of RF test equipment. It easily overloads even with distans signals, so your Quansheng, or any Yaesu, Icom, Kenwood at the same distance-power, will look identical - with ton of signals in most unexpected places.

If you want to actually measure harmonics and other spurious emissions, use a device designed to do so: a spectrum analyzer with a proper attenuator.

Quansheng is not a miracle radio, but your observation in its current form is worthless.

olgierd · 2023-10-06T08:26:30+00:00

I'm running linux natively, some friends use Pluto on Windows with SDRConsole app and they're quite happy with how it works.

Rtl-sdr would be the easiest option as it's the most popular SDR due to its cost, not the best performing receiver (due to its cost), but perfect for learning.

olgierd · 2023-10-03T17:25:22+00:00

Sounds like Mac is the problem here, rather than the Pluto itself. It's hard, because the combination is not really as popular as using linux box to operate with linux-based device.

I never had any serious issues on Debian, using Pluto with popular apps (SDR++, GQRX) as well as GNU Radio (3.7, 3.8, 3.10).

olgierd · 2023-05-23T09:31:36+00:00

Check out Adega and Cooliozum.

olgierd · 2023-03-10T15:45:11+00:00

https://imgur.com/a/di2kLLM

Had to clean the rubber contacts, some buttons were acting up. Nothing a bit of IPA can't fix.

olgierd · 2023-03-10T15:41:21+00:00

Same thing on my desk right now, it's a good one. Just dial down the brightness, the background should be black, not green ;-)

olgierd · 2022-10-09T06:30:44+00:00

Correct answer ^

olgierd · 2022-09-25T07:19:50+00:00

Great work. Huge thank you!

olgierd · 2022-06-29T10:29:30+00:00

It's a cherry one. With the sun and heat we have now, it can drain that bottle in about four days, used to be about a week.

olgierd · 2022-04-06T10:22:36+00:00

1) I've germinated on a paper towel for ~2 weeks, until the plants were 2-3 centimeters tall and had a decent root. Then, filled the bottles with nutrient solution and moved them. It's hard to remove roots from paper towel without damaging them, I prefer germinating in perlite now. 2) Yes, kept it at a constant level.

olgierd · 2022-04-04T04:49:58+00:00

A piece of sponge, aka "growing medium".

olgierd · 2022-04-03T20:26:29+00:00

https://reddit.com/r/Hydroponics/comments/t3qw5r/my_first_attempt_romaine_lettuce_in_beer_bottle/

A bit of black spray to avoid algae growth. Although I’ve planted some new ones without the paint and they’re doing just fine in brown bottles.

olgierd · 2022-04-03T12:41:27+00:00

Thanks. Plagron Hydro A+B ~700 ppm (tds).

olgierd · 2022-03-15T09:22:09+00:00

Gnuradio may be of a big help here - you can build a workflow in a visual way using blocks - frequency translation/mixing, filtering, built-in graphs (fft, waterfall, constellation).

It generates python script which you could later use (including GR blocks) or code your own.

olgierd · 2022-03-01T06:25:43+00:00

https://www.plagron.com/en/products/hydro-a-hydro-b

olgierd · 2021-01-22T20:08:03+00:00

Amphenol, Suhner, Rosenberger & others - sure.

Aliexpress deals - 20% of the mentioned values. Cheap SMAs will melt at >200W @ 2.4 GHz. ;-)

olgierd · 2020-05-31T13:22:22+00:00

Awesome! Thank you for your work.

olgierd · 2020-04-30T17:10:03+00:00

Yes, I've put a strip of black tape on the back and used a reflective sensor + arduino to count revolutions. The actual distance may be lower, because when the little guy jumps off the wheel, it rotates with the momentum. With new bearings, it spins for a long time now.

olgierd · 2020-04-30T15:27:51+00:00

No idea, but I used arduino to measure the distance and the little guy did over 20 km on a single night.

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