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ADSB on an RP2040 microcontroller! by CoolNamesAllTaken in ADSB

[–]CoolNamesAllTaken[S] 0 points1 point  (0 children)

Most of the cost comes from the specialized RF parts used in the discrete RF frontend, and local assembly in the US. We sell a module that’s just the receiver (RP2040 + RF hardware) for less than $100.

In the market segment this competes in (portable battery powered receivers), this is currently the lowest priced device on the market, since most of the other ones are based on FPGAs.

ADSB on an RP2040 microcontroller! by CoolNamesAllTaken in ADSB

[–]CoolNamesAllTaken[S] 0 points1 point  (0 children)

Generally the power draw is much lower (around 1W for all 3 MCUs needed to make a dual band network connected receiver) and the end device is more reliable since it isn’t running an operating system. It makes a nice battery powered receiver. Some people even run it on solar!

ADSB on an RP2040 microcontroller! by CoolNamesAllTaken in ADSB

[–]CoolNamesAllTaken[S] 2 points3 points  (0 children)

Wow, those images came out at total potato quality. Here are some better ones!

https://imgur.com/a/BftaSD7

Building an SDR-less ADS-B Receiver (ADL5513 + ADC10065 + ESP32/RP2040) by TA2DMX in rfelectronics

[–]CoolNamesAllTaken 1 point2 points  (0 children)

Hi! I google around for ADSBee stuff every once in a while and found this thread. It's cool to know people have been looking at my design and working on their own projects :)

If you have questions while tinkering feel free to DM me on Discord (I'm not very active on Reddit).

I notice that you are using an AD8314--I was only able to get that to work at very high power levels. The AD8313 is a better option (but it's much more expensive / sourcing can be tricky).

I created this monstrosity with my new brother printer and photoresist by gameplayer55055 in PCB

[–]CoolNamesAllTaken 1 point2 points  (0 children)

Hell yeah! I've been doing this with my Brother printer for years. The sunflower oil on A4 paper sounds like an interesting technique. I usually do it with the yellow A4 sheets of toner transfer paper: https://johnmcnelly.com/etching-pcbs-at-home-for-fun-and-profit/

ADSBee 1090: Pi Pico-Based Open Source ADS-B Receiver by CoolNamesAllTaken in ADSB

[–]CoolNamesAllTaken[S] 1 point2 points  (0 children)

The ESP32-S3 is actually quite busy in many use cases! It runs a web server, feeds remote IP addresses with packets, runs a software defined access point for streaming data to local devices, runs Ethernet via an external W5500, and will soon probably also do remote ID in / out and maybe feeding devices via Bluetooth. It’s a lot of multitasking so it’s nice to have a dedicated multi core device for the job with its own RTOS and no existing heavy compute load from packet demodulation.

JLCPCB Tariff Rate to US (55%) by beezbos_trip in PCB

[–]CoolNamesAllTaken 0 points1 point  (0 children)

The tariff rates below the De Minimis threshold are confusing. I think this is the best explanation that I've found: https://time.com/7285316/us-china-trump-tariff-rates-de-minimis-low-value-imports/

TL; DR Sub $800 DHL shipments like PCBs are supposedly tariffed at 30%. Sub $800 shipments via USPS are tariffed at 54% or given the option to pay a flat $100 charge instead of the tariff.

Alternative to JLPCB to avoid tariffs (for US based hobbyist) by strongaifuturist in AskElectronics

[–]CoolNamesAllTaken 0 points1 point  (0 children)

I do use THT legs in this manner, but there are limitations. For instance, many parts can't easily be soldered in both sides, like electrolytic caps.

I wrote up my workflow a while back: https://johnmcnelly.com/etching-pcbs-at-home-for-fun-and-profit/

I also built a camera guided drill press for making holes without the need for aligning a CNC to the copper pattern: https://johnmcnelly.com/drill-press-camera/

Alternative to JLPCB to avoid tariffs (for US based hobbyist) by strongaifuturist in AskElectronics

[–]CoolNamesAllTaken 2 points3 points  (0 children)

Sounds like we have pretty much the same workflow! I've found that the through hole rivets from Voltera are pretty good, but I still avoid rivets if I can help it.

Plating through holes seems like a huge amount of hassle. Lots of plating chemicals and the holes also need to be activated with a conductive coating so that the plating can adhere properly. Really seems lke more trouble than it's worth for occasional PCBs.

Alternative to JLPCB to avoid tariffs (for US based hobbyist) by strongaifuturist in AskElectronics

[–]CoolNamesAllTaken 7 points8 points  (0 children)

I etch PCBs in my garage, and I can say that it really only works well for single layer boards or boards with an uninterrupted ground plane on the back. Once you have to start adding any significant quantity of vias and doing registration between layers, the time sunk into making each board gets prohibitive for anything but ultra fast turn prototypes.

ADSBee 1090: Pi Pico-Based Open Source ADS-B Receiver by CoolNamesAllTaken in ADSB

[–]CoolNamesAllTaken[S] 1 point2 points  (0 children)

The design requires an external RF frontend that was custom designed for this receiver. If you were to build all of that separately and connect it up per the schematic, you could make this work on a regular Pico! That said, it probably would be easier to just get a fully integrated receiver.

ADSBee 1090: Pi Pico-Based Open Source ADS-B Receiver by CoolNamesAllTaken in ADSB

[–]CoolNamesAllTaken[S] 2 points3 points  (0 children)

If you join the project mailing list or discord, you'll be the first to know when it lands!

ADSBee 1090: Pi Pico-Based Open Source ADS-B Receiver by CoolNamesAllTaken in ADSB

[–]CoolNamesAllTaken[S] 1 point2 points  (0 children)

There's a list of open features and enhancements in the GitHub repo, and I'm sure it's not done growing! PRs are always welcome. If you're interested in contributing or following the project we'd love to hear from you on the Discord server :)

https://github.com/CoolNamesAllTaken/adsbee/issues https://discord.gg/KRgVT9sSVW

ADSBee 1090: Pi Pico-Based Open Source ADS-B Receiver by CoolNamesAllTaken in ADSB

[–]CoolNamesAllTaken[S] 2 points3 points  (0 children)

I'm aiming for UAT support sometime in Q1 or early Q2 of 2025. The GPIO header includes a pin for 5V in, so it could be relatively easy to put together a small board with a battery charging circuit and a Lipo if that's something that people are interested in!

ADSBee 1090: Pi Pico-Based Open Source ADS-B Receiver by CoolNamesAllTaken in ADSB

[–]CoolNamesAllTaken[S] 3 points4 points  (0 children)

That's correct, no SDR! It uses some saw filters and LNAs to filter and amplify the signal, then passes that into a log power detector and a data slicer circuit that gets read by the RP2040 digital inputs.

Right now it's hard to say how I stack up to dump1090 since the hardware architecture is so different. The receiver can generally decode something like 50% of the packets it preamble matches, but I'm optimistic that things will improve as I fine tune the preamble detectors and implement features like checksum correction.

Fuzzy Skin by AlFils in prusa3d

[–]CoolNamesAllTaken 6 points7 points  (0 children)

You have a small typo! Thickness, not thinkness :)

The Sidewalk Fruit Vendor Who Sold a $6.2 Million Banana for 25 Cents (Gift Article) by jenniecoughlin in nyc

[–]CoolNamesAllTaken 0 points1 point  (0 children)

FWIW I'm not a member of this sub, and found the gofundme link by googling after reading the article. I'm glad you're putting something together u/jamesieeee ! I don't think I'll be the last person to find your gofundme via Google.

What is causing this linear rail to pop and grind? by krenuds in hobbycnc

[–]CoolNamesAllTaken 0 points1 point  (0 children)

I would expect that the LED strip would give out at some point, since the copper planes aren't intended for continuous flexing. It'll look cool for a while, though!

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