Видео

Thank you for your comment. Yes, it’s really amazing what you van achieve on the Arduino platform. I can recommend it for electronics hobbyists and everybody tinkering, because I will provide the code as well when I completed it.

We started to develop a simple lap counter based on Arduino. However, It became much more than that. We achieved this through teamwork: electronics, coding, 3D printing and of course the slot car race track.

Glad you like it! Stay tuned!

Thanks for your comment. Glad you like it.

Thx for your comment. Yes, I agree, will definitely come up with something in that direction.

Thank you very much for your comment. Yes, you can use a reflector. I was showing a NEC simulation on that briefly in that video: ruclips.net/video/a5n_YWJaPkI/видео.html One of my subscribers built it and is using it for feeding a radio telescope. Maybe that would be worth a separate video. What do you think? For the gain, polarization, etc. please check out video: ruclips.net/video/1xigmkPVu0k/видео.html For comparison with monopole antenna: ruclips.net/video/EMwD6QOhwF0/видео.html Concerning an endfire array: a great idea! I definitely will put some investigations into that. BR Klaus

@@electronics.unmessed yes all those ideas are brilliant! I looked at your other videos and your channel is amazing! I might make this antenna for 315 mhz and 433 mhz, I want to see how far I can receive TPMS bursts. Very low power, 500 KHz bandwidth, short randomly spaced bursts. Makes them fun to try and receive/decode. I remember hearing when you start networking antenna elements that the received noise is also a little higher. Is this true?

Interesting! You can probably get a more stable reception and longer range. Concerning the noise: this antenna is a bandpass and an antenna at the same time. So, you can lower noise and interference especially when using simple receivers. Do you want to read the TPMS signals over a higher range?

@@electronics.unmessedYes exactly! I discovered TPMS accidentally one day on youtube and it’s a pretty fascinating challenge to receive. I have a directional antenna (11 dBi) and then a low loss interdigital filter and then a LNA. So far furthest i have received is 240 meters away but I still think I can improve it. The signals are very faint by that distance. Also challenging is the variations in their carrier frequencies, baud rate,modulation scheme and packet format between different sensors. Usually the packet has a MAC address, tire air temp, tire air pressure, some status flags and a CRC. Besides better antenna (and allowing possibly ditching the extra filter) I will try and make some signal models that are highly unstable, where the slightest signal influences a bit flip. It will mostly output noise but the CRC should reject most invalid packets. Since packets repeat a few times in a row, i can filter detections that are not consistent.

@@weirdsciencetv4999 Wow, very interesting! The range you achieve is remarkable. I think it's also a good idea to use repeat signals to correct errors. By the way, we also have a video about it: "Reading Signals above the Noise Level...". ruclips.net/video/3wb2u3xcSwA/видео.html Maybe it will be interesting for you. I have a few questions about this out of interest: Could you stand next to a road with your receiver and receive the data from vehicles passing by? Do statistics? Warn people if they drive with too low tire pressure?

Glad you like it!

Thank you for your comment. That is a very good idea. Due to the skin effect, the currents at 1 GHz, for example, cannot penetrate deeper than 2 micrometers anyway. What would be thickness of electroplating?

Hendrick RUclipsr who I would say is a professional electroplater of 3D prints often makes 3-4 spray paint coatings of graphite paint to ensure perfect smoothness and thickness of this conductive layer then enables electroplating. Electroplating of course is microns compared to the metallic graphite paint. So really the thickness of the metal is derived from these painted layers that can be sprayed or painted. The electroplating is simply a modifier for finish and durability and esthetics.

@@k.o.0 Thank you very much. I don't have any knowledge about electroplating. I was asking the thickness because you need a good conductor for the antenna. No problem when it is only 2 microns or so.

Thanks for your kind hint. MegawattKS is an interesting channel with a lot of examples and experiments that I like a lot. I have seen small loops there, but neither lambda loops (which we have here) nor the type of matching network that I am talking about. These are different antennas. Ich freue mich jedenfalls sehr über Ihren Kommentar. Ich denke jedoch, dass wir weiter suchen müssen. Vielleicht hatte tatsächlich jemand schon einmal diese Idee. BR Klaus

Thank you for your kind comment. I'm glad if you like the tool. I hope you are having a lot of fun and success with it. BR Klaus

Thx for your question. There is no principle limit and you could bild this antenna for 10m wavelength. However, bear in mind that the diameter will be like 3.2m.

@@electronics.unmessed Thank you for the reply. Yes it would be a large antenna. May build it one day to hear the selectivity and noise. LoRa antennas, either UK or USA bands, are interesting.

@@allenshepard7992 I agree with that. But of course it would be extremely cool to use the concept for 10m too. I would really be happy about that.

@@electronics.unmessed If you do, please post. Your building skills are better than mine. Yes, I will put the build on my "To Do" list. Life is not a spectator sport, all must participate and contribute. (smiles) You will never know what you find.

I’ve built a magnetic loop antenna for the 7MHz band. I used 8m of 1/16” aluminium strap with a home made motorised capacitor to tune it. More of a classic loop and cap design. Keen to look into this design which appears to be a full wave loop.

Glad you like it! BR Klaus

Hello Fred, Thank you for your comment. You remind me of something that I need to show better in future videos about this antenna because it is actually a bit difficult to determine the values ​​from the graphics. So, here are the key figures: The 3dB bandwidth of S11 is 442 MHz (18% of the center frequency 2450 MHz). The frequency range in which the SWR is better than 2 is also interesting, because that's what you expect from a good antenna: 206 MHz (8.4% of the center frequency). I'm always happy to hear good questions like this! Have fun with my channel. BR Klaus

@@electronics.unmessed Good, that should cover the entire ISM band.

@@FredFierling Yes, that is correct.

no worries: max directivity = max gain, but in other cases you might look for omnidirectional = zero gain

Maybe this episode is helpful for you, because you can play with the spreadsheet to understand some basics about antennas:ruclips.net/video/D5sfIe_TWAE/видео.html

Thank you for your comment! Yes, I think you nailed it. In addition to knowledge, I also want to convey inspiration. The channel actually needs a lot more views. I'm always particularly happy when someone comments on my somewhat complicated content. Maybe you have friends who are also interested in the channel?

Hello and thank you for your comment! I actually forgot to include the link this time... which I've done now. Below the video you will find a Github link where you can download the EXCEL tool. Happy making!

EXCELlent!

@@electronics.unmessed Awesome, Thank you! I got the file to open with "Apache OpenOffice" incase anyone else wants a free program for xlsx files. One more question, what is the radiation angle with these loops? EDIT: I found it, episode #35 is what I was looking for! I love your work, keep it up! Episode #35 linked here...... ruclips.net/video/1xigmkPVu0k/видео.html

Great that you like it! I'm pleased! By the way, there are a whole series of videos about this antenna on my channel. Thanks for the info that my spreadsheet runs on “Apache OpenOffice”. Is there also a solver, similar to MS EXCEL?

That‘s what it is 😉

glad you like it! Stay tuned.

glad you like it!

Hello and thank you for your detailed comment! I think your ideas for the magnets are all very good. By the way, my magnets are relatively weak, they are rather inexpensive. Therefore the case is actually easy to open. With larger and stronger magnets you could of course increase the force that holds the housing parts together. The small text on the case is also a bit problematic in my case. I can confirm what you said about it and there are other issues with it as well. If you use a little trick, the text is still quite legible. Maybe it would be worth making a separate video about the magnets and the text? What do you think about that?

​@@electronics.unmessed I think it would be good to elaborate on the details, especially in a separate video as those who want to know more can then look at the other video while keeping the main video more general. Each subject could have its own video as there's a lot of ways to use magnets and lot to know about 3d printing text. I did a quick search on YT to see what people do about small text and didn't find much, one suggests adjusting a slicer settings to improve the output, while the other advises printing text on the side walls instead of top/bottom. I'm sure a lot more could be explored, like layer thickness, temperature, speed, font, etc, so a video just on the text could be very interesting.

Thank you very much for your investigations and your good comments. That is all noted! I will definitely consider this in my future videos.

I am glad you like it! A good point that you are making here with the FLIR thermometer.

Thx for subscribing my channel. Sorry, I didn't explain the reflection measurement in all details in the video. You are seeing the reflection loss in yellow and the SWR in light blue. From the latter, you can derive that in a 150 MHz wide range you get an SWR better than 1.5. This is completely sufficient for the 2.4 GHz WiFi band, which is only 80 MHz wide. However, with my dimensions, the center frequency is a bit too low, which I explained in the video.

Hi there, thx for your comment! As I said in the video, the center frequency is 17% lower, which is for the reason that I simulated thin wires, but realized the antenna with 5 mm wide copper stripes. This also lowers the impedance a bit. However, I am pretty sure, that the radiation characteristics of the realized antenna will be close to the simulated ones.

@@electronics.unmessed thank you! Great insight into how the construction materials impact the final result. Looking forward to more of your work!

I am glad you like it!

Hi there, thx for your comment! That is a really nice idea. Maybe we will take up the idea in one of our coming projects. Stay tuned, there is more to come with our Speedo project.

Thanks for your comment! I searched a lot on the web. I found a lot of interesting antennas on KF2YN, but I couldn't find the ones shaped on this principle. Could you please give the web address where you found this?

@@electronics.unmessed www.in3eci.it/bbb/file_content/fl427.pdf

@@electronics.unmessed *****www.in3eci.it/bbb/file_content/fl427.pdf******

@@electronics.unmessed RUclips deleted the link, "in3eci.it/bbb/file_content/fl427.pdf"

Hi there, thx for your comment! I will try to approach him on this.

I am glad you like it! There is more about antennas on the channel. Stay tuned!

Thank you John, I couldn't have said it better!

I am also really curious about it and, of course, I will share the results on this channel. So, stay tuned!

Hi Jeremy, thanks for your comment! Well, in fact the feed network I am using is a kind of BALUN. I chose this "trombone construction" because I can tune it. That trombone is getting large for lower frequencies and you would prefer other constructions using cables or transformers.

Thanks for your comment. Yes, that is right! My English is usually pretty sparse. But once a year I thought I could afford a style element!

@@electronics.unmessed Yeah, so clever. Going by your propensity for parroting that phrase, that would mean the creation of your channel's content would have taken over a century.

Well, the phrase appears twice in this video. But still, maybe I should pay more attention to it in general! After all, I want to make serious content and not give pompous speeches. Thanks for your comment.

I just checked my older video text files. And you are right man! There is a video where it appears several times, oh no! I didn't realize that myself. The average is about once per video. Thank you very much for your hint! I will try to avoid that kind of "noise" in the future.

Thank you for your comment. I am just measuring my first build. And it looks really good so far! Great that you want to build such an antenna yourself. So, stay tuned, there is some more episodes to come.

I like it because it discovers short and rare signals in practically all interesting frequency ranges. I built also a version using an analog gauge.

I am glad you like it!

John, you are bringing it straight to the point: ... the computer doesn't complain ... a fundamental value ... I had to laugh so hard about it this morning. I wish you a nice day and keep your refreshing sense of humor! BR Klaus

Great! Like your idea 👍

Many thank for your comment!

Thank you for your comment! Yes, there is often quite some effort in theory, measurements etc. Nice to read that you got some takeaways.

I am really glad you like it!

Thanks for the compliments! I am glad you like it!

I am glad you like it!

I am glad you like it. Maybe you can recommend it to friends that are interested?

@@electronics.unmessed That's what I did just now! This channel is a hidden gem.

Thank you for your comment and your subscription. I'm very glad about that. My channel is relatively new, it is growing slowly but steadily. I think good content pays off in the long run. The only question is how long it will take for the right people to find them. Maybe you can recommend it to friends that are interested?

Werner, thanks for your comment! I am glad you like it. Stay tuned, there’s a lot more to come on the topic.

Hi John, thanks for your comment. That's an interesting question actually! You are really sophisticated! The inventor optimized a Yagi and a log-periodic antenna successfully as well. You can find it in some books and publications. However, I don't know of any commercial model. Maybe someone out there knows where to buy the antenna? And before you bend your Yagi antenna, please remember that this type of antenna needs longer rods ;-). Maybe I can show one of these in a later episode.

@@electronics.unmessed, thanks for the compliment, but I'm hardly sophisticated. Just a guy with a high-school education who has been curious about things for 3/4 of a century. After a while things begin to make sense. I was guessing that one might be able to squeeze a couple dB or so more from a Yagi by doing this, and yes, I note that the elements would need to be over a wavelength long, instead of roughly a half wavelength. But it would be easy to do on 70 cm, and possible on 2 meters. I've already contemplated trying to build a 70 cm beam with colinear elements, but the logistics involved are difficult for me these days. I'll research this gentleman's work. Thanks for his name. Perhaps there's something posted online I can read.

Yes, exactly, I think you understood everything correctly! I'm currently thinking about setting up such an antenna and making more videos about it if there's interest. Maybe I'll build the simple dipole antenna first and then the Yagi later. So stay tuned!

Glad you like it!

Thank you for your comment! The electrical connections with the header pins are actually a weak point. But surprisingly, they have lasted for years in my projects. I've also had the experience that they no longer hold after being plugged in and unplugged a few times. That's why I soldered the pins to the board and not the sockets. This way I can simply replace the cables with the sockets with new ones when they are worn out. I can also simply solder the cables to the pins if there are problems. A website that updates very quickly is of course essential for the project. I've posted the code for this along with an earlier video. It is quite complex, at least for DIY, because doesn't the entire website, but only individual values when they change. By the way, I am continuing to develop the code and implement new functions, like a WiFi manager and additional racing features. So stay tuned!