Відео

Thank you for your comment! Yes, you could actually try that with flexible materials. However, a big hurdle is the fact that radio signals are quite volatile, which means you have to do appropriate statistics to measure the improvement in signal strength and SNR. A better option could be to do a computer simulation and optimization. A research field on its own ... Do you have a concrete idea for it?

Thank you for your comment! Yes, copper foil is the right material! My design was just to verify the dimensions.

I am glad the video helped you a bit! Stay tuned!

Hi John, I'm particularly pleased that you like the video, because your comments are always very valuable. It shows us that we are on the right track with the channel! Best wishes from Stuttgart, Klaus

Thank you for your comment! The gain is about 4 dBi, which is not much more than a simple dipole. However, the antenna is producing a significantly better reception signal mainly because it receives all polarizations. I've tested and explained this in previous videos. Might be interesting for you. Regarding the diameter: The antenna is resonant and quite frequency selective. If you change the diameter, you obviously change the resonant frequency. You can increase its gain using a reflector, see recent videos about radio astronomy.

@@electronics.unmessed Perfect, thanx!

Das war sicher schwer herauszufinden ;-)

Thank you for your question, which I'm sure many HAM radio operators and their neighbors are asking. I'll have to think about it for a moment and then I'll give you an answer here.

OK, for 1kW and 5m the power flow is even lower than in the HAM radio example in the video. It is 3 orders of magnitude lower than the limit. So you are on the save side by far. Even when we consider that there is an additional near field at a distance smaller than 1 wavelength.

@@electronics.unmessed thanks for info ,

I am glad you like it. There is a whole series of videos explaining all aspects. The complete schematics you find here: ua-cam.com/video/gxdyIW4vtOo/v-deo.htmlsi=rHPRS1nBAPzl5-Qi

@@AndrinaRich I am glad you like it! Stay tuned.

Hoffe die Formeln helfen Dir weiter. Viele Grüße aus dem heißen Stuttgart - aber Saarland ist wahrscheinlich noch heißer!

Thanks for your comment! I'm glad you like the video. I just wanted to demonstrate how you can estimate the radiation from the radio services that everyone is using.

also wanted to ask, do you see that in the future itll at have 4 and 6 lane support

Great that you want to use it! I assume, you tried the new version 5.2 with the WiFi Manager. Can you be a bit more specific? Can you connect to the WiFi Manager? If you managed your ssid and pass, your router is assigning an IP-address which you can see on the serial monitor of your Arduino IDE or you can find it in your router. Copy that IP-address to you router and then it should work.

Let's see, in case there is sufficient demand and willingness to support the project. Technically it should be possible.

Let me know, if the problem persists!

Thanks again for coming up with this. There is good news for you: I did several tests and found out that some ESP32 boards seem to have problems with the watch dog timer in the code! In that case you can enter your credentials in the WiFi manager, but the web server is not coming up! So I created a second version 5.2.2 without WDT. This should work with all boards!

@@Klaus-b1u Glad you like it! Thanks for your comment.

@@Klaus-b1u Glad you like it and thx for your comment!

@@MeinElektronikHobby Eine alte Carrera124 Rennbahn würde doch auch super zu Deiner Sammlung passen, oder nicht?

@@electronics.unmessed ich hatte noch nie eine elektrische Eisenbahn, geschweige denn eine Carrera Bahn. Da hatte ich wenig Interesse dran. Lieber habe ich mit einem "Meccano" (später Märklin) gebastelt und dann kamen schon die KOSMOS Kästen, die mich immer noch begeistern. Die Elektronik kam dann später durch die Ausbildung in der BASF.

@@MeinElektronikHobby Meine Neffen haben eine kleine Bahn mit zwei Autos von mir geerbt und haben die dann Autos, Schienen und ein Labornetzteil dazu gekauft. Das Ding macht richtig Spaß…

Thank you for your comment! Glad you like it!

Danke für das Lob!

Hi Tom, Thank you for your comment and I'm glad you're interested on the topic. That's actually a very good question. The lambda loop antenna radiates mainly perpendicular to the plane of the loop. The radiation pattern is a bit more complicated than you would think, because all polarizations are generated, and the antenna resonates in two modes that are perpendicular to each other. This is very different from a magnetic antenna, which is much smaller than the wavelength. That's a pretty complicated answer to a simple question. I've published several videos on this channel explaining this in detail. The current distribution, the equivalent circuit, the working principle, the radiation characteristics, etc. is analyzed. Hope the earlier videos are informative for you. In any case, don't hesitate to ask further questions. BR Klaus

Vielen für die Daumen hoch! Es wird mindestens noch weiteres Video zu dem Thema geben.

@@Klaus-b1u glad you like it, check out the videos about the gauges!

Thank you for your comment. There will actually be some videos coming about EMF, EMC, measurements, limits, etc. So stay tuned!

Thank you for your humorous comment! I hadn't thought of an association with the Olympic rings before. Maybe I'll do something with five rings.

@electronics.unmessed No offense intended, of course. Entschuldigung. I think using the five ring shape may behave, demonstrate, the properties of a "Slot Antenna".

No problem, a bit of fun is always welcome! I even think that this is a way to encourage innovation. I don't understand the idea of ​​the slot antenna and the rings though. Can you be a bit more specific?

Ich kannte OpenSCAD nicht bis mir Al den Hinweis gegeben hat. Ich finde auch, es ist ein Super Tool. Wenn man ein Skript hat, dann muss man keine Hürden überwinden, um es anzuwenden. Ein echter Tipp für Einsteiger!

Thank you for your comment! Yes, I feel the same way myself and many experts do. So I thought I would explain it briefly and present a few handy formulas. I'm glad the video helps you.

John, thank you for your comment! I'm thinking about how I can create a kind of catalog. Some fans have already sent me pictures, so I could make a small gallery with them. I will put out a call for interesting frequencies. So stay tuned!

Freut mich, dass Dir das Video gefällt!

Hi there, thanks for your comment. I also searched for the footprint for a long time and still couldn't find it. So I simply made a pad with the connections at the right distance and did the labeling myself. It's actually not that much work. Instead of a 3D model, I simply used a photo of the board. See also: ua-cam.com/video/gxdyIW4vtOo/v-deo.html

Thank you for your comment! Yes, I agree with you. The representation of numbers is always a challenge when it is not consistent. I have actually thought about it a few times. I just checked: there are about the same number of comma regions and dot regions. Then there is the Momayyez region, which makes up maybe 20 percent. Also interesting: In Canada, it doesn't even seem to be consistent across the country. But OK, I really have to pay more attention to making sure I get it consistent at least in a video. Thank you for pointing out the MCP3008 AD converter. That is definitely the way to go if you need more accuracy. I have a few projects on my agenda for that too. The ADC input is often sufficient, although it also has a few other problems. I actually use the stabilization capacitor too. I also like to program a moving average to measure the voltage.

Hi, thank you for your comment. The solver is an Add-in from MicroSoft, which you can download: support.microsoft.com/en-us/office/load-the-solver-add-in-in-excel-612926fc-d53b-46b4-872c-e24772f078ca#OfficeVersion=Windows Hope that helps. Happy making! BR Klaus

@@electronics.unmessed Thanks, Klaus

Klaus, I made a openSCAD script that seems to be able to generate the antenna shape. If you're interested, how do I send it to you?

Great! You can use the e-mail address that you will find under the channel info. I am using FreeCAD. Hope I can import the openSCAD script format.

Thank you very much for your detailed comment and your interesting tips. I will discuss them all with my 3D printing nephews. Stay tuned!

Sure, in a coming episode. Stay tuned!

glad you like it 😉

Glad you like it! Stay tuned!

Yes you nailed it. I built it for 70 cm. Maybe the next one is for 2m.

In that case nothing to worry about. I am using this indicator to see if the calculation model is still valid for the other options. I haven't adjusted that on this sheet yet. Thank you for your comment. I'll have to improve that in a future version.

I'm very pleased that you like the idea. There are several videos on the subject of analog gauges. Have fun building.

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: ua-cam.com/video/a5n_YWJaPkI/v-deo.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: ua-cam.com/video/1xigmkPVu0k/v-deo.html For comparison with monopole antenna: ua-cam.com/video/EMwD6QOhwF0/v-deo.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...". ua-cam.com/video/3wb2u3xcSwA/v-deo.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 UA-camr 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.