AddOhms

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@firewing3229 Күн бұрын

Is there any exception in ac voltage direction

@AddOhms Күн бұрын

Huh?

@diydantex6150 2 күн бұрын

Very good tutorial. Thank You

@5gallonsofwater495 8 күн бұрын

thats why when i record a slow motion video indoors, the lights seem to flicker!!

@AddOhms 8 күн бұрын

If you can set your shutter speed to a multiple of the AC Mains frequency, it will minimize the effect.

@r_be 9 күн бұрын

It's a pity that there is no 6CH option. I think 8CH will hardly be ever used by any applications. I am torn between 4CH and 8CH variants. For power electronics, 6CH would be great, but I am finding very hard to justify the extra 15K - 20K for 4 more channels. What are your thoughts, people? I need some second opinions.

@AddOhms 8 күн бұрын

If you're doing anything with more than 2 phases, then >4 CH is a very nice option to have available.

@julianpitre00 12 күн бұрын

If the energy output fluctuates with ac how can it run appliances that need a certain amount of voltage to operate?

@AddOhms 12 күн бұрын

You are mis-using the term energy. Energy is a property and can be expressed in forms like light, heat, and electromagnetic waves (electricity). The voltage and current are what change and, for AC Mains, they change as a sine wave. The voltage changes because of how AC Generators work. The current changes because of Ohm's law. Older appliances worked directly with AC mains. They were mostly just inductive motors (which is how fans work) and resistive heaters. Anything that requires DC, uses an AC to DC converter.

@julianpitre00 12 күн бұрын

@@AddOhmsyes energy being electricity in this case thought that was obvious but ok… so what you are saying is newer appliances appliances/ lights prefer to use dc because it is more stable? Im trying to figure out why you would choose ac over dc or vice versa.

@AddOhms 12 күн бұрын

Stability has nothing to do with it. Over 100 years ago, it was easier to generate AC.

@julianpitre00 12 күн бұрын

@@AddOhms do ac and dc deliver the same results under the same conditions?

@AddOhms 11 күн бұрын

In terms of transmission, yes.

@universeisundernoobligatio3283 13 күн бұрын

Tried KiCad 8 on my IMac, crashes every time I try to open a PCB, went back to version 7

@Psi117 13 күн бұрын

Hi James! How did you get access to the console login? Using the onboard port or through ethernet port? Thank you!

@AddOhms 13 күн бұрын

I didn’t. It only briefly showed during boot.

@DBZclipZ 18 күн бұрын

So if a lightbulb in the house switched on is operating an AC can you record it and show us in slow motion how the human eyes is not seen it dim

@AddOhms 18 күн бұрын

Yes. Tons of slow motion video already exists of it.

@MCCollet 20 күн бұрын

Ok let me ask you this. I have a optocoupler with as a base a sensor that makes the led light up just great. On the transistor side I need a 24VDC signal with a logic 0 between 0 and 7.1 volt and a logic 1 between 9.7 and 28v. I get 23V and 22V that means that I need to pull down the signal when the circuit is open right? So I guess a 10KOhm resistor between the pin (emitter) and the GND would help to get the signal to below 7V? Please let me know if I understand this right.

@AddOhms 19 күн бұрын

I don’t understand the question.

@rcnelson 21 күн бұрын

A text on electricity that's over a century old said that, if I understood it, electrons don't actually flow at all in any direction, but that the "state" of the wire is changed.

@AddOhms 20 күн бұрын

That doesn't make any sense. Electrons are always moving (except at Absolute Zero.) It has been well proven that electrons move in the direction of an electric field. We know they move because conductors get hot. The only way they can get hot is because something inside is moving.

@kwissiekwissie Ай бұрын

Wow!!! this is a GREAT video. Long enough to understand, Short enough to be interesting!!

@jtmcfarland3512 Ай бұрын

What a cop-out answer. You have a shirt that says you're good at math. Where's the formula? If you're running I2C in Fast+ and you have a moderate Cb, then you better do the calculation or you'll be stuck in Standard mode.

@AddOhms Ай бұрын

kzbin.info/www/bejne/pGPIkoxrZteegLM. Spoiler: do all math and end up with a ridiculous range.

@nsovomabasa5014 Ай бұрын

IGBT

@nickybeingnicky Ай бұрын

This is a very informative video.

@traction517 Ай бұрын

I got my degree in electrical engineering 8 years ago but never practiced. I went into construction right out of college. My senior project was a I/O and hardware integration project using a microprocessor. I’m trying to create a similar project as a fun DIY project and totally forgot the basics. This video helped jog my memory and brought back many good memories. Thank you.

@AdrianAncona Ай бұрын

From the title and your introduction, I was hoping to actually get the math behind choosing a pull-up resistor. Sadly, as all most sources, you didn't actually answer that question

@AddOhms Ай бұрын

I2C is one of the few cases where the math sometimes matter: kzbin.info/www/bejne/pGPIkoxrZteegLM (and even when you do the math, the range is massive)

@AdrianAncona Ай бұрын

@@AddOhms Thanks for the quick reply and for the link to the more detailed explanation. The answer seems to be: Start with the recommended, measure and experiment.

@spannercrab4120 2 ай бұрын

If you do not make it as an engineer then maybe a comedian... either way you are awsome

@williamschurman6564 2 ай бұрын

Oh my god it literally all makes so much sense now😂😂

@HSong-qr7dn 2 ай бұрын

Do they have any idea of fixing mxo4 triggers speed slowdown when some measurements are enabled? Seems like the keysight hd3 doesn't have that issue.

@AddOhms 2 ай бұрын

R&S has added significant functionality to the MXO since its release. Additional measurements, more Spectrum channels, Math, Zone trigger, and a unique decode accelerator. Some of it is covered in my MXO 5 video: Four things the MXO5 oscilloscope does faster than any other scope kzbin.info/www/bejne/f6eknZVvod1km9U

@HSong-qr7dn 2 ай бұрын

@@AddOhms I've tried to update the firmware but seems like the same, once put some measurements there it won't able to maintain 4.5M trigger speed 😭

@andymouse 2 ай бұрын

Awesome shirt !

@LloydChristmas_III 2 ай бұрын

literally the lines look the same size for battery you said the small bottom line is a negitive well is it the middle line or is the the bottom line which one is it;

@AddOhms 2 ай бұрын

When drawn as I did, that indicates two cells in series.

@LloydChristmas_III 2 ай бұрын

@@AddOhms thank you lol i was confused your vids helped me tho thanks

@schlotdoglaser 2 ай бұрын

I am a noob to KiCAD (PCB design actually), and so far, it is very easy and I love the price.....>FREE. I am in the process of doing extremely basic board design for a project I am doing. Thanks for the tips for this noob

@cphVlwYa 2 ай бұрын

@@schlotdoglaser Same here! I decided to make my own RP2040 dev board as a test project following the pi foundation's hardware design guide. There's tons of detail in it, so it makes for a great starter / learning project! My boards and parts just got here today actually so wish me luck with my first attempt at SMD reflow soldering!!!

@jayrap94 3 ай бұрын

I find it fascinating how many international electric trains have to be able to collect power from many different voltages, frequencies and a mix of AC and DC - like a train designed to run from France to Germany through Belgium and the Netherlands has to be capable of 25 kV 50Hz AC, 3 kV DC, 1.5 kV DC and 15 kV 16.7 Hz AC.

@somewarez6952 3 ай бұрын

Thank you for the video, I found it very helpful. But one thing, I know this is from 8 years ago but the title to this says its a LM7805 but you show ML7805A, this is a bit confusing. I know these are a little different from each other as the ML78xx as a minimum Turn On Voltage of 7v where as the LM78xx has a minimum Turn On Voltage of 5v. Again, thank you for the video.

@AddOhms 3 ай бұрын

Neither has a “turn-on” voltage. They drop their dropout voltage, which is about 2 V. So they both need at least 7V in to guarantee 5V out. I don’t know where you’re getting your misinformation. There is no functional difference. In this case, LM and ML are the (original) vendor’s initials.

@somewarez6952 3 ай бұрын

@@AddOhms Sorry I meant no disrespect, I was just confused with the (LM7805) in the description of the video but yet you show the ML7805, and yes there are specific differences from different vendors. As for the TOV I'm not exactly sure where I found that but I guess that should be a minimum voltage and even that is different per the different spec's I've been looking at. Sorry if I sounded disrespectful, I wasn't trying to be. Also, the LM7805 seems to have a steady output voltage of 5v where the ML7805 has an output range from 4.8-5.2v, and the ML7805 has a higher maximum input voltage.

@TheYear2525 3 ай бұрын

But I can't post my code! 😭 I'd like to edit a question that I had here on youtube. I found my own solution and wanted to share the linux command I came up with. But that seems to trigger the spam(?) anti-code-incection(?) filter. The thing that makes me mad is youtube not seeing a need to inform commenters why their comments fail with things like "returned error". I'm getting this with chemicals formulas as well. But can't pinpoint where the problem is with them. I thought it'd be some kind of "you can't talk chemistry here, because boom", but doing my research on this (again...) now makes me think the chemical formulas might get interpreted as code. KZbin is being redculous. Once more.

@AddOhms 3 ай бұрын

KZbin doesn’t even inform the channel owner when stuff is auto-deleted, so we don’t even know why it is happening. Having any kind of technical discussion in the YT comments is pointless and every creator points people to other sites (like forums or Discord.) That said, this video was made for an Arduino forum …

@zanastill6166 3 ай бұрын

Thank you so much for this video 😊😊

@MarkEzege 3 ай бұрын

Diode

@Cherizarcapital 3 ай бұрын

Thank you 👍

@samithetechsavvy6485 3 ай бұрын

this video is riddiculously amazing. thank you very much.

@Starlite4321 3 ай бұрын

Love your videos, thanks ! Question: did R&S ever release the rumored f/w update to fix the things you mentioned in your MXO reviews (like the non-functional "Zone" button, etc) ?

@AddOhms 3 ай бұрын

Most of what I addressed has been fixed now. Zone Trigger was enabled a couple of months ago. Finally!

@mozgy 3 ай бұрын

Ever considered espnow instead of wifi ? In my experience batt consumption is quite lower ..

@AddOhms 3 ай бұрын

I haven’t used it yet. But I am planning to do a comparison soon.

@mozgy 3 ай бұрын

@@AddOhms I have over 20 esp8266/esp32 sensors around the house all espnow-ing to one central esp32 and that one does wifi and /metrics for grafana

@laudo6503 3 ай бұрын

Y'all I can't stop laughing at the Moss bit. I've been watching so many electronics videos that now I'm fluent in Engineer humor. I'm in too deep. Help.

@richardbruno201 3 ай бұрын

Where is episode 24?

@AddOhms 3 ай бұрын

DIY Arduino PCB Design in KiCad (Pyramiduino) kzbin.info/www/bejne/o4qbf3hphNqDnK8

@richardbruno201 3 ай бұрын

None of the components that you used had a foot print. Where are the footpritns?

@dd07871 4 ай бұрын

You're spreading solder paste way too fast. Paste datasheet probably mentions 10mm per second max. And no more than two passes, first around 30 degrees to spread paste, and second around 45 degrees to clean off excess.

@AddOhms 4 ай бұрын

The paste I was using had a print speed of 25-100 mm/sec. While I was probably going fast, I was still under 100 mm/sec. The two passes at two different angles-of-attack is not something I have heard before, nor did anyone suggest it in any of the livestreams where I printed paste. So, I'll give that a try next time I do it.

@joseph9915 4 ай бұрын

It is a pity that local PCB manufacturers seem to always be 10 times the price of china. And maybe not much faster delivery.

@k5map 4 ай бұрын

Great educational video... I also use a lot of the Adafruit Feathers and am in the process of designing/building my own Power Feather board to use with my NeoPixel projects (12vDC in, 5vDC out). If you have time and are willing, I would like to collaborate with you offline as I also in the Houston area.

@bald_engineer 4 ай бұрын

Ah. MacroFab is in Houston, I am not. :) A Feather board for NeoPixels sounds useful. If you search for "YULC LED controller," you'll find a recent project I came across for controlling LEDs. It's not in a Feather form factor, but it might give you some ideas.

@k5map 4 ай бұрын

@@bald_engineer Much thanks for the link to the YULC project and I wasn't aware MacroFab is a local company (like this option versus waiting for boards from China)... I'm still a novice at PCB design. Even though we don't live one another, I'd still be interested in a bit of collaboration so I can learn more about part selection/layout/etc. as I have more IoT projects I'd like to build my own PCB

@aquahoodjd 4 ай бұрын

How aboit to add a AI VOC / VSC quad sensor array? You can pick up all volatile chemicals as well as any bacteria bacterial overgrowth and it is a really awesome sensor that can analyze the chemical nature of everything from different types of coffee to the presence of e coli. And other environmental potentially nasties that could be present in a lab like yours. BME688 gas sensor can detect Volatile Organic Compounds (VOCs), volatile sulfur compounds (VSCs) and other gases such as carbon monoxide and hydrogen in the part per billion (ppb) range.

@AddOhms 4 ай бұрын

That’s a good idea. And something like the BME688 is probably the right option. Back when I did the initial design, VOC sensor options were terrible. I was on a short schedule when I brought this project back to life. But I wish I had looked into VOCs again. Guess there will have to be a rev4.

@MAYERMAKES 4 ай бұрын

a project that just makes sense. bald sense , but sense nonetheless

@AddOhms 4 ай бұрын

Someday, I’ll get more creative with my project names. Today is not that day.

@kyhldk 4 ай бұрын

Yeah the Sun is always a problem 😂

@bald_engineer 4 ай бұрын

Since finishing the video, I have deployed 3 more Bald SENSE Wings (and FeatherS3s). Now I have mapped out the time different parts of my garden receive sunlight. And I trying to use temperature to determine when HVAC compressors are running. But, I have another (shaky) idea for that.

@AddOhms 4 ай бұрын

Use this link to upload a project and get an instant quote from MacroFab: bald.ee/macrofab

@Sheppard30 4 ай бұрын

I have a question, why when button is pressed, current does not split on two, so part of it goes to GND and part to the pin?

@AddOhms 4 ай бұрын

A very small amount goes to the pin. The pin’s input resistance is an equivalent of a 1 megaohm resistor to GND. So you have megaohms in parallel with kiloohms.

@d.travis2845 4 ай бұрын

I wish he would have shown the meter settings more clearly. He moved around too fast!

@AddOhms 4 ай бұрын

What meter settings? This video had no meters.

@michaelshakib7777 4 ай бұрын

Best explanation I’ve seen. Thanks

@KausikKumaar 4 ай бұрын

Can the LED die even with the resistor?

@AddOhms 4 ай бұрын

Sure. Everything wears out eventually.

@Ex_Elektronik 5 ай бұрын

You used a high voltage differential probe or?

@AddOhms 5 ай бұрын

Why would I have used a high-voltage probe?

@Ex_Elektronik 5 ай бұрын

@@AddOhms Hallo, ich bedanke mich für Ihre schnelle Antwort, aber ich möchte nur wissen, ob Sie einen Hochspannungstatkopf benutzen haben oder nicht. Ich könnte leider nicht sehen, ob Sie eine getrennte Stromquelle für das Arduino USB-Anschluss genutzt haben. Würden Sie bitte einmal mir erklären, wann man einen Hochspannungstatkopf kann nutzen. Es wäre von Ihnen sehr hilfsbereit und für mich auch nützlich.

@AddOhms 5 ай бұрын

The laptop powering the Uno was not connected to mains.

@robertlove7607 5 ай бұрын

I have a question. At 2:27 , If I were to measure from the resistor side of the switch to ground with multimeter set to measure DC volt, would I read 5 VDC? Second quesion. If the wire leading to the switch were somehow to get grounded, would the input show as on? I.E. same as if the the switch were closed?

@AddOhms 5 ай бұрын

Yes. The voltage drop from the resistor side to ground is 5 volts, which is the point of the pull-up. Since the resistor is connected to effective open, the voltage relative to ground is the same on both of the resistor's terminals. For the second question, a wire connecting from that same point to the ground is exactly the same as the switch being closed.

@clttech3903 5 ай бұрын

One question so is the light flashing in DC?😅

@AddOhms 5 ай бұрын

If it is an LED bulb, yes.

@BehexagusTheGreat 5 ай бұрын

So a car fuse would be DC, right..?

@AddOhms 5 ай бұрын

Almost all of a car’s electrical is DC.

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