billigerfusel right in the feels 💛

Same

billigerfusel

I want to be an electical engineer too. ❤

Same here, i'm near retirement after spending 41 years in electronics trade. Why am i watching this video? Good video for youngsters to learn from. Please stick to battery power until you know what you are doing. Stay safe. @billigerfusel

I agree.

we have a youtube channel that deals with Arduino,ATmega328P,Java,Serial programming ,robotics. So if you like these stuff do Subscribe. Sorry for annoying

The ratio 0f r.ms value the average value of an alternating quantiy is called frim factor .. Rms .value /average value 1m£2 /=€\21M2€m=1.11.

Ashok Dewan Waaaait a second. I am from infosec too and I want to learn about electricity😑

⁷

Woah, you're actually here. Just to let you know, I love it when you explain a 'somewhat complex' circuit using your Keysight. And when you start taking notes and do calculations, that's when I feel somewhat advanced and professional. XD Love your vids, thanks.

GreatScott! You too do great job

Hey scott! I love your videos!

wohooo. hiii

Great Scott!!

this comment made me cry an LED tear..

0:24 "I'm not dead." 0:26 "You soon will be." 0:27 "He's died."

Poor LED was sentenced to the electric chair

Bwahahahahaha!!!

Idaho Made bmwahahah

just check, last video he made was 5yrs ago.

@Badr Ahmed headphones actually... yes

that poor Raspberry Pi...

Well, here's the thing. Voltage and current flow are about voltage differential. You have to imagine that there's someone pushing the electrons at the negative side, but there's also someone pulling them on the positive. No matter what side the resistor is on, the current will flow just the same through the led.

I have the same question! Someone please answer!

@@seanlikestoeat lost all hope, 4 years and still no answer

Think about the current flow in a circuit as a whole - where does the current go OUT of the led in that case? If you connect one leg of the LED to a high current source like a 12v car battery, but leave the other leg disconnected, what happens?

Its all about the push process brah

In this case it does not matter which side the resistor is located in the circuit, so long as it is present. The omitted part of the video does not detail the fact that the entire circuit is in so called "series," meaning that every component is tied end to end with each other. In this format, the current is determined by the circuit voltage divided by the entire circuit's total resistance. The cool part of this setup is that the resistor and LED will both experience the same constant current in amps while having different voltages, since the individual component voltage is current times resistance. The only concern of resistor placement would be if the circuit was so called "series-parallel" where a drop in voltage could cause power problems in other branches of the circuit. Another concern on resistor placement would be purely for safety concerns if you wanted to limit a particular side of the circuit's current that might be exposed to human interaction, say a light switch.

Richard Forester Seriously don't do anything with electricity take up macrame .

You are correct in your thinking but it will resist the flow in the entire length of the circuit, from battery back to the battery.

In this case (since the circuit is in series), the current at any point is the same as the current at another point. What dictates current is the overall resistance. Resistors don't "use up" current in order to save the LED, but instead limits it overall.

Sir, you've made my day.

I don't know about you, bu I always had problems tinning the ends of the carrot. That's why I started using resistors.

A new unit of resistance? The impedance of this circuit is 3 dried out pieces of carrot.

tablatronix 😂

ys, you can add it or slowly sandpaper it to desired resistance

What is seen cannot be unseen...

electricity is amportant

Ohmy God!

NERD JOKES!!

Those jokes make me Hertz!

Actually electrons flow opposite to the flow of negative charge....

Or you would, if the editor hadn't removed the spaces before the 'V'.

I am really amped up when I hear/see puns

@@sushmaverma3562 no u

@@username0004 oh fuck

Ohm y

Constant current buck converters

Which means I shouldn't be using LED strips if I want more than 30% of the energy to go into the LEDS. I don't see how I can connect a constant current buck converter to 16 feet of www.amazon.com/LEDwholesalers-Flexible-300xSMD3528-Adhesive-2026WH/dp/B002Q8V8DM

Why limit that question to resistors? Many discrete components have limits on how much current they can handle. So one simply uses the appropriate resistor. An LED is no different.

Basically, you have a chain of LEDs in series and a small sense resistor at the end, (0.1ohm or so). You know elements in series must have the same current going through them, as part of KCL. You also know that in a resistor, current is directly related to voltage, and more importantly, linearly. What you do is measure the corresponding voltage across a resistor to read the current through the LEDs, then use that as feedback in your buck/boost driver. It's more complicated that that, but that's the gist of it.

+Idjles Erle With LED strips you don't waste 66% in the resistor. Have you ever tried measuring the voltage drop in those resistors? It's typically 2 out of the 12V you run the strip at, so 16% loss in the resistor, which is actually a better efficiency than many of the cheap constant current drivers (for low currents). You can't use a constant current driver for a strip. Such a driver can only drive a single series connection of LEDs, parallel connected ones (exceptions if you know what you're doing), which for a long strip would mean dangerously high voltages.

Porn?

LVB1B. You rather someone shit on your chest?

I thought the same

not really

That's the entire point of the PI, to learn, and breaking it is a form of learning.

no

i calculated it for myself and it was 69,42 petaohms

Same in Finland.

Same in France

uoltage

you guys just trying to be different hahahaha

???..a doubt from India

NE555 yes of course u need!

you are connecting them in parallel to a voltage source so it is the same thing as connecting one. If you connect them to a current source then also its not a good idea as leds don't do current sharing very well. One will take a lot of current first and blow up, then next will do the same and soon you will have 100 burnt leds on your hand.

+Qaz Wsx it depends on if u wanna use just one single resistor for the whole LEDs or a single resistor foe every LEDs. I think his question was if he would use just one single resistor!

You need a Power MOSFET first to control big loads with microcontroller

No, you don't need one, you need one hundred. Unless the LEDs are matched (i. e. have the exact same electrical properties, which is improbable unless you measured them all) and thermally coupled (all stay at the same temperature by mounting them on the same heatsink for example), you must never connect LEDs in parallel without a resistor for each parallel string.

i r 2 stewpid 4 dat

electrodroid ftw xd

"I had to suffer and you should too!" :D

Hey, we can use those resistor things to make a machine to remember for us ;)

Bad Boys rape our young girls but Violet gives willingly. Get some now.

My pleasure!

Hope you passed

Raspi in Africa could've eaten that children.

Toto ate my raspberries.

+Afrotechmods It seems like Mr. Afro is in a good joking mood today XD

we have a youtube channel that deals with Arduino,ATmega328P,Java,Serial programming ,robotics. So if you like these stuff do Subscribe. Sorry for annoying

Edge case, so hard to say. Potentially, fresh battery burns the LEDs out, half-drained battery lights the LEDs fine, aging battery doesn't light them at all. If it works at all, LED brightness will vary with temperature because this affects the forward voltage - not that you'd normally notice, but in an edge case like this, if could be significant. Basically, if the supply voltage is close to the LED voltage, it's very difficult to predict the current, because you don't know either voltage accurately enough. Which is why efficient LED drivers regulate the current rather than the voltage.

Me to

Uh, yes! Er, I mean, no!

Data sheet for the device. Manufacturers have datasheets on their websites, and online distributors like Farnell or Digi-Key will link the data sheet from the product page.

Yup. That's why I made these videos!