Welcome to How resistant to use part three. So let's go on to the next slide and continue our journey. Alright, on this slide here we're going to look at five band resistors. On the previous section we looked at the four band, the only real difference between a four and a five band resistor is that we have one more digit. If you looked at the four band we had first significant digit, second digit and multiplier. Over here, we have first digit, second digit, third digit right here.

And then we have our multiplier which is the fourth band And then our tolerance ban here. So really, everything is the same. And we're going to we're going to do this and you'll see, but everything is the same except that we have one more digit in there. All right. Part of the reason for this is if you'll notice that on a five man resistor, the tolerances are tighter. All right, where a four band, my tolerance to a two, five and 10% with a five band, they're point 1%, point two 5% point 5% and 1%.

So the so the value, the published value of the resistor has a smaller window and we'll see that in the next slide too. What I mean by that the other thing I want to mention is when we talked about for band I says the first digit or the first significant digit is arto. All the way to the left, like up here, well on the five ban, it's still Same, but it's a little bit tricky. Even though if we look at my five band here, we'll notice that the space right there is still a little bit wider compared to the other, the other colors bunched up. So when you look at a five band be a little bit careful to find that first digit. It's Yes, it's at the left and look at it.

Another suggestion is, if on a five ban if we look at the tolerances is these four tolerances, as I said, point 1.2 5.5. And point one. If you look at the colors that represent that, so Brown is is point 1% and green is 5%. And blue is point two 5%. And violet is point 1%. All right, so with a five band resistor, you'll say well, that fifth band, which is a tolerance It can only contain one or four colors.

And that would be another hint on making sure that you're reading the colors correctly for the public value. All right. So let's go on and figure out how we how we got the value for this resistor. 237 ohms. Alright, let's see how we get the value here. So my first band is what it looks like it's red.

So red represents what? Two. The second band is orange, that's three. And the third man here, which is violet, that represents seven. All right, what's a multiplier multiplier is black. And I multiplier equals one.

So what do we get? We get first digit second digit multiplier times one, we get 237 ohms. There's my omega sign, just what we got right here. Right there. And what's the tolerance plus a minus 1%. So let's clear the slide.

I'm going to the next slide and show you how we get that. And then what I've done is I've superimposed superimposed a calculator to show you the key strokes on the calculator how I've got that just to show some of the students that need a little bit more help on that type of manipulation with the calculator with the decimal point and so forth. Okay, just going over the sub five band resistor Again down here, kinda capsulize it for you. Okay, the first band is red it's to the second band is orange, it's three. The third band is violet. It's seven.

The multiplier which is the fourth band is one, it's black. So therefore 237 times one is 237. My tolerance is what it is brown plus a minus 1%. Okay, now I'm going to find 1% of 237 down here. Okay, 1% of 237 is 0.01 times 237. So 1% of 237 ohms is 200. three, seven ohms.

So I add that I find my upper limit 237 plus 237 is 239.37 ohms. My lower limit is 237 ohms minus 2.37 ohms. And that's 202 234 dot six, three ohms. So here are my limits right there. My upper limit is 239 dot 37. And my lower limit is 234 dots 63.

Now, what I've done on the next slide, I've gone through the mechanics of a calculator. Okay, I've made a mistake and I'm not. I'm not perfect. You'll see that when I go for the lower limit my calculator, you 234 dots six, three. And on my presentation is 234 dot six, four. It's 234. dots six, three is correct.

It's very insignificant. It's actually 1007 home, which is not a big deal. But if you're following along, and you'll look at that and say, Wow, no, I kind of messed up. I don't really want to redo that. So just when you see the dot six, four, in your mind, it's actually a dot six, three. All right, let's go on.

Okay, we're going to find the tolerance. Now, this resistor. And basically it's a we're going to do it the same way as we did it before with our four band. So right here we have our resistor 237 ohms, plus a minus 1%. The first thing we need to do is we need to convert the 1% to a decimal so What we do is we move the decimal point two places to the left. So the decimal point is really here what my pointer is.

We're going to go one, two, that gives me zero dot 01 decimal. So 1% equals zero dot 01. Now we need to find the 1% of 237. So we're going to use the calculator and just what I have here, 237 times zero dot 01. And again, zero dot 01 is the decimal equivalent of 1%. So now we're going to just go to three, seven, times zero dot 01.

And that equals two dot three, seven. So if I have a resistor that has a value of 237 ohms 1% of that is 202 dot three, seven ohms. Now I need to find the upper limit, the upper limit is, is right here is 237 ohms plus two dot three, seven. So let's just add it. Since we got the two dot three, seven, then we're going to add it plus 237 equals Whoo, That's not right. Let's do let me clear that 237 plus two dot three, seven, equals, there we go.

239 Dot three, seven ohms. That's the upper limit. Now let's clear it again. And we're going to find the lower limit. So we know the value the reason Just as 237 minus 1% this time and in this case, it's two dot three, seven ohms. Two dot three, seven equals 234 64.

So what does that mean and again, at the very end of this, we're going to, we're going to get, we're going to get a meter to measure the own ohmic value of resistance. We're going to show you how to measure it. But let's say I am going to measure this, I would place my meter that would measure the resistance of the resistor. If that meter read an upper limit equal to or less than 239 dot Eight, Seven ohms or your Read 234 dot six, four ohms, which was a lower limit anywhere between the upper limit and the lower limit. That resistor is in spec for 1%. And again, we're getting into how to measure resistors at the very end of this, this lesson.

Okay, let's go on. There's some problems for you to solve right here. The first one is a four band resistor. Band one is red. Band two is red. Band three is orange.

Band four is gold. What's the resistor value? Second question. Band one is green. Band two is brown. Band three is yellow.

Band four silver. What's the value? hit the pause button. Try to do these questions. The answers will be on the next slide. But for you to know how to do them, you need to stop right here and put some thought into them and do them.

That's the only way you're going to learn. Here are the answers. The first one where we've got red, red orange, that is 22,000 ohms or 22 K. My lower limit is 20,900 ohms. And my upper limit is 23,100 ohms. Question number two answers to green brown, yellow, that is 51,000 ohms or 510 K, my lower limit is 459,000 ohms. And my upper limit is 515,100 ohms.

So right there. So if If you haven't done that, go back review the material. Send me an email answer the question, you've got a phone number. I will help you out. Let's go on. Alright, our next batch of questions.

This one has to do with five band resistors. Question one, we've got red, red, orange, red, red, five band resistor. What's the resistor value? Second question. green, brown, yellow, blue, green. What's the resistor value?

Hit the pause button. The answers are on the next slide. Again, try to do them. That's the only way you're gonna learn if you have some rough spots. I don't completely understand something. Or you can prove to yourself that you want to stand this.

Do the problems then go to the answers on the next Slide. Okay Here are the answers. Question one is 22,300 ohms or 22 dot three k ohms. My lower limit is 21,854 ohms 220 2746 ohms question to 514 million ohms or 514 mega ohms my lower limit 511,430,000 ohms lower limit to 516,570,000 ohms right here that's a mouthful right there, by the way, so they Go, there's my answers. And again, if you did not get them review the material, send me an email, you have a phone number. I will try to help you I have someone sent me a question earlier today and I put it on the website.

I answered him and he thanked me for it. And I said, I hope that that helps. So I'm sincere in getting you to understand the material that I present. And I mean that sincerely. I want you to learn from me. That's number one.

All right, let's stop here.