Electronics > Beginners

Multimeters and Resistors

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Russ:

--- Quote from: IanB on November 26, 2017, 03:56:01 am ---
--- Quote from: Russ on November 26, 2017, 03:53:22 am ---From my textbook.

--- End quote ---

And?

--- End quote ---

   I attached a color code chart from the textbook.

IanB:

--- Quote from: Russ on November 26, 2017, 04:05:36 am ---I attached a color code chart from the textbook.

--- End quote ---

Of course. And from that chart you can see that a 15k resistor would be brown-green-orange, and that a 5.6 k resistor would be green-blue-red. So if you find resistors with those colors you will know what values they are supposed to be.

Russ:

--- Quote from: IanB on November 26, 2017, 04:18:25 am ---
--- Quote from: Russ on November 26, 2017, 04:05:36 am ---I attached a color code chart from the textbook.

--- End quote ---

Of course. And from that chart you can see that a 15k resistor would be brown-green-orange, and that a 5.6 k resistor would be green-blue-red. So if you find resistors with those colors you will know what values they are supposed to be.

--- End quote ---


   Yes. But I found that an auto-ranging meter makes quick work of deciphering the Resistor values. 👍😁

Russ

Kohlrak:

--- Quote from: The Soulman on November 26, 2017, 01:56:28 am ---Under what light did you read the resistors?
"White" led's aren't white at all just a very poor rgb mix screwing up colors beyond recognition.
Regular light bulbs are much better or try daylight.  :)

--- End quote ---

LED pen light from my tablet's stylus. Trying regular bulbs doesn't produce enough light, and since i'm in the northern hemisphere, sun isn't much help either. Normally those kinds of things aren't a problem, so when i get up later i'll try again using my camera to magnify them so i can see them better.


--- Quote from: IanB on November 26, 2017, 03:23:42 am ---
--- Quote from: Kohlrak on November 26, 2017, 12:27:21 am ---none of the resistors are supposed to have a 5 or 6 as a second digit
--- End quote ---

I doubt that. You are likely to have 15 and 56 in your collection.

--- End quote ---

I'm supposed to have a very specific set of them. But, realistically, we know these sets and kits rarely ever have what they're supposed to, especially if they have tiny colored markings that're hard to see to help us identify what goes where.


--- Quote from: IanB on November 26, 2017, 04:18:25 am ---
--- Quote from: Russ on November 26, 2017, 04:05:36 am ---I attached a color code chart from the textbook.

--- End quote ---

Of course. And from that chart you can see that a 15k resistor would be brown-green-orange, and that a 5.6 k resistor would be green-blue-red. So if you find resistors with those colors you will know what values they are supposed to be.

--- End quote ---

I do believe i've found those exact ones. I mounted them to paper with tape and wrote those values on them.


--- Quote from: Russ on November 26, 2017, 04:23:07 am ---
--- Quote from: IanB on November 26, 2017, 04:18:25 am ---
--- Quote from: Russ on November 26, 2017, 04:05:36 am ---I attached a color code chart from the textbook.

--- End quote ---

Of course. And from that chart you can see that a 15k resistor would be brown-green-orange, and that a 5.6 k resistor would be green-blue-red. So if you find resistors with those colors you will know what values they are supposed to be.

--- End quote ---


   Yes. But I found that an auto-ranging meter makes quick work of deciphering the Resistor values. 👍😁

Russ

--- End quote ---

If and only if you trust your meter, which I didn't.

Russ:

--- Quote from: Kohlrak on November 26, 2017, 02:15:04 pm ---
--- Quote from: The Soulman on November 26, 2017, 01:56:28 am ---Under what light did you read the resistors?
"White" led's aren't white at all just a very poor rgb mix screwing up colors beyond recognition.
Regular light bulbs are much better or try daylight.  :)

--- End quote ---

LED pen light from my tablet's stylus. Trying regular bulbs doesn't produce enough light, and since i'm in the northern hemisphere, sun isn't much help either. Normally those kinds of things aren't a problem, so when i get up later i'll try again using my camera to magnify them so i can see them better.


--- Quote from: IanB on November 26, 2017, 03:23:42 am ---
--- Quote from: Kohlrak on November 26, 2017, 12:27:21 am ---none of the resistors are supposed to have a 5 or 6 as a second digit
--- End quote ---

I doubt that. You are likely to have 15 and 56 in your collection.

--- End quote ---

I'm supposed to have a very specific set of them. But, realistically, we know these sets and kits rarely ever have what they're supposed to, especially if they have tiny colored markings that're hard to see to help us identify what goes where.


--- Quote from: IanB on November 26, 2017, 04:18:25 am ---
--- Quote from: Russ on November 26, 2017, 04:05:36 am ---I attached a color code chart from the textbook.

--- End quote ---

Of course. And from that chart you can see that a 15k resistor would be brown-green-orange, and that a 5.6 k resistor would be green-blue-red. So if you find resistors with those colors you will know what values they are supposed to be.

--- End quote ---

I do believe i've found those exact ones. I mounted them to paper with tape and wrote those values on them.


--- Quote from: Russ on November 26, 2017, 04:23:07 am ---
--- Quote from: IanB on November 26, 2017, 04:18:25 am ---
--- Quote from: Russ on November 26, 2017, 04:05:36 am ---I attached a color code chart from the textbook.

--- End quote ---

Of course. And from that chart you can see that a 15k resistor would be brown-green-orange, and that a 5.6 k resistor would be green-blue-red. So if you find resistors with those colors you will know what values they are supposed to be.

--- End quote ---


   Yes. But I found that an auto-ranging meter makes quick work of deciphering the Resistor values. 👍😁

Russ

--- End quote ---

If and only if you trust your meter, which I didn't.

--- End quote ---

   I eventually bought a quality meter (EEVBLOG/Brymen 235) and it has been dead accurate. I sometimes use a10x loupe when looking at color bands, and it is still difficult to discern colors at times 😬.

Russ

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