# HOW TO CALCULATE RESISTOR & CERAMIC CAPACITOR VALUE.

You all must have had a problem while make your projects and searching old pieces of circuits for a particular resistor or a capacitor.

Well , using a multimeter is a good option but  it may not be available to most of us, and using it is a bit complicated and I will be posting it in  my next instructable on it.

Presently, I will tell you the criterion for calculating the resistance and capacitance.(Only in ceramic capacitors as it is mentioned on electrolytic capacitors)
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## Step 1: MOTIVATION

I was making a school project and I needed some resistors and capacitors, as the local electronics shop is about 20km from my house saw I started to look in the old circuit boards I have.

As I didn't have a multimeter so I tried to understand the logic behind the codes.

Which I will be telling you.

## Step 2: THE RESISTOR

First, of all I would Like to start off with a few basics.
For those of you who don't know what is a resistor, it is device that resists the flow of current.

The colour code is just, the resistance in the forms of  coloured strips.
The colours include-

1. BLACK
2. BROWN
3. RED
4. ORANGE
5. YELLOW
6  GREEN
7 .BLUE
8. VIOLET
9. GREY
10.WHITE

Now, the first two strips of the resistor represent the digit and the third is the multipier band .
And the fourth band gives the tolerance.

The image is from  --http://www.doctronics.co.uk/resistor.htm

Lorddrake1 year ago
just trying to understand ... I think there are a few discrepancies

under calculating resistance .. is the first band color supposed to be green instead of yellow?

is it a supposed to be red band to get 5700 or an orange band to get 57000?
waldosan2 years ago
funny story: i once spent an entire night looking through my resisters to find a few 10k ohm resistors, I started at 9 pm and it wasn't until 2 that i realized i was reading the code backwards!
1 year ago
Aha!Thats why I use my multimeter instead of decoding.
raikut2 years ago
Well the picture that you have given in Step one. Is that a circuit board that you have made. If yes i would like to see its schematics.
pranjal12 (author)  raikut2 years ago
Well I took it from google just to explain you.
You can find it on google images.
Zakery2 years ago
Thanks a ton, This will come in handy for me.