How to read Resistor Color Codes
First the code
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Black is also easy to remember as zero because of the nothingness common to both.
(Please don't add or change the mnemonic - it will only get reverted -admin)
How to read the code
BS 1852 Coding for resistor values
BS 1852(British Standard 1852). The letter R is used for Ohms and K for Kohms M for Megohms and placed where the decimal point would go.
At the end is a letter that represents tolerance Where M=20%, K=10%, J=5%, G=2%, and F=1% D=.5% C=.25 B=.1%
|BS 1852 coding examples|
|5K6G||5.6K ohms 2%|
|33KK||33k Ohms 10%|
|47K3F||47.3 K Ohms 1%|
Common surface mount coding
The third or forth digit is the multiplier
Thus 103 is a 10K resistor
475 is a 4.7M resistor
Measure resistors with Volt Ohm meter.
We now have a program that calculates the minimum error on resistor dividers of up to 4 values.