1. Resistors Communication Systems

2. Reading the color stripes n Color stripes are printed at one end of the insulating body, which is usually tan. n Reading from left to right, the first band close to the edge gives the first digit in the numerical value of R.

3. Cont. n The next band marks the second digit. n The third band is the multiplier, which gives the number of zeros after the two digits.

4. Resistors under 10 ohms n for these values the third stripe is either gold or silver, indicating a fractional decimal multiplier.

5. Cont. n Gold = 0.1 & Silver = 0.01 n ***This is only when the gold or silver colors are used as the third stripe. They are more often used as the forth stripe.

6. Resistor Tolerance n The amount the actual resistor can differ from the given code is called the tolerance, usually given in percent. n Gold stripe +/- 5%, Silver stripe +/- 10%. n This is the amount above or below the coded value.

7. Cont. n Ex. 10% of 2000 = 200, therefor 2000ohm with silver stripe can actually be between n 1800 and2200ohm. n If there is no fourth band the tolerance is +/- n If there is no fourth band the tolerance is +/- 20%.

8. Closure: n I. Give the color code for 4. n 2. What tolerance does a silver stripe have? n 3. Give the multiplier for red in the third stripe. n n 4. Yellow, violet, brown, gold