Instructions

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4. RESISTORS
In this set there are three dierent resistors 220 Ω, 1 kΩ and 10 kΩ. On re-
sistors there is a colour coding which can be used to calculate or detect
the resistance if it cannot be measured with a multimeter.
In this chapter you will learn how to calculate this resistance in order to
better perform the following lessons, because you need to be able to
identify the dierent resistances in order to correctly reproduce the set-
ups.
First you have to measure the number of rings on the resistor, because
resistors can have four or five rings. In this set, the resistors have 5 rings,
which give you a more accurate indication of the resistance value than
with 4 rings.
Now you have to determine which ring is the first one. This first ring can
be identified by the fact that it is further away from the end of the body
than the last ring.
You can now calculate the resistance value with a formula. If there are 5
rings, the first 3 rings serve as resistance counters and the fourth as
multiplier, which calculates the total resistance value. The fih ring is the
tolerance ring, which calculates the deviation of resistance value. With
four rings, the third ring is omitted as a resistance counter and then
serves as a multiplier. The fourth ring is then the tolerance ring.
The rings have a specific colour code, where each colour has a
has a certain value. In the following, you see the colour table for 5 rings:
1. Ring 2.Ring 3. Ring 4. Ring
(Multiplier)
5. Ring
(Tolerance)
Ring colour
Black 0 0 0 - -
Brown 1 1 1 x 10 1 %
Red 2 2 2 x 100 2%
Orange 3 3 3 x 1.000 -
Yellow 4 4 4 x 10.000 -
Green 5 5 5 x 100.000 0,5 %
Blue 6 6 6 x 1.000.000 0,25 %
Purple 7 7 7 x 10.000.000 0,1 %
Grey 8 8 8 - -
White 9 9 9 - -
Gold - - - x 0,1 5 %
Silver - - - x 0,01 10 %