Operation Manual

To read the example resistor, first take the two resistance bands starting from the left: these are coloured red and red. Red, on
the table included in Figure 12-1, equates to the value 2, so the initial reading is 22. The next band is green, which is the multiplier
and equates to 105 or 100,000 (10 followed by five zeros). Multiplying 22 by 100,000 equals 2,200,000, which is the
resistance value in ohms: 2,200,000 Ω.
There are 1,000 ohms in a kiloohm, and 1,000 kiloohms in a megaohm. Thus, 2,200,000 Ω would typically be written as 2,2
MΩ. The final band, located on the right side of the resistor, is gold and details the tolerance, or accuracy, of the resistor, which
is plus or minus 5 percent in the example shown in Figure 12-1.
There are also five-band resistors. You read these in the same way as a four-band resistor, except that the first three bands offer
resistance figures, the fourth the multiplier, and the fifth the resistance.
Sourcing Components
If you haven’t dabbled in electronics before, it can be difficult to find components and tools. Thankfully, there are plenty of online
and offline sources that specialise in the hard-to-find components you might need to complete your project.
Online Sources