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First, refer to the chart in Table 18-1, which illustrates the resistor color code The resistor for this project will have three or four color bands on them The first color band is closest to one end of the resistor body The first color band represents the first digit of the resistor s value, the second color represents the second digit of the resistor value, the third color band represents the resistor s multiplier value, and the fourth band denotes the resistor s tolerance value A silver fourth band denotes a 10% tolerance value, while a gold band represents a 5% tolerance value; no fourth color band denotes a resistor with 20% tolerance Resistors R1, R3, R4 and R5, for example, are 47k ohm types The first color band is yellow, which represents a four (4), while the second color band is violet or seven (7), and the third color band is red denoting a multiplier of (100), so you see (4) (7) times (100) equals 4700 or 47k ohms Identify all of the 47k ohm resistors and place them on the circuit board at their correct location Next, solder these resistors to the circuit board Then follow-up by cutting the excess component leads flush to the edge of the circuit board with your end-cutters Now locate R2 and R6 and install them in their proper locations, then solder them in place on the PC board Remember to trim the excess resistor leads with your end-cutter Next we will move to identifying and installing the capacitors for the project Capacitors are available in two major categories electrolytic and non-electrolytic types Electrolytic capacitors are generally both larger in size and larger in value than non-electrolytic types Electrolytic capacitors have polarity and hence, they will have polarity marking on them to identify

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Table 18-1

Color Band Black Brown Red Orange Yellow Green Blue Violet Gray White Gold Silver No color 1st Digit 0 1 2 3 4 5 6 7 8 9 2nd Digit 0 1 2 3 4 5 6 7 8 9 Multiplier 1 10 100 1,000 (K) 10,000 100,000 1,000,000 (M) 10,000,000 100,000,000 1,000,000,000 01 001 5% 10% 20% 1% 2% 3% 4% Tolerance

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their leads You will usually find a black or white colored band or a plus (+) or minus ( ) marking near one of the capacitor leads; this denotes the polarity You will have to orient an electrolytic capacitor onto the circuit board with respect to the capacitor s polarity When you mount electrolytic capacitors on the circuit board, you will have to refer to both the circuit schematic and the parts layout diagrams in order to install the capacitor properly Failure to install electrolytic capacitors correctly may result in damage to the capacitor itself and perhaps damage to the circuit as well Non-electrolytic capacitors will generally be smaller in value and physical size Sometimes the nonelectrolytic capacitors will have their value printed on them, and at other times the capacitor may be physically very small when a three-digit code is used to identify the capacitor The chart in Table 18-2, helps to identify capacitors based on this code Use the chart to help identify the capacitors You will want to make sure that you install the correct value capacitor into the right location on the circuit board in order for the circuit to work correctly For example, a capacitor marked with (102) denotes a value of 001 F, while a capacitor with a marking of (103) denotes a capacitor value of 01 F Look through the component pile and identify the capacitors and what type they are and then refer to the