First you are going to want to gather all the materials necessary to build this circuit. If this is the first or one of the first circuit you will be building, it may be a good idea to purchase either a kit or some starter packs that include an assortment of parts. FutureLEC provides very reasonably priced packs of different components. Everything used in this Instructable is available in one of the value packs from FutureLEC. Any local Radioshack should carry everything required in this Instructable as well.
FUTURLEC Value packs
4.7k Ohm Resistor
100k Trim Potentiometer
330 Ohm Resistor
10 Microfarad Electrolytic Capacitor
.1 Microfarad Ceramic Capacitor
Reading Resistor Values
Many times, you will receive resistors in a large pack that contains resistors of varying level of resistance. Resistor values are written on the resistor by means of color bands. Being able to read the values from these color bands is essential for any circuit. The color band code works as follows.
The first band represents the first digit in the value of the resistor (e.g. If the first band color is orange, the first figure is a 3).
The second band represents the second digit in the value of the resistor (e.g. If the second band color is orange, the second figure is a 3)
The third band represents the multiplier for the value of the resistor (e.g. If the third band color is red, then the multiplier is 100.
The fourth band represents the tolerance (how close the actual resistance of the resistor is to the claimed resistance given by the color bands) of the resistor (e.g. if the 4th band is silver, then the tolerance is + or - 10%)
Resistor with the following color bands:
1st Band - Orange
2nd Band - Orange
3rd Band - Red
4th Band - Silver
=33 * (100) = 3300 ohms + or - 10% (Actual value could be anywhere from 3000 to 3660 ohms).