For example, a 100kΩ resistor with a 1% tolerance will have a resistance value between 99kΩ and 101kΩ.
A resistor’s tolerance indicates the maximum variation from the theoretical resistance value a resistor will have. In real world, electronic parts are not perfect and can have light deviations from the “ideal” model. For these resistors, the lenght is between 6 mm and 6,5 mm and the distance between pins between 7,5 mm and 8 mm. These are the ones we use in all of our effect pedal kits. For small electronics, 1/4W (0,25W) resistors are the most used. This power value depends mostly on the resistor’s size (the bigger the resistor, the higher the power it can dissipate).
A resistor’s power value sets the maximum amount of energy the resistor can dissipate in the form of heat without getting damaged. When a current flows through a resistor, it gets hotter and starts dissipating energy. In the next section we’ll cover in detail how to read the resistance value of different kind of resistors. In broad terms, when facing the same voltage a resistor with a smaller resistance will allow more current to flow through it, which allows, along with other parts, to design circuits as amplifiers and volume controllers. If you’re just starting building effect pedals and are not very used to the color band code, we recommend you to use a cheat sheet with the color-number equivalence.īefore starting reading resistor values, we’ll explain briefly resistor’s 3 main properties:Ī resistor’s resistance value is its most important property, and it’s written on the body of the resistor with a color band code. Resistor reading speed will keep improving as you practice, to the point you’ll immediately identify them. On the DIY world (“Do It Yourself”), knowing how to read resistor values is essential. Did you get one of our diy effect pedal kits and need help to read resistor values? Then keep reading! This is one of the most important skills to anyone interested into electronics and effect pedal building, and in this post we’ll explain step by step how to read the value of the resistors we send with our effect pedal kits.
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