JC Technology Resistors

Resistors Reduce the current flowing in a circuit

Resistors Fixed Resistor Nominal Value Nominal Value Tolerance Tolerance Nominal Value = average resistance of resistor Tolerance = accuracy of resistor

Resistors Resistance of Resistor Each coloured band has a value Black Brown 1 Red 2 Orange 3 Yellow 4 Green 5 Blue 6 Violet 7 Grey 8 White 9 1st Digit 2nd Digit 3rd Digit = number of zeros

Resistors Resistance of Resistor 00 1 1 Resistance = 1100Ω = 1.1kΩ Black Brown 1 Red 2 Orange 3 Yellow 4 Green 5 Blue 6 Violet 7 Grey 8 White 9 1st Digit 2nd Digit 3rd Digit = number of zeros 00 1 1 Resistance = 1100Ω = 1.1kΩ

Resistors Resistance of Resistor

82000Ω Resistors Colour Code for a Resistor Grey Red Orange Black Brown 1 Red 2 Orange 3 Yellow 4 Green 5 Blue 6 Violet 7 Grey 8 White 9 82000Ω Grey Red Orange

Resistors Tolerance Colour Code: Orange, orange, brown, gold Resistance = 330Ω Maximum resistance = 330+5% = 346.6Ω Minimum resistance = 330-5% = 313.5Ω Brown ± 1% Red ± 2% Gold ± 5% Silver ± 10% No band ± 20%

Resistors Preferred Values Resistors produced in multiples of 10 E24 Series ± 5% 1.0 1.1 1.2 1.3 1.5 1.6 1.8 2.0 2.2 2.4 2.7 3.0 3.3 3.6 3.9 4.3 4.7 5.1 5.6 6.2 6.8 7.2 8.2 9.1 E12 Series ± 10% 1.0 1.2 1.5 1.8 2.2 2.7 3.3 3.9 4.7 5.6 6.8 8.2

Resistors Resistors in Series Increase the total resistance in a circuit

Resistors Variable Resistor Changes the resistance in a circuit Spindle Variable Resistor wiper Track Terminals Longer track = increased resistance

Resistors Light Dependent Resistor Resistance changes with light levels Symbol

Resistors Light Dependent Resistor Daylight = low resistance Darkness = high resistance

Resistors Thermistor Resistance changes with temperature Symbol

Resistors Thermistor Negative Temperature Coefficient (NTC) Resistance decreases as temperature increases