Resistors

• Linear Resistors: They are a type of resistor whose resistence is constant and is predictable when voltage or temperature is applied, when current passes by, it creates a fixed voltage drop meaning that it always uses a certain amount of voltage. Linear resistors come in two forms: fixed and variable.
• Non Linear Resistors: A non-linear resistor is a component that doesn’t behave in a predictable, straight-line way. When the voltage or temperature changes, the current doesn’t follow Ohm’s law. It’s like a door that sometimes opens a little and sometimes opens a lot, even with the same push. Different types exist for special purposes.

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Fórmula de la Ley de Ohm:

R = V / I

Donde: R = Resistencia (Ω), V = Voltaje (V), I = Corriente (A)

1. Rojo – Violeta – Marrón – Dorado 2 (rojo) 7 (violeta) ×10 (marrón) ±5% Resultado: 27 × 10 = 270Ω ±5%

2. Naranja – Naranja – Rojo – Plata 3 (naranja) 3 (naranja) ×100 (rojo) ±10% Resultado: 33 × 100 = 3300Ω ±10%

3.Amarillo – Violeta – Rojo – Dorado 4 7 ×100 ±5% Resultado: 47 × 100 = 4,700Ω (4.7kΩ) ±5%

• It is measured in Ohms (Ω)
• Resistance (Ω): This is how much the resistor opposes the flow of electric current. Think of it like a narrow pipe that slows down water.
• Tolerance (%): This shows how much the actual value may vary from the written value. It’s the allowed error.
• Material type: Carbon, metal film, or wire-wound. This affects accuracy and stability.
• Power Rating (W): This indicates how much power the resistor can safely dissipate as heat without being damaged.

• Current Limiting: Resistors are used to limit the amount of current that flows through a circuit, protecting sensitive components from damage.
• Voltage Division: They can be used in voltage divider circuits to create reference voltages or reduce voltage levels for other components.
• Pull-up/Pull-down Resistors: These resistors are used in digital circuits to ensure that inputs to microcontrollers or logic gates settle at expected logic levels.
• Signal Conditioning: Resistors can be used in filters and attenuators to modify signal characteristics.
• Heat Generation: In some applications, resistors are used to generate heat, such as in heating elements.