Voltage Divider Basics

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Divide voltage with resistors

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DEHI

Emiratos Árabes Unidos

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Voltage Divider BasicsVersión en línea Divide voltage with resistors por DEHI 1 Slide 1: What is a Voltage Divider? A voltage divider is a simple circuit that reduces a supply voltage to a lower, usable level using two or more series resistors. 2 Slide 2: Core Formula For two resistors, Vout = Vin × R2 ÷ (R1 + R2). This determines the output voltage across R2. 3 Slide 3: Circuit Setup Connect R1 and R2 in series. Apply Vin across the series and read Vout across R2. 4 Slide 4: Choosing Resistors Higher resistance minimizes current draw but can increase noise and impedance. Balance R1 and R2 for your load. 5 Slide 5: Load Effect A load connected to Vout changes the divider ratio. The effective resistance becomes parallel with R2, altering Vout. 6 Slide 6: Thevenin View Any divider seen from the output resembles a Thevenin equivalent: a voltage source and an internal resistance. 7 Slide 7: Typical Uses Commonly used for biasing, sensor interfaces, and setting reference levels in circuits. 8 Slide 8: Potentiometers A potentiometer acts as a variable divider, allowing adjustable Vout by turning a knob or slider. 9 Slide 9: Quick Calculation Tip When accuracy matters, check the load. If Rload is small, recalculate with R2 in parallel to get the real Vout. 10 Slide 10: Practice Problem Given Vin=12 V, R1=4 kΩ, R2=6 kΩ. Calculate Vout. Use Vout = Vin × R2/(R1+R2) → 7.2 V.

Voltage Divider BasicsVersión en línea

Divide voltage with resistors

por DEHI

Slide 1: What is a Voltage Divider?

A voltage divider is a simple circuit that reduces a supply voltage to a lower, usable level using two or more series resistors.

Slide 2: Core Formula

For two resistors, Vout = Vin × R2 ÷ (R1 + R2). This determines the output voltage across R2.

Slide 3: Circuit Setup

Connect R1 and R2 in series. Apply Vin across the series and read Vout across R2.

Slide 4: Choosing Resistors

Higher resistance minimizes current draw but can increase noise and impedance. Balance R1 and R2 for your load.

Slide 5: Load Effect

A load connected to Vout changes the divider ratio. The effective resistance becomes parallel with R2, altering Vout.

Slide 6: Thevenin View

Any divider seen from the output resembles a Thevenin equivalent: a voltage source and an internal resistance.

Slide 7: Typical Uses

Commonly used for biasing, sensor interfaces, and setting reference levels in circuits.

Slide 8: Potentiometers

A potentiometer acts as a variable divider, allowing adjustable Vout by turning a knob or slider.

Slide 9: Quick Calculation Tip

When accuracy matters, check the load. If Rload is small, recalculate with R2 in parallel to get the real Vout.

Slide 10: Practice Problem

Given Vin=12 V, R1=4 kΩ, R2=6 kΩ. Calculate Vout. Use Vout = Vin × R2/(R1+R2) → 7.2 V.

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