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10K timmer potentiometer

10K Trimmer Potentiometer (Through Hole)

20k trimmer potentiometer

20K Through Hole Trimmer Potentiometer

50K Potentiometer Panel Mount

50K Potentiometer Panel Mount (Non Trimmer)

Small red knob for potentiometer

Small Knob for Potentiometer - Black with Red Cap

Potentiometer with adjustable knob.

50K Potentiometer Panel Mount (Non Trimmer) With Knob

A 5K Rotary Potentiometer shown with a pencil for scale.

5K Potentiometer - Rotary

Top view of 50k Trimmer variable resistor potentiometer

50K Trimmer Through Hole

330 ohm metal film resistor

330 Ohm Through Hole Resistor

Thumbnail: 10K through hole 1/4 watt resistor

10K Resistor 1/4 watt Through Hole

4.7K ohm resistor

4.7K Ohm Resistor 1/4 watt


On Paper: Understanding Voltage Dividing using Resistors or a Potentiometer

A voltage divider is a way to decrease a voltage to a proportion of the circuit voltage using two resistors or a potentiometer. The proportion of two resistors will create that proportion output of voltage between the resistors (or the wiper in the case of a potentiometer).
The formula for a voltage divider is:

Vout = ( R1/(R1 + R2) ) * Vin

Example: Resistors are the same on both sides.

Vout = ( 100 ohm / (100 ohm + 100 ohm)) * 5v
Vout = (100/200)*5v
Vout = 1/2 * 5V
Vout = 2.5V as expected.

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