SparkFun
Rotary Potentiometer - 100k Ohm, Logarithmic (Panel Mount)
A panel-mount rotary potentiometer with a 100 kΩ logarithmic taper. Turn the knob and the resistance changes smoothly — ideal for volume controls and other a...
A panel-mount rotary potentiometer with a 100 kΩ logarithmic taper. Turn the knob and the resistance changes smoothly — ideal for volume controls and other audio applications where a logarithmic response matches human perception.
Connect VCC to one outer pin, GND to the other, and the centre pin outputs a variable voltage from 0 to VCC based on the knob position. Hook it up to an ADC on your microcontroller for easy analogue input.
Specifications
- Resistance – 100 kΩ
- Taper – Logarithmic (audio)
- Shaft – ¼″ metal knurled
- Terminals – PC pin
- Detents – None
- Mounting – Panel mount
Ideal For
- Volume and tone controls
- Audio projects and synthesisers
- Variable input for microcontroller projects
- Panel-mount user interfaces
Jargon buster
Plain-language definitions for the technical terms used above.
- ADC
- An analogue-to-digital converter reads a changing voltage and turns it into a number the microcontroller can use. It matters when connecting analogue sensors such as light, sound, or variable-resistor sensors.
- microcontroller
- A microcontroller is a small computer on a chip that runs your program and controls connected inputs and outputs. For this product, it is the part that reads buttons and sensors, drives the display and speaker, and communicates over Bluetooth.
- potentiometer
- A variable resistor usually turned with a knob or shaft to create an adjustable electrical signal. It is often used for inputs such as volume, brightness or position, so it helps beginners learn how a microcontroller reads changing values.
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Sensors & Input
PDB18 Potentiometer Datasheet
Datasheet · 577.8 KB · Click any page to view full size
Supplier page — sparkfun.com
Supplier Description · 423.5 KB · Click any page to view full size
Related Tutorials
Free guides on learn.littlebird.com.au
