SparkFun
Dual-Gang 20K Potentiometer with Rotary Switch
· MPN: COM-29199
This adjustable dual-gang potentiometer gives you two linked variable resistors on a single shaft, making it handy for interfaces where two channels need to ...
This adjustable dual-gang potentiometer gives you two linked variable resistors on a single shaft, making it handy for interfaces where two channels need to move together. Turn the shaft and the resistance changes, so it can be used to create a variable voltage for an analogue input.
Connect VCC to one outer pin, GND to the other, and the centre pin will provide a voltage that varies from 0 to VCC depending on the rotation. Feed that centre pin into an ADC on a microcontroller to read a user-adjustable control.
Dual-gang potentiometers are commonly used for stereo audio volume control and similar applications where matched adjustment across two channels is required. This part also includes a built-in rotary SPST switch, with PC pin termination, board locks and panel-mount hardware style.
Specifications:
- Resistance (Ohms): 20K
- Tolerance: ±20%
- Power (Watts): 0.025W, 1/40W
- Built in Switch: Rotary, SPST
- Number of Turns: 1.0
- Taper: Logarithmic
- Number of Gangs: 2
- Adjustment Type: Side Adjustment
- Rotation: 300°
- Resistive Material: Carbon
- Termination Style: PC Pins, Board Locks
- Actuator Type: Flatted
- Actuator Length: 15mm (0.591")
- Actuator Diameter: 6mm (0.236")
- Bushing Thread: M7 x 0.75
- Mounting Type: Panel Mount
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.
- Thread
- A low-power wireless mesh networking standard designed for smart home and IoT devices. It matters because Thread devices can relay messages through each other, helping build reliable networks for sensors and controllers.
- Tolerance
- Tolerance tells you how far the real resistance value may be from the printed value. A 1% resistor is useful when a circuit needs more predictable behaviour than a looser 5% or 10% part.
Find this product in
Dual-Ganged Potentiometer with Rotary Switch Datasheet
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Supplier page — sparkfun.com
Supplier Description · 499.5 KB · Click any page to view full size
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