Read a knob
Reads the potentiometer on A0 as a number from 0 to 1023.
pot
Input
Potentiometer / analog input (3-pin header)
potAnalog
Why this support circuit is added
Analog input (divider).
Grounded in the catalog and golden patterns (real open-source circuits). Every auto-inserted part comes with a reason.
Support circuit added automatically0
No extra support circuit for this part — only the board rail and the connector are wired.
InterfaceAnalog
- Catalog id
- pot
- Category
- Input
- Protocol
- Analog
- Logic level
- Unrestricted (uses the board rail)
Firmware detection0
No library reveals it — add it from the module checklist in your project.
Examples using this part
Run them in the browser, no login needed.
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Read it as a voltage
Converts the 0–1023 reading into volts and prints that instead.
pot
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Turn a knob into a pitch
Maps the A0 reading straight onto an audible frequency.
buzzerpot
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A different note per key
Reads several inputs and sounds the note belonging to whichever is pressed.
buzzerpot
A knob sets the blink rate
The A0 reading is used directly as the delay, so turning it speeds the blink up.
ledpot
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Turn a reading into brightness
Scales 0–1023 down to 0–255 for analogWrite. This is what map() is for.
pot
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Smooth a jumpy reading
Averages the last ten samples. Every sensor project meets this problem.
pot
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Calibrate a sensor to its own range
Learns the lowest and highest values it sees in the first five seconds, then scales to those.
ledpot
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Draw a bar graph with ten LEDs
The higher the reading, the more LEDs light. The simplest way to see a number.
ledpot
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Light up past a threshold
The LED comes on only when the reading crosses a number you chose. if in its simplest form.
ledpot
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Keep going while a button is held
Stays inside the while-loop for as long as the button is down.
buttonledpot
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Branch on a value
Splits a reading into ranges and does something different in each — tidier than a stack of ifs.
pot
Knob turns a servo
Turn the potentiometer and the servo horn follows it to the same angle.
potservo
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A knob opens and closes a vent
The servo follows the potentiometer; DHT22 humidity goes to the LCD.
dht22lcd1602_i2cpotservo
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Different ways to hold text
Prints each way of constructing a String, one after another.
pot
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Join text together
Adds numbers and text with + to build one sentence.
pot
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Append as you go
Uses += to keep adding to the end of a string.
pot
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Compare strings
Shows what ==, > and < do to text — not the same as with numbers.
pot
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Check how it starts or ends
Tests whether a string begins or ends with something.
pot