54 lines
1.7 KiB
Arduino
54 lines
1.7 KiB
Arduino
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/*
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Analog input, analog output, serial output
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Reads an analog input pin, maps the result to a range from 0 to 255 and uses
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the result to set the pulse width modulation (PWM) of an output pin.
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Also prints the results to the Serial Monitor.
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The circuit:
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- potentiometer connected to analog pin 0.
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Center pin of the potentiometer goes to the analog pin.
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side pins of the potentiometer go to +5V and ground
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- LED connected from digital pin 9 to ground through 220 ohm resistor
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created 29 Dec. 2008
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modified 9 Apr 2012
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by Tom Igoe
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This example code is in the public domain.
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https://www.arduino.cc/en/Tutorial/BuiltInExamples/AnalogInOutSerial
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*/
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// These constants won't change. They're used to give names to the pins used:
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const int analogInPin = A0; // Analog input pin that the potentiometer is attached to
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const int analogOutPin = 9; // Analog output pin that the LED is attached to
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int sensorValue = 0; // value read from the pot
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float outputValue = 0; // value output to the PWM (analog out)
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void setup() {
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// initialize serial communications at 9600 bps:
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Serial.begin(9600);
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}
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void loop() {
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// read the analog in value:
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sensorValue = analogRead(analogInPin);
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// map it to the range of the analog out:
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float adjusted = 0.098 * sensorValue - 16.56 + 3.58;
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outputValue = 0.98 * outputValue + 0.02 * adjusted;
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// print the results to the Serial Monitor:
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//Serial.print("sensor = ");
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//Serial.print(sensorValue);
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//Serial.print("\t output = ");
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Serial.print(outputValue);
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Serial.println(" PSI");
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// wait 2 milliseconds before the next loop for the analog-to-digital
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// converter to settle after the last reading:
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delay(50);
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}
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