You can not select more than 25 topics
Topics must start with a letter or number, can include dashes ('-') and can be up to 35 characters long.
53 lines
1.7 KiB
53 lines
1.7 KiB
/* |
|
Analog input, analog output, serial output |
|
|
|
Reads an analog input pin, maps the result to a range from 0 to 255 and uses |
|
the result to set the pulse width modulation (PWM) of an output pin. |
|
Also prints the results to the Serial Monitor. |
|
|
|
The circuit: |
|
- potentiometer connected to analog pin 0. |
|
Center pin of the potentiometer goes to the analog pin. |
|
side pins of the potentiometer go to +5V and ground |
|
- LED connected from digital pin 9 to ground through 220 ohm resistor |
|
|
|
created 29 Dec. 2008 |
|
modified 9 Apr 2012 |
|
by Tom Igoe |
|
|
|
This example code is in the public domain. |
|
|
|
https://www.arduino.cc/en/Tutorial/BuiltInExamples/AnalogInOutSerial |
|
*/ |
|
|
|
// These constants won't change. They're used to give names to the pins used: |
|
const int analogInPin = A0; // Analog input pin that the potentiometer is attached to |
|
const int analogOutPin = 9; // Analog output pin that the LED is attached to |
|
|
|
int sensorValue = 0; // value read from the pot |
|
float outputValue = 0; // value output to the PWM (analog out) |
|
|
|
void setup() { |
|
// initialize serial communications at 9600 bps: |
|
Serial.begin(9600); |
|
} |
|
|
|
void loop() { |
|
// read the analog in value: |
|
sensorValue = analogRead(analogInPin); |
|
// map it to the range of the analog out: |
|
float adjusted = 0.098 * sensorValue - 16.56 + 3.58; |
|
|
|
outputValue = 0.98 * outputValue + 0.02 * adjusted; |
|
|
|
// print the results to the Serial Monitor: |
|
//Serial.print("sensor = "); |
|
//Serial.print(sensorValue); |
|
//Serial.print("\t output = "); |
|
Serial.print(outputValue); |
|
Serial.println(" PSI"); |
|
|
|
// wait 2 milliseconds before the next loop for the analog-to-digital |
|
// converter to settle after the last reading: |
|
delay(50); |
|
}
|
|
|