potentiometer.h

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// Compile this header file only once
#ifndef _POT_
#define _POT_
 
// Include appropriate modules
#include <Arduino.h>
 
class Potentiometer
{
protected:
    // Pin to read voltage from
    uint8_t ADC_PIN;                            
    // Range of ADC values determined by resolution (12 bit default)
    const uint16_t ADC_RANGE = 4096;            
    // Voltage source to scale the ADC reading
    const float VOLTAGE_SOURCE = 3.3;           
 
    // Offset to zero the potentiometer
    float voltage_offset;                       
 
    // Voltage to angle conversion
    float VOLTAGE_TO_DEGREES = 60;              
 
public:
    // Setup object
    Potentiometer(uint8_t pin, float offset);   
 
    // Value from ADC reading
    uint16_t adc_value;                         
    
    // Voltage from ADC reading
    float voltage;                              
 
    // Get the position of the potentiometer
    float get_voltage(void);                    
 
    // Get the position of the potentiometer
    float get_angle(void);                      
 
    // Zero the potentiometer
    void zero(void);                            
};
 
#endif // _POT_