ADC2PWM PCB
ADC2PWM
Usage example is replacing a flowmeter with a pressure sensor in a coffee maker.
#include <Arduino.h>
#define PWM_PIN PB1
#define ADC_PIN 1 // PB2
void setup() {
// Set the PWM pin as output
DDRB |= _BV(PWM_PIN);
// Configure Timer/Counter0
TCCR0A = 0x00;
TCCR0A |= _BV(WGM00) | _BV(COM0A0)| _BV(COM0B1);
TCCR0B = 0x00;
TCCR0B |= _BV(CS02); // Set the PWM frequency to 122 Hz
TCNT0 = 0;
OCR0B = 0;
// ADC configuration
ADMUX = _BV(MUX0); // Select ADC input channel 1 (PB2)
ADCSRA = _BV(ADEN) | // Enable ADC
_BV(ADPS2) | // Set prescaler to 64 (125kHz with 8MHz clock)
_BV(ADPS1);
}
void loop() {
// Start ADC conversion
ADCSRA |= _BV(ADSC);
// Wait for conversion to complete
while (ADCSRA & _BV(ADSC));
// Read ADC value (10-bit value)
uint16_t adcValue = ADC;
// Scale ADC value to match OCR1A range (0 to OCR1C)
uint8_t pwmValue = adcValue >> 2;
OCR0B = pwmValue;
}
ADC2PWM PCB
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Please review the designer's notes (e.g., PCB thickness) and select the appropriate options.
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