DC INPUT After AC Phase IN /*
Purpose: to detect zero crossing pulse at
INT0 digital pin 2, which after delay
switches on a triac.
Power output to triac activated by external switch.
*/
#define triacPulse 5
#define SW 4
#define aconLed 12
int val;
void setup() {
pinMode(2, INPUT);
digitalWrite(2, HIGH); // pull up
pinMode(triacPulse, OUTPUT);
pinMode(SW, INPUT);
digitalWrite(SW, HIGH);
pinMode(aconLed, OUTPUT);
digitalWrite(aconLed, LOW);
}
void loop() {
// check for SW closed
if (!digitalRead(SW)) {
// enable power
attachInterrupt(0, acon, FALLING);
// HV indicator on
digitalWrite(aconLed, HIGH);
} // end if
else if (digitalRead(SW)) {
detachInterrupt(0); // disable power
// HV indicator off
digitalWrite(aconLed, LOW);
} // else
} // end loop
// begin AC interrupt routine
// delay() will not work!
void acon()
{
//delayMicroseconds((analogRead(0) * 6) + 1000); // read AD1
delayMicroseconds((600* 6) + 1000); // read AD1
digitalWrite(triacPulse, HIGH);
delayMicroseconds(200);
// delay 200 uSec on output pulse to turn on triac
digitalWrite(triacPulse, LOW);
}
attachInterrupt(1, acon, FALLING);
detachInterrupt(1); // disable power DC INPUT After AC Phase IN
