การสร้าง Pure Sine Inverter// Arduino code Pure Sine Wave Inverter int i=0; int x=0; int OK=0; float sinPWM[]={1,2,5,7,10,12,15,17,19,22,24,27,30,32,34,37,39,42, 44,47,49,52,54,57,59,61,64,66,69,71,73,76,78,80,83,85,88,90,92,94,97,99, 101,103,106,108,110,113,115,117,119,121,124,126,128,130,132,134,136,138,140,142,144,146, 148,150,152,154,156,158,160,162,164,166,168,169,171,173,175,177,178,180,182,184,185,187,188,190,192,193, 195,196,198,199,201,202,204,205,207,208,209,211,212,213,215,216,217,219,220,221,222,223,224,225,226,227, 228,229,230,231,232,233,234,235,236,237,237,238,239,240,240,241,242,242,243,243,244,244,245,245,246,246, 247,247,247,248,248,248,248,249,249,249,249,249,255,255,255,255,249,249,249,249,249,248, 248,248,248,247,247,247,246,246,245,245,244,244,243,243,242,242,241,240,240,239,238,237,237,236,235,234, 233,232,231,230,229,228,227,226,225,224,223,222,221,220,219,217,216,215,213,212,211,209,208,207,205,204, 202,201,199,198,196,195,193,192,190,188,187,185,184,182,180,178,177,175,173,171,169,168,166,164,162,160, 158,156,154,152,150,148,146,144,142,140,138,136,134,132,130,128,126,124,121,119,117,115,113,110,108,106, 103,101,99,97,94,92,90,88,85,83,80,78,76,73,71,69,66,64,61,59,57,54,52,49,47,44,42,39,37,34,32,30, 27,24,22,19,17,15,12,10,7,5,2,1}; void setup() { Serial.begin(9600); pinMode(5, OUTPUT); pinMode(6,OUTPUT); cli();// stop interrupts TCCR0A=0;//reset the value TCCR0B=0;//reset the value TCNT0=0;//reset the value //0b allow me to write bits in binary TCCR0A=0b10100001;//phase correct pwm mode TCCR0B=0b00000001; //no prescaler TCCR1A=0;//reset the value TCCR1B=0;//reset the value TCNT1=0;//reset the value OCR1A=509;// compare match value TCCR1B=0b00001001; //WGM12 bit is 1 and no prescaler TIMSK1 |=(1 << OCIE1A);// enable interrupts sei();//stop interrupts } ISR(TIMER1_COMPA_vect){// interrupt when timer 1 match with OCR1A value if(i>313 && OK==0){// final value from vector for pin 6 i=0;// go to first value of vector OK=1;//enable pin 5 } if(i>313 && OK==1){// final value from vector for pin 5 i=0;//go to firs value of vector OK=0;//enable pin 6 } x=sinPWM[i];// x take the value from vector corresponding to position i(i is zero indexed) i=i+1;// go to the next position if(OK==0){ OCR0B=0;//make pin 5 0 OCR0A=128;//enable pin 6 to corresponding duty cycle } if(OK==1){ OCR0A=0;//make pin 6 0 OCR0B=128;//enable pin 5 to corresponding duty cycle } } void loop() { }