Define

#define MOSFET1 9
#define MOSFET2 10
#define EnablePower 2 // HV power on switch
#define batteryVoltage 0 // AD0
#define heatSink 1 // AD1
#define batteryGoodInd 12
#define fanOnInd 11
#define HVON 13 // high voltage on blinks
int x = 0; int y = 0; int z = 0;
void setup() {
pinMode(MOSFET1, OUTPUT); // MOSFET 1
pinMode(MOSFET2, OUTPUT); // MOSFET 2
pinMode(EnablePower, INPUT); // N.O. switch
digitalWrite(EnablePower, HIGH); // pull up enabled
pinMode(HVON, OUTPUT);
digitalWrite(HVON, LOW);
pinMode(batteryGoodInd, OUTPUT);
digitalWrite(batteryGoodInd, LOW);
pinMode(fanOnInd, OUTPUT);
digitalWrite(fanOnInd, LOW);
}
void loop() {
y = analogRead(batteryVoltage);
if (y > 150) digitalWrite(batteryGoodInd, LOW);
// battery LED off
else digitalWrite(batteryGoodInd, HIGH);
// battery too low LED on

if (analogRead(heatSink) > 500) digitalWrite(fanOnInd, HIGH);
// cooling fan on
else digitalWrite(fanOnInd, LOW);
// cooling fan off

if ((digitalRead(EnablePower) == 0) && (y > 150)) {
// check for closed enable switch, battery state
SoftStart(); // bring power up slowly
while ((digitalRead(EnablePower) == 0) && (y > 150)) {
digitalWrite(MOSFET1, HIGH); // MOSFET1 on
delayMicroseconds(360);
delay(8); // wait for 8.3 mS
digitalWrite(MOSFET1, LOW); // MOSFET1 off
digitalWrite(MOSFET2, HIGH); // MOSFET2 on
delayMicroseconds(360);
delay(8); // wait for 8.3 mS
digitalWrite(MOSFET2, LOW); // MOSFET2 off
x++;
if (x == 20) { // flash HVON LED
toggle(HVON);
y = analogRead(0);
x=0;
if (analogRead(heatSink) > 500) digitalWrite(fanOnInd, HIGH);
// cooling fan on
else digitalWrite(fanOnInd, LOW);
// cooling fan off
} // end 2nd if
} // end while
} //
} // end loop

void toggle(int pinNum) {
// toggle the state on a pin
int pinState = digitalRead(pinNum);
pinState = !pinState;
digitalWrite(pinNum, pinState);
}
//SoftStart allows power to come up slowly to prevent excessive surges
// time is about 2 seconds

void SoftStart(void) {
int y = 2;
int x = 0;
int z = 6;
while (y < 8) {
digitalWrite(MOSFET1, HIGH); // MOSFET1 on
delayMicroseconds(360);
delay(y); // wait for 8.3 mS
digitalWrite(MOSFET1, LOW); // MOSFET1 off
delay(z);
digitalWrite(MOSFET2, HIGH); // MOSFET2 on
delayMicroseconds(360);
delay(y); // wait for 8.3 mS
digitalWrite(MOSFET2, LOW); // MOSFET2 off
delay(z);
x++;
if (x == 30) {
y = y + 2;
z = z - 2;
x=0;
}
}
}