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skynettw/arduino-unit-9-2

Created December 24, 2017 16:08
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arduino-unit-9-2
int RELAYpin = 7;
int PHOTOpin = A1;
void setup() {
pinMode(RELAYpin, OUTPUT);
digitalWrite(RELAYpin, LOW);
}
void loop() {
int pr = analogRead(PHOTOpin);
if (pr < 20) {
digitalWrite(RELAYpin, HIGH);
} else {
digitalWrite(RELAYpin, LOW);
}
delay(500);
}
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