Add relay driver example sketch

firmware/relays/relays.ino

@@ -0,0 +1,24 @@
+#define RELAY1_PIN 11
+#define RELAY2_PIN 7
+
+void setup() {
+	// initialize serial communications at 9600 bps:
+	Serial.begin(9600);
+
+	pinMode(RELAY1_PIN, OUTPUT);
+	pinMode(RELAY2_PIN, OUTPUT);
+
+	digitalWrite(RELAY1_PIN, LOW);
+	digitalWrite(RELAY2_PIN, LOW);
+}
+
+void loop() {
+	digitalWrite(RELAY1_PIN, HIGH);
+	delay(500);
+	digitalWrite(RELAY2_PIN, HIGH);
+	delay(500);
+	digitalWrite(RELAY1_PIN, LOW);
+	delay(500);
+	digitalWrite(RELAY2_PIN, LOW);
+	delay(500);
+}