diff --git a/main.cpp b/main.cpp
new file mode 100644
index 0000000..54faf56
--- /dev/null
+++ b/main.cpp
@@ -0,0 +1,50 @@
+#include <avr/io.h>
+#include <util/delay.h>
+#include <Arduino.h>
+
+#include "digital_in.h"
+#include "digital_out.h"
+
+
+int main() {
+    uint8_t cycle{0};
+    int8_t counter{0};
+    double ratio;
+
+    bool last_lo = false;
+
+    Digital_in encoderA{4};
+    Digital_in encoderB{5};
+    Digital_out led{5};
+
+    encoderA.init();
+    encoderB.init();
+    led.init();
+
+    Serial.begin(9600);
+
+    while (true) {
+        _delay_us(100);
+        led.set_lo();
+
+        bool curr_hi = encoderA.is_hi();
+
+        if (last_lo && curr_hi) {
+            counter += encoderB.is_lo() ? -1 : 1;
+            led.set_hi();
+        }
+        ++cycle;
+
+        if (cycle == 255) {
+            ratio = counter / (0.0255 * 700);
+            counter = 0;
+            cycle = 0;
+            Serial.println(ratio);
+        }
+        
+        last_lo = !curr_hi;
+    }
+
+
+    return 0;
+}