Added minimum acceptable speed.

src/main.c

@@ -91,7 +91,15 @@ uint8_t ReadSpeed(void) {
   ADCSRA |= (1 << ADSC); // Start conversion
   while (ADCSRA & (1 << ADSC)) {
   } // Wait for conversion to finish
-  return (uint8_t)(ADC >> 2);
+
+  uint8_t val = (uint8_t)(ADC >> 2);
+
+    //We want to set a minimum acceptable speed.
+    if(val < 32){
+        val = 32;
+    }
+
+  return val;
 }