Update Arduino_Mk.md

Author: arteknix

UsingArduino/Arduino-Make/Arduino_Mk.md

@@ -9,3 +9,14 @@ Create a folder conataining **one** Arduino-sketck (.ino or .pde)
 You can take the files in Example00.
 
 Type ```make``` , that's it 😃 
+
+For uploading you need **Avrdude**. which is such a cool tool. The documentation is amazing too. 
+
+So just type ```make upload``` , when using usb on the UNO for example. 
+
+>[!TIP]
+> As you are using Arduino, avrdude is installed in the arduino folder along it's configuration file.
+>
+> When we use AVR without Arduino, we will need to check if it is installed
+>
+> ```which avrdude```