Leonardo and MakeBlock XY Plotter V2

Since there is a lot of confusion in the MakeBlock documents about how to connect up ports to the microservo I'd like to test loading the program to the Leonardo without connecting the ports. I'd hate to blow up something because of crossed wires...!

Then I'd slowly study the sources, connect up and test a bit at a time.

So my question is: I can do no harm by loading up the Leonardo and testing the program loads even though motors, servos and micro switches are not (yet) connected?

Uploading and running a program with nothing connected the the I/O pins will not cause damage.

Running ProgramB when the Arduino is wired up for ProgramA could cause damage.

Note that an Arduino program starts running the instant the upload completes.

...R

Robin2: Running ProgramB when the Arduino is wired up for ProgramA could cause damage.

Thanks for the reply. I hope MakeBlock have all their stuff up to date, there are so many versions and different circuit diagrams...