Set Digital icon Set Digital — Toggle a digital I/O port between TTL low (0V) and high (3.3V/5V) in ARC; select board and port, simple on/off control-signal only. Try it →

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#1  

Your 3D printer software should let you encrease the size. Just keep track of how much you encreased on part to the next as you print the peices.

But keep in mind it's all sized for the camera, servo and led display, so if you change the overall size those items won't fit correctly.