I inserted a new version of PCB and Schema (v0.4). Who knows Arduino know that every time you connect the USB Arduino resets and you have to reprogram it. To avoid this in version 0.3 of the PCB, I introduced a 120 Ohm resistance that prevents autoreset. Unfortunately this makes it difficult to re-program Arduino, so I added this change:
In this way you can use the switches. When contact A is closed, Arduino is not automatically reset, when open, just disconnect and reconnect the USB cable to update the firmware. If you have problems you can also close B and force a reset.
