I have therefore sealed the 5V pin so that this never can happen. The 5V pin on the connector also creates a risk of accidental connecting it to a SAMD21G pin. ![]() This risk is reduced if the external electronics also has a supply voltage of just 3.3V. The SAMD21G will be blown up when connecting voltages higher than 3.3V to the pins. The Arduino Zero works at 3.3V instead of 5V. ![]() It has no EDBG and can be programmed by the native USB port. Note that it has no EDBG like the M0 Pro. Note that, by mistake, the digital pins 2 and 4 are swapped. This board is very similar to the Arduino Zero. Official Arduino boards with the SAMD21G Arduino ZeroĬontains the Embedded Debug hardware (EDBG)
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