Power Supply
Power Supply
As a power supply 3.3V, 5V stabilized can be used or 7-12V if the second regulator is soldered. Also these voltages can be supplied over the PIN-boards from addons, which often has higher power drain than the processor. Care should be taken considering supplying addon boards over this board, since the regulators can be to weak and a voltage breakdown can reset the board.
The diode D1 is to protect against wrong polarity on input, but also can be bridged, so the input voltage can be 0.6V lower. LED1 shows if cpu has power.