A 3.3 volt supply generated by the on-board regulator. Supplying voltage via the 5V or 3.3V pins bypasses the regulator, and can damage your board. The board can be supplied with power either from the DC power jack (7 - 12V), the USB connector (5V), or the VIN pin of the board (7-12V). This pin outputs a regulated 5V from the regulator on the board. You can supply voltage through this pin, or, if supplying voltage via the power jack, access it through this pin.ĥV. The input voltage to the board when it’s using an external power source (as opposed to 5 volts from the USB connection or other regulated power source). If using more than 12V, the voltage regulator may overheat and damage the board. If supplied with less than 7V, however, the 5V pin may supply less than five volts and the board may become unstable. The board can operate on an external supply of 6 to 20 volts.
Leads from a battery can be inserted in the GND and Vin pin headers of the POWER connector. The adapter can be connected by plugging a 2.1mm center-positive plug into the board’s power jack. The power source is selected automatically.Įxternal (non-USB) power can come either from an AC-to-DC adapter (wall-wart) or battery. The Mega 2560 can be powered via the USB connection or with an external power supply. Then the question is which 5 V should I use? External or internal from Arduino? I think this should be solved by +Analog being connected in parallel on the shield to either 3.3V on pokeys or 5 volts on Arduino. If I use Pokeys, it wants 3.3V for Potentiometers, while Arduino wants 5 V. What do I do with the rest of the Power Pins? I should connect 7-12 Volts on the VIN pin I think I drew 5 Volt input on all 5 Volts. In this thread I am making a shield for Arduino and/or Pokeys:īut I have started to question my thinking about Power Distribution.
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