Hi
I have an arduino with a gprs module installed. Everything works fine, I'm able to interact with the board with my smartphone.
Now I want to power up a device which is normally powered with 2 1.5V batteries. I thin I have to remove the batteries and solder two wires from my board to the device, but my question is: from which arduino pins? Do i have to use a resistor or any other components?
Thank you very much
What Arduino board are you using? Most have a regulated 3.3V supply; specific amperage available from that supply varies by board.
The reference documents for the various Arduino boards (linked under "Hardware" from the main site) should report the specs of the power available.
Hi
ok, I know that. I'm using an Arduino UNO, but I do not want to power it with an external supply, but I want to power up an external device with the arduino board. I need to know how to link the cable from the arduino board to the external device, not the other way.
Thank you very much