How to run Arduino without computer

Projects General Guidance
1

Hi, I'm new to Arduino and I have a pretty simple question.

After I download my code onto my Arduino, can I diconnect the computer and will it still run? Every time I disconnect my computer while my Arduino is running, it immediately stops. How can I solve this problem?

Thanks!

2

How you power your Arduino?
Did you use serial code?

3

So far I've only been running my Arduino while it was connected to the computer, so the power has been coming from the computer. And no, I don't use serial code.

4

If you need to run Arduino without computer than you need external power supply, like battery or AC to 9VDC adapter.

http://playground.arduino.cc/Learning/WhatAdapter

5

If you power up an Arduino it will start running the last sketch that was loaded into it. It saves the program in its non volition memory.

1 Like
6

sach:
So far I've only been running my Arduino while it was connected to the computer, so the power has been coming from the computer.

Well then, no power, no Arduino operation!

7

sach:
After I download my code onto my Arduino, can I diconnect the computer and will it still run? Every time I disconnect my computer while my Arduino is running, it immediately stops. How can I solve this problem?

You have to provide electric power to the Arduino board.

Two possibilities are:

  1. Use a 5V USB charger and connect using an USB cable to the Arduino board.

  2. Use a 7.5V to 9V DC power adapter and connect with external power jack.

8

Or 5V DC adapter connected to 5v/Gnd on the power header.