Using External power suppplies with Arduino explained!

So, I'm back to another tutorial! Well, today I'll show how to correctly use external power supply with Arduino!

Is Really simple, You will see:

Power supplies

Well, power supplies are used for every projects with Arduinos, like controlling Leds, Servo motors, Relays and more!

But sometimes, The Arduino can't be a power supply because of the project, like controlling more than 1 servo motor with the only 5v of the Arduino.

This example shows:

So, this example shows that isn't possible to control 5 servo motors with Arduino as power supply, so what's our solution?

The Solution

Yes! The solution is very simple, but you need to take care to not doing anything wrong.

So, our solution is using Batteries as external power supply!

Some external power supply examples images:

Well, there are some examples, but, how to use correctly them?

Check the Schematics!