user29047: I have made a home automation Arduino project using an HC-05 Bluetooth module. I want to power my Arduino from the main AC supply. Can I use a mobile charger/adapter to power it? Or should I buy a 12v adapter, and solder it to a barrel connector that fits the Arduino input?

user29436: Yes you can use any options that you have mentioned in your question. One can say your question is your answer.

user30005: 
Can I use a mobile charger/adapter to power it?

The answer is almost yes: I use a phone charger myself.
Two reasons that it may not work out:

There are lots of unsafe, non-isolated, cheap phone chargers out there. Stay away from them. Use a brand name one that came with your phone.
Try to stay away from the QC2.0 or QC3.0. they are intelligent and negotiate the output voltage on the phone, up to 9 or 12v. They are compatible with non smart load but you don't want to run the risk.


user29796: Yes, you can. Both options are valid.

29047: <p>I have made a home automation Arduino project using an HC-05 Bluetooth module. I want to power my Arduino from the main AC supply. Can I use a mobile charger/adapter to power it? Or should I buy a 12v adapter, and solder it to a barrel connector that fits the Arduino input?</p>
 29436: <p>Yes you can use any options that you have mentioned in your question. One can say your question is your answer.</p>
 30005: <blockquote>
  <p>Can I use a mobile charger/adapter to power it?</p>
</blockquote>

<p>The answer is almost yes: I use a phone charger myself.</p>

<p>Two reasons that it may not work out:</p>

<ol>
<li><p>There are lots of unsafe, non-isolated, cheap phone chargers out there. Stay away from them. Use a brand name one that came with your phone.</p></li>
<li><p>Try to stay away from the QC2.0 or QC3.0. they are intelligent and negotiate the output voltage on the phone, up to 9 or 12v. They are compatible with non smart load but you don't want to run the risk.</p></li>
</ol>
 29796: <p>Yes, you can. Both options are valid.</p>
