Can I power Nano via 9v through vin pin?

Other Hardware General Electronics
1

Hi guys,
I am working on a project and just wanted to ask if my Arduino Nano Clone can be powered by 9v or 7.2v through the Vin pin, or it would burn my board. Till now I have been using the USB power with a 5v 1A Power Bank
and now i need to power it externally without USB. I juat want make a home a home automation system with HC-05, Arduino Nano and Relay.

Regards,
TechDroidROOT

2

You can power through the Vin pin because it goes to the regulator input.

3

Can I power it even with 9v? and what is a regulator input?

4

TechDroidROOT:
Can I power it even with 9v? and what is a regulator input?

Arduino has a built-in voltage regulator.

You really should have checked the documentation page https://store.arduino.cc/usa/arduino-nano

The Arduino Nano can be powered via the Mini-B USB connection, 6-20V unregulated external power supply (pin 30), or 5V regulated external power supply (pin 27). The power source is automatically selected to the highest voltage source.

5

Means I can power it via 9v

6

TechDroidROOT:
Means I can power it via 9v

Yes normally 9V is between the limits of 6-20V

7

OP mentioned a relay ??
If that is powered from the 5volt pin, then there are voltage limits.

OP, post a diagram and links to the parts you are going to use, so we don't have to guess.
Leo..

8

20V on the Nano regulator will likely cook it.
http://www.ti.com/lit/ds/symlink/ua78m.pdf UA78M05
The SOT223 package doesn't have sufficient cooling on the board to dissipate ((20V - 5V) * current drawn) of heat.

9

I am using this realy-
here

will arduino nano be sufficient for 5v?

10

A Nano can control many relays, but can only power ONE relay when the Nano is powered with 7.2 or 9volt on V-in (raw).
Why battery power. The four relays alone could draw >=300mA.
Can't you power the Nano+relays with e.g. a 5volt cellphone charger?
Leo..