Powering the Nano and Mini Pro

Other Hardware General Electronics
1

Hi guys,
I need a really small power supply for Nano and Pro Mini because I need to enclose everything in a very small case.
Do you thing that something like the 2 down here could be ok? I just need to power the board plus a 5V relay.

http://it.aliexpress.com/item/5V-600mA-3W-AC-DC-Isolated-Power-Buck-Converter-AC-220V-to-DC-5V-Step-Down/32536022737.html?ws_ab_test=searchweb201556_6_79_78_77_80_61,searchweb201644_5,searchweb201560_10

or

http://it.aliexpress.com/item/5V-600mA-3W-AC-DC-Isolated-Power-with-Box-Buck-Converter-Constant-Power/32537651966.html?ws_ab_test=searchweb201556_6_79_78_77_80_61,searchweb201644_5,searchweb201560_10

or maybe I'll just disassemble this:
http://it.aliexpress.com/item/5V-1A-EU-AC-Travel-USB-Wall-Charger-for-iPhone-5-4-4S-for-Samsung-Galaxy/32244607195.html?ws_ab_test=searchweb201556_6_79_78_77_80,searchweb201644_5,searchweb201560_10

Thanks,
Andrea

2

Yeay, you're fine (as long as the relay isn't some kind of big ass relay...) I use USB chargers all the time :slight_smile: Only don't connect it to the RAW pin but to the 5V pin.

3

septillion:
Only don't connect it to the RAW pin but to the 5V pin.

Why that?

4

Because USB power packs produce 5 V, so you need to feed that to the 5 V "VCC" pin on the Arduino.

5

But if I use the other power supply which I'm unsure about the stability of its output, isn't better to put it in the raw pin?

6

Yes, as long as it is at least 7 V, and not more than 12.

7

Oh, got it.
This for the nano and the pro mini?

8

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