Power supply for Arduino outdoors

Hi all,

I have been having problems using a Raspberry Pi PSU outside to power an Arduino Uno to close a chicken hut door. When the weather drops cold it stops working.

I could not find the problem until asking on this forum. Problems with Arduino working outside - Project Guidance - Arduino Forum

We want to stick with mains power, the cable has already been run.

Supply wants to be just a little above 5V. When opening the door is drawing 300ma, closing its 100ma. On stand by its just a few ma

Can you please suggest an alternate unit? Found this, but would I have similar problems?

eBay item number: 142750874296

I was thinking about using mains a laptop supply dropping the voltage to 12v for the buck DC-DC unit

Many thanks for your help

Dave

Ebay can't find your number.
Paul

Thanks Paul,

very strange; it just worked for me. is this any better

https://www.ebay.co.uk/itm/6-35V-to-1-35V-DC-DC-Converter-Buck-Boost-Charger-Power-Converter-Module-UK/142750874296?hash=item213c9d7ab8:g:LOAAAOSw5cNYPDPL:rk:1:pf:0

eBay item number:
142750874296

Cheers

dave

That does work for me.

But your fundamental problem is "starting" current for the motor. You have listed the running current, which is ok for what you have. But when the bearings are cold and the lube is stiff, the starting current will be a lot higher.

The converter specs call out 5 amp for some unknown time, but you really need to see a graph of output voltage vs. output current. The regulator may or may not be able to support the chosen voltage at 5 amps.

Paul