Electrical question: Replacing a wall wart?

[jason the filter freak]

Input on if this solution would work or a better less convoluted solution would be greatly appreciated. Thank you.

 

I need to replace the power supply that came with my Duetto ATO. A micro controller + DC pump.

 It's just way too big. It says its 12V and 1amp (it has a 5.5mm/2.1mm barrel plug). 

Can I replace it with this USB adapter plus a step up converter cable? 

If not any other solutions? I can't come across a wall wart any less than 1.2" in depth. 

[Javed Aman]

You could try getting one where the transformer is separate like :

https://www.amazon.com/Adapter-Transformers-Supply-Output-Listed/dp/B00DKSI0S8/ref=sr_1_4?dchild=1&keywords=12v+power+supply+ul+listed&qid=1607216375&sr=8-4

Just get something that is UL listed and at least 1A like you are looking for.