Auxiliary power

[TomTN]

Hi all,
Im looking to build a fairly basic power amp. I would though like to possibly add some additional passive functionality, most likely with a microcontroller, for things like motorised volume control and input selection.
Is there a common way to tap off a second power source of say 5v to run these elements, without having to run in a secondary USB power cable or something?
Would a step down converter from the power supplies second output work?
I have a 3e board on order (I understand older versions had 12v aux output but not current one), and this basic 48v power supply on order

https://a.aliexpress.com/_ExbD4tV

Thanks all!

 

[voodooless]

You can order a 5V DC/DC. Just make sure it can handle the current you need as well as the input voltage. 48V input will limit your options a bit.

 

[activewire]

Hi all,
Im looking to build a fairly basic power amp. I would though like to possibly add some additional passive functionality, most likely with a microcontroller, for things like motorised volume control and input selection.
Is there a common way to tap off a second power source of say 5v to run these elements, without having to run in a secondary USB power cable or something?
Would a step down converter from the power supplies second output work?
I have a 3e board on order (I understand older versions had 12v aux output but not current one), and this basic 48v power supply on order

https://a.aliexpress.com/_ExbD4tV

Thanks all!

The Rev B version of 3e audio board does include a 12 volt out, you just need to solder the 2 pin header
Post in thread '3e audio TPA3255 260-2-29A Amplifier Review'
https://audiosciencereview.com/foru...260-2-29a-amplifier-review.50208/post-1944367

 

[TomTN]

The Rev B version of 3e audio board does include a 12 volt out, you just need to solder the 2 pin header
Post in thread '3e audio TPA3255 260-2-29A Amplifier Review'
https://audiosciencereview.com/foru...260-2-29a-amplifier-review.50208/post-1944367

Fantastic, I'll have a proper look when it arrives, but sounds like an easy win!