Is there a place on the LCD board to pull ~2.5-3W at up to 24Vdc source for a aux powered USB port?
 
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Is there a place on the LCD board to pull ~2.5-3W at up to 24Vdc source for a aux powered USB port?  

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david.f31
(@david-f31)
New Member
Is there a place on the LCD board to pull ~2.5-3W at up to 24Vdc source for a aux powered USB port?

Would like to add a clean USB port for a quick and easily removable "floppy blade" USB cool down fan for the build plate.

Is there a acceptable place on the LCD board to pull a "small" amount of power, and run a small step down USB supply board?

Of course I can pull it from the PS, interested in running it from the LCD board if there is enough overhead avalible specifically there, and no one says NO from understanding the request.

Can I use header P1 or P2 as a source to pull ~3W max?
They both appear to have a 5Vdc supply to source from.

The fan is a dc motor, a inductive device, will that be a issue?

Schematic:
https://github.com/ultimachine/Einsy-Rambo/blob/1.1a/board/Project%20Outputs/Schematic%20Prints_Einsy%20Rambo_1.1a.PDF

Posted : 11/09/2018 5:15 am
thrawn86
(@thrawn86)
Honorable Member
Re: Is there a place on the LCD board to pull ~2.5-3W at up to 24Vdc source for a aux powered USB port?

those ribbon cables are so finicky sensitive to interference, I personally would not. The LCDs aren't much better, static has fried two of mine so far.

running a buck converter off the 24v einsy input is 1000x a better option. I use one to power my pi.

Posted : 12/09/2018 11:14 pm
jweaver
(@jweaver)
Honorable Member
Re: Is there a place on the LCD board to pull ~2.5-3W at up to 24Vdc source for a aux powered USB port?


those ribbon cables are so finicky sensitive to interference, I personally would not. The LCDs aren't much better, static has fried two of mine so far.

running a buck converter off the 24v einsy input is 1000x a better option. I use one to power my pi.

I was hoping someone would write something like this..

So you just tap onto the screw termiinals on the Einsy? What do you do if you want to turn the printer off? Do,you have to shut the pi down first?

Posted : 12/09/2018 11:20 pm
toaf
 toaf
(@toaf)
Noble Member
Re: Is there a place on the LCD board to pull ~2.5-3W at up to 24Vdc source for a aux powered USB port?

did they really run 24volt in the ribbon cable? never a good Idea.

I have a Prusa,therefore I research.

Posted : 12/09/2018 11:30 pm
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