Hi, Does anyone know if it's possible to use this positive voltage regulator on

Controllers Smoothie
,
1

Hi,
Does anyone know if it’s possible to use this positive voltage regulator on the smoothieboard and/or the lcd shield?
Thanks.

34fd8d60b9f564c16d6ddcf7c6ad4511.jpeg
34fd8d60b9f564c16d6ddcf7c6ad4511.jpeg1920×2560 284 KB

2

I’ve just checked both datasheets and i think you can use it.
Maybe you have a lot of heat output and a heatsink is required.

http://www.recom-international.com/pdf/Innoline/R-78xx-1.0.pdf
https://www.sparkfun.com/datasheets/Components/LM7805.pdf

3

it will get extremely hot if you put it on smoothieboard, that’s why we suggest the switching one instead.

4

Ah ok thanks a lot for the info! I don’t really need it I have a 5v supply anyway I just want to populate the board and break out all the pins straight up so I don’t have to go back later and solder stuff in once it’s being used. Out of curiosity is there any advantage or disadvantage to having the regulator on there if you have a dedicated 5v supply? Thanks for the quick replies and great info! :slight_smile:

5

if you have an external 5v supply, the onboard regulator is completely unnecessary.

Usually you only need a 5v supply of one sort or another when running a graphical LCD, since the additional load of the backlight can pull too much power from USB

6

Ok cool, thanks… I’ll be running the rrd Glcd but I’m using a cooler master 1100w ucp psu so it won’t be an issue and it’s already in use so I might as well use that protected 5v feed instead of stuffing around. Really appreciate the quick help! I’m off to finish soldering so thanks a lot for clearing that up, saved me a heap of time. :slight_smile: