#15

you must confirm your 5v spec. the old make noise power supply burns itself to the ground and takes the modules and grid with it.

#16

Edit - having read tehn’s post that came in as I was writing mine I’m going to remove what I said. I wasn’t aware of the specific issues the old make noise power supply has.

#17

the old supply has no protection. it will seem like it’s working fine, overheat the linear regulator, melt completely, then throw 12v onto the 5v rail.

I lent Tony a ww and grid so he could “see” this happen for himself. ugh

their new supply is certainly fine. just check.

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#18

Ah, thanks for the warning @tehn . So the case I have is the new Shared System w CV bus linked in the post above by @kedromelon - which provides 1A on the 5v rail. I bought it new last October - so would you say it’s safe to assume this system will be free of the (frankly terrifying) issue you describe?

#19

you’re good! no switch needed. though I don’t know how the power supply’s grounding layout, so there might be a noise issue, but you’re likely all set

#20

Great, thanks. If the grids cause noise I can always get the switch later - as long as I’m not going to fry anything! Thanks @tehn

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#21

I’m curious, as I have a Shared System too, how are you trying to power a grid from it? I thought the monome modules were required to power a grid, or make it useful at all in eurorack? I have a isms system as well but I’m thinking about migrating some monome modules into the SS case, how do I know if I’ll be okay to power an earthsea and teletype from it @tehn ? It’s a black and gold shared system purchased last September

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#22

what does the 5v kit add to the power supply, or why would one want that?

#23

Hey, When I say ‘power a grid’ I mean using one of the modules plugged into the SS case power. Based on tehn’s replies to me above it seems you should be fine to use the case with your grid. :grin:

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#24

the 5v expander adds an extra half amp to the 1A supply, getting it to 1.5A. the monome modules pull 600mA or more to power the grid, and though they should be within the newer MN psu specs I only knew of other users confirming they worked with the added safety of the expander. if anyone’s confirmed the 1A is enough, that’s great!

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#25

I don’t use the row power as I have the Elite Modular 208 case, my point was to power bus board and switch parallel using the built in power socket of the case. But I think there is the newer MN bus board in it so maybe I don’t need the switch at all.

#26

Just a quick suggestion to double check the +5v draw of your other modules. If you have a number of digital modules running off the +5v rail you could use up most of your supplies capacity before the grid is even attached. Most supplies will shutdown when overheating, but I’m not sure if the updated MN supply does this or not.

#27

Hmmmm, good point. Feel like that takes me back to ‘f–k it just buy the switch’ territory. :slight_smile:

#28

in general the modules will draw substantially less than 600ma.

the warning is really for a severely underrated supply. anything that gives 1A would hopefully have a graceful shutdown on overheat/etc.

because honestly i find the switch annoying, needing to have an extra power cable. it’s fine if you can do something like the 4ms rowpower trick.

Ansible & grid / power issues?
#29

glad to see someone has the same setup as me. Im using a switch and I emailed make noise guys and that’s their recommendation too!

#30

So Make Noise said to use the switch? I’m confused now. I don’t want to use it but it seems prudent to do so. Sigh.

#31

of course makenoise will say use the switch, it takes away any liability.

this really is simply about arithmetic. add up the milliamps.

#32

as a switch user, i’ll just chime in and say that it’s not that bad

i have a few bricks that live on one power strip with all of their leads wrapped together.

#33

I have two switches. Wish they made an uber switch. But I prefer the peace on mind. With so many digital modules I try to lighten the load anytime I can.

#34

i just recently got meadowphysics, and have it installed in my 7u make noise case, which i purchased from them new in november. no issues at all powering the grid, as far as i can tell.

none of my other modules use 5v though, so i can’t comment on the capacity of the power supply, or whether or not it shuts down on an overheat.

edit: dunno how i hadn’t noticed before, but there is an issue with noise on the cv bus case. perhaps i will have to pick up a switch.