Plumbutter messed up my Maths

home of post-70s electronics

Moderators: Kent, infradead, bartlebooth

Post Reply
User avatar
supergregg
Common Wiggler
Posts: 153
Joined: Fri May 27, 2011 7:11 am
Location: London

Plumbutter messed up my Maths

Post by supergregg » Tue Sep 15, 2015 8:44 am

A word of warning for anyone using eurorack with plumbutter: be careful of the brown sockets.
Last night I was using the EOR pulse out from a cycling channel of my maths into the green input of the man with red steam, via the low-gain utl-1 minijack/banana which was grounded correctly. All was going well until I plugged an orange from the MWRS to a brown node and the sequence stopped. My maths channel was fried -- the envelope wouldn't cycle or trigger manually and plugging the EOR into a scope showed it was giving out a constant -5v. Power cycling the modular did not fix the problem but bizarrely after leaving it off overnight and turning it on this morning, the envelope seems to work ok again, but the EOR output is still busted.

I'm a bit surprised that this could happen, especially since I didn't even connect the maths directly to the brown. Any thoughts as to why this occurred would be much appreciated. Plumbutter was powered by normal 12v power supply.

User avatar
causticlogic
Super Deluxe Wiggler
Posts: 2073
Joined: Sat Nov 19, 2011 5:17 am
Location: atop Unknown Kadath seeking the Ultimate Gate

Re: Plumbutter messed up my Maths

Post by causticlogic » Tue Sep 15, 2015 9:14 am

supergregg wrote:be careful of the brown sockets.
Apparently there is a part of my brain that is still 5 years old...
RealDudes wrote:there's only one window in my padded cell and all I can see is a hallway
looks like there's blood on the floor again
Bumply wrote:I just want to leave work right now and listen to a nice triangle wave.

User avatar
corpusjonsey
Wiggling with Experience
Posts: 456
Joined: Mon Apr 15, 2013 10:46 am
Location: Fort Collins, CO

Post by corpusjonsey » Tue Sep 15, 2015 9:25 am

Don't eat the brown acid.

User avatar
wednesdayayay
Super Deluxe Wiggler
Posts: 1575
Joined: Wed Nov 16, 2011 8:17 am

Post by wednesdayayay » Tue Sep 15, 2015 11:31 am

I had an issue where when I was exploring triggering an old drum machine with plumbutter outs one of the three rollz stopped working
sh is the sound of data
bobo is the gesture

PB

User avatar
windspirit
Super Deluxe Wiggler
Posts: 3006
Joined: Thu Sep 20, 2012 11:43 pm
Location: krellifornia

Post by windspirit » Tue Sep 15, 2015 2:50 pm

The only advice peter gave in hooking up other modulars was to not connect anything to the brown inputs because they were "funky". Its the base of a transistor so it can do weird things, especially when connected to a couple of places.

User avatar
meska
Wiggling with Experience
Posts: 277
Joined: Wed Apr 17, 2013 1:25 pm
Location: France

Post by meska » Tue Sep 15, 2015 5:21 pm

:drunkhomer:
corpusjonsey wrote:Don't eat the brown acid.
tremblap wrote: In theory, there is no difference between theory and practice.
In practice, there is.
www.meska.fr

ClausF
Wiggling with Experience
Posts: 449
Joined: Mon Oct 08, 2012 12:01 pm
Location: Germany, FFM

Re: Plumbutter messed up my Maths

Post by ClausF » Wed Sep 16, 2015 2:33 am

As far as I understood you did that:

Maths (EOR) => (green) MWTRS (orange) => (brown)Roll

Nothing wrong and nothing dangerous in my opinion, we know that these Browns are androgynous (wheren't that the 'fishy' ones?), but they where not connected with your Maths. Everything, what came out of them, had to pass the MWTRS in the opposite direction (and out of the clock input), and I wonder if this could happen?

Maybe somebody with more knowing of the electrics behind that (MWTRS is a 4015 at the end of the day) could answer that?

So far my fear was to kill the PB with negative voltages from the Euro, but now it seeems to be a good idea, to patch whatever goes from Euro to PB through a adapter-box with build in Diode, to let the signal go only in one direction... time for the soldering iron... :guinness:

Bobaji
Learning to Wiggle
Posts: 19
Joined: Sun Jun 11, 2017 5:53 am
Location: Norwich, Norfolk, UK

Post by Bobaji » Fri Jul 27, 2018 6:05 am

is there any danger of damaging the PB this way. Just got a UTL1 box and thought I'd try it out with the dreadbox whitelines lfo and function generator I have sitting around, before using it with my maths or other make noise gear. I don't mind too much about the possibility of breaking the dread box gear but I don't want to hurt the plumbutter.

User avatar
wednesdayayay
Super Deluxe Wiggler
Posts: 1575
Joined: Wed Nov 16, 2011 8:17 am

Post by wednesdayayay » Fri Jul 27, 2018 2:12 pm

just don't use the brown jacks for anything outside of the plumbutter for best results

if you want to jerk the roll use the blue jacks
if you want CV from the roll use the orange jacks
sh is the sound of data
bobo is the gesture

PB

PLNB
Common Wiggler
Posts: 207
Joined: Wed Feb 08, 2017 4:15 pm
Location: Who Commands Your Drones?

Post by PLNB » Fri Jul 27, 2018 7:41 pm

Note to self, leave the browns alone in their happy PB wooden world.

User avatar
meska
Wiggling with Experience
Posts: 277
Joined: Wed Apr 17, 2013 1:25 pm
Location: France

Post by meska » Sat Jul 28, 2018 2:34 am

PLNB wrote:Note to self, leave the browns alone in their happy PB wooden world.
i don't remenber where but petter alraedy say that !
tremblap wrote: In theory, there is no difference between theory and practice.
In practice, there is.
www.meska.fr

Post Reply

Return to “Ciat-Lonbarde”