Post by thetechnobear on Nov 12, 2018 11:26:37 GMT
Ok, been meaning to do this for a while...
the idea is to collect together the information required to build DIY modules and cases for AEM from what Ive worked out myself, or collected from the forum. (I don't claim to be the author of this info, rather a collator)
I created a collection of AE hardware info a while ago for 3rd party module makers; just updated it - see here: AEmodular_HW_specs_DIY.pdf (202.77 KB). thetechnobear, your collection is awesome! Let's put it all together; if any info is needed please let me know!
Post by thetechnobear on Nov 12, 2018 13:57:51 GMT
thanks robertlanger that document is perfect it contains the exact dimensions I was missing, and pictures to illustrate it properly
How would you like to proceed? shall I assimilate this into the my document? (Im very happy to continue to improve it, and bring in this extra valuable information) I think its useful to have the document in a place where its editable by the community, so it can be extended / improved by anyone. (wiki concept )
that said, Im happy for you to copy the document and put it on your google docs account , with you as owner - might makes sense in the mid term.
Im easy with whatever you'd prefer - I just wanted some 'tidbits' that id been collecting in one place.
one thing , I noticed as i was compiling it. really its covering a few different things.
a) physical/electrical specification b) connectivity 'tips' (e.g. eurorack/audio) c) DIY module building tips.
I'll try to format it like that, but if the doc gets to big (i don't think it will), perhaps some of these might be separated as they might have different 'target audiences'
could I ask a couple of questions for the guide, clarifications more than anything
a) mounting hole separation on the case/width of modules your HW guide said that the holes on a 2U module are 25.4mm apart. but a 1U module is 25mm, so a few of those would not line up!? or is everything lined up/assumed to be 25.4 mm ?
b) do you have a pinout for the Eurorack connector? is it just voltage or does the cv/pitch bus get copied across?
c) CV IO vs Audio IO on master module Ive noticed you can pass audio into CV IO , what is the technical difference between the two?
does audio IO assume a 2.5v offset?, CV no offset. is AudioIO DC coupled? whats the output level of the Audio output? (I think i see around 3vPP , line level is 3.4vpp usually, so I guess this, or does it go higher?)
is there any filtering on the audio IO, thats not present on the CV IO ?
d) PCB thickness Ive measured 25mm as module depth (excluding faceplate) , which implies you use a 2mm thick PCB ?
e) Max current draw of all modules. is there a total for one master module? is this limited only (within reasonable limits) by the PSU? or has the 5v regulator got a maximum?
f) on average whats the current draw of a module? (just a rough ball park figure ...)
g) eurorack connector which power rail do you draw off? (5v? 12v?) i guess a combo of e/f whats the likely draw on the eurorack power supply. (usually eurorack modules state draw, so that you can manage your eurorack power supply)
Cool idea with the Google Doc! Maybe we could even get part numbers for some of the components, like the correct pin headers, potentiometers, switches, etc. so that we can get stuff for our DIY adventures that’s in line with the commercial modules.
Reviving this thread, as I just received my system and extras, and already planned some possible modules in this format.
The page on the wiki about the physical characteristics states a 2mm thick PCB, which I originally found a bit strange for a low cost solution, yet I could imagine there would somehow be reasons for it.
I measured the PCB thickness for the DIY kit at 1.6mm, so in doubt, I unmounted a random module (delay) on which I also measured a 1.6mm thick PCB.
I now just found this post with the specs PDF, which doesn't give details about the PCB thickness.
It could look like an insignificant detail, yet... details count!
robertlanger could you please confirm the PCBs should be 1.6mm thick? Thanks!
The PCBs are always 1.6mm thick, total standard! /endOfOfficialAnnouncement
Apologies for asking this again, maybe this is a better place to my request I have already posted in the shopping list thread.
All in all a standoff height for a blank panel should be 8 mm + 1.6 mm + 15 mm = 24.6 mm ≈ 25 mm if I am not mistaken.
Is it a 25 mm M3 standoff for a blank panel? A difference of 0.4mm is a lot to NOT fit exactly imho. Is it 24 mm with the use of some additional distance spacers maybe? On the product photo(s) it is not clearly pictured from underneath unfortunately.