|
|
Post by dizzeesatchel on Jul 6, 2022 11:50:05 GMT
github.com/MattKuebrich/roundaboutI posted a bit about this on the discord; i've gotten around to building a couple of them now! Certainly a good exercise in soldering (so many little pin headers, arrgh), sourcing components and understanding a PCB. The BOM has a couple of suggestions for varying the capacitors used in the filters to get different responses - my idea for the third build (in progress) is to solder in some extra pin headers at these points, to make it easier to swap out different cap values on a whim. Will see if it works... I've tentatively cross-patched with a Volca Modular and nothing blew up, but i don't have the electrical knowledge or voltage measuring gear to want to get my AE involved! Some sound examples: If anyone's interested in getting into building stuff i'd certainly recommend it. My only prior experience was putting together a couple of AE module kits and this felt like a very manageable step up from that. Happy to help out with questions regarding getting the right components, ordering PCBs etc
|
|
|
|
Post by dizzeesatchel on Jul 10, 2022 13:23:01 GMT
|
|
pol
Wiki Editors
Posts: 1,349
|
Post by pol on Jul 10, 2022 13:39:35 GMT
This is a tempting project for the next stage after (successfully) assembling a few kits,  |
|
|
|
Post by dizzeesatchel on Aug 30, 2022 11:44:25 GMT
Just twigged that the PCB for this is exactly 100x100mm - ie. 4U module dimensions. The voltage range is entirely 0-5v (should check, but i'm pretty certain, it uses a 5v regulator for the 9v battery supply) I think with just a couple of tiny physical changes this could be converted into a module???
- Add a male bus connector for gnd & 5v in (maybe the 5v limiter is superfluous then?)
- Remove and bypass the volume pot
- Remove and bypass the 3.5mm out
- Remove and bypass on/off switch
That.....should work??
|
|
|
|
Post by MikMo on Aug 30, 2022 11:55:32 GMT
If you feed it the AE 5v from the bus, it will maybe be too little.
Most regulators require an input voltage somewhat above their stated output voltage.
If you bypass the regulator make sure to take any reverse polarity protection diodes into account.
|
|
|
|
Post by dizzeesatchel on Aug 30, 2022 12:21:44 GMT
Good point, the flow as it stands is 9v in > diode > 5v regulator > rest of circuit. So going AE 5v in > diode > rest of circuit should do the trick, i think
And just remembered one of the three roundabouts i built has a removable regulator, as it's designed to work off either 9v or 5v anyway, so that would be an ideal unit for testing (cautiously)
|
|
|
|
Post by dizzeesatchel on Aug 31, 2022 21:09:02 GMT
Initial test looks good! No problems powering from the bus. The mounting holes don't quite meet AE standards so will have to put some extra holes in the bottom of a rack to mount it, but no biggie. At 4U it's not small, but there's quite a lot packed in. One issue is it uses loads of standard female pin headers which don't fit AE cables very well, and cables which do fit are loose in AE sockets. My plan i guess is to make a simple 1U module with a long column of generic headers connected to a long column of our top-quality AE connectors to translate between the two. What fun!
|
|
|
|
Post by MikMo on Sept 1, 2022 11:17:11 GMT
Small problem here, as the diode will also cause a voltage drop, probably around 0.7V.
So only around 4.3 Volt will reach the circuit.
|
|
|
|
Post by dizzeesatchel on Sept 1, 2022 11:41:44 GMT
That's pretty standard though right? Isn't there usually a diode between the bus power and module, to protect against potentially reverse powering the bus? edit: mmm you’re quite right, i just measured and the V tops out at around 4.7v after diode. Because the original design included the diode i figured i’d leave it in there. Of course it comes before the regulator in the original design so even after losing a bit from the 9v battery there’s still plenty of headroom for the reg to output a round 5v. Maybe the diode isn’t necessary? When you said “take diodes into account” i assumed you meant i needed one, but maybe you meant the opposite, that removing the regulator meant also needing to get rid of the diode? Sorry, i’m fairly new to this  Also just looked at the BOM for the two Kurt modules i built (great divide and sloth) and they take the bus signal with no diodes, so maybe i’m just completely wrong about needing one. It did seem to work fine at 4.7v, so i might leave it like that for now in any case. |
|
|
|
Post by dizzeesatchel on Sept 3, 2022 14:31:45 GMT
 New little 12U case, made a few extra holes for the oddly spaced mounting, voila, roundAEbout! (and a bodged together little cable size converter) Nice quick little distraction from the somewhat more complex Europi build |
|
pol
Wiki Editors
Posts: 1,349
|
Post by pol on Sept 3, 2022 19:53:00 GMT
View AttachmentNew little 12U case, made a few extra holes for the oddly spaced mounting, voila, roundAEbout! (and a bodged together little cable size converter) Nice quick little distraction from the somewhat more complex Europi build Approve of the addition of the Biot, still one of my favourite 3rd party modules.  |
|
|
|
Post by maydonpoliris on Sept 3, 2022 22:04:23 GMT
View AttachmentNew little 12U case, made a few extra holes for the oddly spaced mounting, voila, roundAEbout! (and a bodged together little cable size converter) Nice quick little distraction from the somewhat more complex Europi build awesome its in! |
|
