I 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
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?)
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!
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.
Last Edit: Sept 1, 2022 14:04:04 GMT by ampersands