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Post by tIB on Sept 17, 2023 18:05:14 GMT
So my tbd issues are leading me towards messing with power - it's probably due as I'd imagine I'm pushing fairly close to limit with my current digital heavy 3x16 (I had quite a bit of headroom last time I checked though have added a couple of bits since).
Anyhow, I have a desktop variable linear PSU I'm going to mess with next week that outputs a couple of amps - I'm thinking I'll make a cable to run 5v and gnd direct into the distribution cable. If nothing else it will be interesting to see if any system noise is eliminated.
My other plan is to try running off one of the new raspberry pi psu's, which provide about 4A and add an on/off switch through usb c connector. Hoping the supply is pretty low on noise - I've been pretty impressed with the raspi PSUs in the past and have a mate who swears by them.
I figure whatever happens with the TBDs - I'm pretty sure issues are code related rather than PSU after more testing earlier in a smaller config - having more headroom in the system can't be a bad thing?
Advice welcome...
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Post by tIB on Sept 22, 2023 5:30:35 GMT
So set up my linear PSU with banana to IDE adapters - powered the system with the three amps it puts out. All worked fine as you'd expect, though I was hoping for an improvement in signal to noise which didn't happen, though I think that's mainly down to the effects module.
Anyhow the raspi PSU arrived and seems great - waiting on the usb c chicklet to wire that in. I could do it direct from the switch but decided I'd rather have a jack to plug in/out of. That also puts out 3A so plenty headroom, not that the issue I was checking power for turned out to be power related.
Still, worth the messing if all works as should since I'll have freed up an extra space for fun stuff.
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Post by tIB on Sept 26, 2023 16:35:38 GMT
Righty, USB-C input PCB finally arrived... soldered a DIY header I made into it, taped around the PCB and mounted to side of case via M3 bolt and number plate tape(!), plugged in/switched on the raspi psu... Works like a charm!
I'd need to do some proper testing to see if system noise is reduced at all - it's definitely not worse - but, if nothing else, headroom in the system has been dramatically increased (almost 4x more juice) and I've freed up a module space* for something more fun.
I'll post some pics when I get round to it...
* Well, sort of - I might still want a couple of 3.5mm inputs though am scheming on how to hack that.
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Post by dizzeesatchel on Sept 27, 2023 15:47:13 GMT
tIB would be interested to see a picture of this setup! More headroom would be a good thing with the increased number of digital modules as you mention. If i remember rightly robert mentioned working on an updated version of the master module so maybe this will provide more mA?
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Post by tIB on Sept 27, 2023 16:21:42 GMT
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Post by tIB on Sept 27, 2023 17:25:02 GMT
   Here you go - hopefully you get the idea? Also note my space saving headphone amp - that's a whopping two spaces gained in addition to my u-module slimdown (more functionality and two spaces gained iirc!) Thanks to whoever it was who did the usb input mod in the first place and shared it. Thanks also to my mate who told me about the quality of those raspi psu's - they really are very good! |
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Post by keurslagerkurt on Oct 4, 2023 21:09:08 GMT
Interested to see how stable the 5V will be! I was planning on testing the same thing. I actually had the same hacky setup (i think @tuesdaynightmachines was the first one to do it and share it) but with micro USB. I reckon that USB-C is more adequate for stable power delivery.
I only used the USB power on the road on holiday two years ago, with a kinda noise boxy setup and a crappy power bank. I believe when the battery on the power bank dropped lower, the tuning was def altered. I don't really mind for a portable setup though.
This year i used a new powerbank together with the MyVolts ripcord which does USB 5V -> 9V barrel supply. So the conversion up to 9V gives the 'voltage headroom' needed to make the 5V actually stable in the AE. I used the latest 'power' module cause i needed a headphone output anyway. But my bet would be that the raspberry pi psu is even more stable.
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Post by tIB on Oct 5, 2023 5:38:06 GMT
Interested to see how stable the 5V will be! I was planning on testing the same thing. I actually had the same hacky setup (i think @tuesdaynightmachines was the first one to do it and share it) but with micro USB. I reckon that USB-C is more adequate for stable power delivery. I only used the USB power on the road on holiday two years ago, with a kinda noise boxy setup and a crappy power bank. I believe when the battery on the power bank dropped lower, the tuning was def altered. I don't really mind for a portable setup though. This year i used a new powerbank together with the MyVolts ripcord which does USB 5V -> 9V barrel supply. So the conversion up to 9V gives the 'voltage headroom' needed to make the 5V actually stable in the AE. I used the latest 'power' module cause i needed a headphone output anyway. But my bet would be that the raspberry pi psu is even more stable. In terms of voltage headroom, one thing to know about the ripcord is that it puts out a maximum of 1.33A at 9v. More than the AE power units then, which will only pull 800ma of that. The 5v usb c one is rated higher at almost double that at 2.4v - that's the way to go direct into the system imo... I used a 9v ripcord with success - before I added a lot of power hungry digi modules I could get a day or so out of 3 rows. That probably reduced to four hours or so with greater pull. The only thing I will say is make sure you get an online switch - there's something about the way it powers on from the usb bank that the multifx doesn't like - there must be a lag reaching full power or something - but with a switch all works well. I've not yet tried direct from the power bank with usb c, though my switch arrived earlier in the week so will give it a go today. I'm hoping that works just as well, if not I intend to buy one of the 5v usb c ripcords and use it with an inline switch for portable. |
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Post by tIB on Oct 15, 2023 12:00:17 GMT
Just a quickie to say the usb powerbank seems to work fine when using a switched cable. No noise issues which was my fear.
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