Ariadne Conill 🐰
my focusrite scarlett 2i2 has started buzzing. grr.
i am powering it via probably the shittiest possible usb-c cable. i wonder if getting a better cable would fix it.
adding a powered usb hub did not fix it. so i modified a usb cable to let me splice in power from an external 5v psu.
*that* fixed it.
this is a *server motherboard* ASRock. what are you even doing. why is there noise on the USB power rails.
Klaus FrankGet yourself an USB Opto-isolator. The latest ones out of china that I've seen ship with a DC-DC isolator making it unnecessary to splice in an external 5v and it is still isolated up to 10kV or something like that.
I use it for my CNC as the motor causes the USB to drop so low that the host circuit kept detecting it as a reconnect signal. (Also I had to find a 2.0 only host controller as all of the 3.0's when downgraded were not "lenient enough" for this thing...)
@agowa338 already done. it arrives later this week.
the DC-DC isolator is basically a dc-ac converter + transformer + ac-dc converter but all in one small component. Hence it should be good enough to smooth out the unclean power.
And this one here is the cheap one I have. It is good up to 2.5kV (according to the seller): https://de.aliexpress.com/item/1005007254879252.html
