it may have also been used for other signals in some cases, maybe like fast charging capability sensing etc. but often anything with a Micro USB may well not have any shield in any case. I'm not sure if pin 5 is part of the shell in that case. so if pin 4 and 5 are fused together, the cable is sensed as an OTB on the go cable. but another USB A to USB A cable did have continuity.Īnother thing about Micro USB is, the Micro plug usually has 5 pins. for example I just tested continuity on a USB A to Micro USB and there was no continuity on the shells. the metal shell is presumably a shield but may not always be connected. I'm not always sure what role the ground plays in USB. I'm not sure if this solution would also work for devices that need the 5V USB power. I think it is perfectly save, as there is only 5V of power running through a USB cable, but just to be sure, I'd like to hear your opinions about it.Īnother worthy mention: the Ventris is powered by a dedicated power cable, so it doesn't need (and probably doesn't draw) the 5V power off the USB cable. I then connected the usb cable to the computer and dit a test: GONE! I then cut a tiny piece of tape and put it inside the connector to cover the pin of the ground. So I figured, if I isolate the ground pin inside the connector, the ground loop should be gone. So I decided to do a little research about USB cables/connectors and I found this: I first was looking for a usb ground loop isolator, which is pretty expensive for what it does IMO (about 70 euro). So, yesterday I finally found a solution for the ground loop noise my Ventris reverb pedal was producing whenever I connected it to the computer via usb.ġ) I am very happy about it and want to share my solution to anyone else having the same issueĢ) I am not 100% confident about the safety of this solution, so would like to get some advice about it.
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