[sdiy] New MIDI (was free AS3320, AS3340, AS3310 and AS3360 samples)

[Mikko Helin]

However, a USB MIDI interface shouldn't have problems as the MIDI takes
care of the ground isolation, some keyboards and modules though connected
directly to USB and should really use the isolator chip like ADuM1201A used
on this example circuit (in addition to 1M resistor and 1 nf cap):
http://jahonen.kapsi.fi/Audio/DIY/8%20Channel%20Volume/Volume8chUI_Schematics.pdf

--Mikko


On Fri, Nov 3, 2017 at 10:49 AM, Vladimir Pantelic <vladoman at gmail.com>
wrote:

> On 03.11.2017 09:37, Florian Anwander wrote:
> > Hello Mikko
> >
> > Am 03.11.2017 um 06:18 schrieb Mikko Helin:
> >> USB ground loops can be avoided by using USB isolators like
> >> https://hifimediy.com/usb-isolator
> > Does a USB-isolator avoid groundloops, if it does not have its own
> > powersupply? I think with a USB-powered isolator you still will have the
> > ground from the computer beeing connected to the external device.
>
> usually they have an isolated DC/DC converter inside that generates USB
> power for the "other" side without a GND connection between the devices.
>
> ....This Isolator doesn't require an external power supply. It features
> an isolated, regulated DC-DC module which is powered from the USB host
> (computer) and can give out 200mA, sufficient for commonly used USB
> equipment ...
> _______________________________________________
> Synth-diy mailing list
> Synth-diy at synth-diy.org
> http://synth-diy.org/mailman/listinfo/synth-diy
>
-------------- next part --------------
An HTML attachment was scrubbed...
URL: <http://synth-diy.org/pipermail/synth-diy/attachments/20171103/644a8402/attachment.htm>