[sdiy] LED current source needed for 'digital' outputs?

Michael Zacherl sdiy-mz01 at blauwurf.info
Wed Mar 5 07:47:51 CET 2014


On 5.Mar 2014, at 5:42 , David Moylan <dave at westphila.net> wrote:

> The audio running over a USB cable is a digital signal.  Relatively immune to noise.

:-) yes.
I referred to the bespoken power rail issues.

> On 03/04/2014 05:06 PM, Michael Zacherl wrote:
>> 
>> On 4.Mar 2014, at 19:07 , Tom Wiltshire <tom at electricdruid.net> wrote:
>> 
>>> I drive the uP that's producing the PWM output and the LEDs from their own +5V supply.
>> 
>> reading that thread and thinking of a flashy MIDI-controller and an USB-audio interface connected to the same bus makes me wonder how better usb-audio products manage to stay relatively silent.
>> Let alone the dirt a computer (laptop) produces anyway.


--
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