Building Pavouk's Async USB to I2S

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Make a bath pool with isopropylic alcohol and let it into for 5 minutes. A toothbrush will help you.
Let it to dry in the air...the best cleaning procedure!

I do use isopropylic alcohol, I lost the brush I usually use, waiting for the new ESD-safe one to arrive I use qtips.

A tip from watercooling and overclocking CPU's, coffee-filters are great to wipe of the isopropylic alcohol as they don't leave any fibres or particles on the wiped surface.
 
Only the missing parts left to populate on the first board now:
USB-connector 74LVC1G80 and the LP2992AIM5-3.3.
The 2 color LED I'll populate just before the USB-connector.
 

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