I lack hardware info on the website. I had to search high and low to find out what GPIO pins HiFiBerry uses. There are also a bunch of jumpers that I need documentation for.
I assume that the unpopulated holes next to the GPIO connector are parallel to it so that you can solder in a pinheader for expansion.
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Anders Gustafsson Yes, that is where I found it, the explanation of GPIO puns used, but I think that info like that should be collected in one place, instead of having to hunt through forums for it.
Got this via email:
The second row of pins is parallel to the original expansion header.
The +5V connector can be used to power the DAC and the Raspberry Pi by 5V.
There is another L/GND/R connector with the output. Other connectors are not designed are test connections.
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