DAC plugged on RasPi, how to access other GPIO Pins?

Hi all,

i have a RasPi 3 with an attached DAC+ Board.

For an ambilight project (http://powerpi.de/atemberaubendes-ambilight-am-eigenen-tv-selber-bauen-raspberry-pi-2-tutorial-teil-1/) i need to attach some cables to PIN 9, 19 and 23.

Questions: Are these Pins allready used by DAC +?

How to connect to them? If the DAC is attached i can not solder to the Pins?


Sorry, if you think this is a stupid question.


Thanks and best regards



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