Schematics and PCB files for the Button Daughter Board of pcDuino3S Posted by: admin , June 10, 2014 Inside pcDuino3S , there is a daughter board for LED and key button. To facilitate users to tinker with it, we provide the schematics and PCB files. 1. Schematics 2. PCB Share! Tweet admin About the author Leave a Reply Cancel replyYou must be logged in to post a comment.