In the last Coffee Break for 2020, bp9 is trying to understand the circuit of his garage door opener, and still hard at work on his encrypted client/server project. No shared key here, but rather a proper public/private key like SSH. Did Solbu fall asleep again? Reminds everyone that Robbie has been crazy buzy, not taking a break. Doug is waiting on fan and heatsinks for his RasPi. Peter reminds bp9 to use opto-isolators and talks more about circuits, Synology and lightning. Merry Christmas, Happy New Year, and stay safe everyone! bp9 is joined by Doug and Peter.