 Hey, I'm making a Neo Key Trinkie tester using a teensy 3.6 and our teensy brains when I press this button It goes through the whole procedure Programming checking the USB and locking the chips finishes in about three seconds And then I've got a beautiful Neo Key Trinkie and then what you do is People can pick what cherry MX key they want to solder on to it And then you can have like a beautiful glowing key cap that does Thing in this case. It's just doing a buzz consumer control, but it's reprogrammel in Arduino or circuit python Thanks to samd 21 e18 on the bottom there and the reverse Neo pixel So very cool very fast very easy going to be in the store real soon Neo Key Trinkie your best friend from mechanical keyboards