Loosely inspired by the Apple Cube USB Charger Bracket, this is a mount for a 5V A1 USB power supply (this one at Adafruit and a tiny breadboard. There is a small cubby between the breadboard mount and power supply to stuff a short USB cable into. It's perfect for a little IOT device with a Particle Photon!
3D model and more available at [ thingiverse.com ].