Battery

The “Ferris Cosmic” is a branch off of the Ferris Sweep 2.1 keyboard design, with custom graphics and minor aesthetic changes. My github repository for hardware design of the project is done in KiCAD and is located here: https://github.com/JWehle/ferris-cosmic The github repository for the firmware is done using ZMK and is modified by Kendra Plante (https://github.com/kp9001) for a custom keys layout, located here: https://github.com/kp9001/ferris-zmk (Image) Fully assembled Ferris Cosmic keyboard (Image) In the process of soldering keyboard ...

A compact sky quality meter (SQM) for measuring light pollution in the night sky. (Image) Bare boards (Image) Layout (Image) 3D Model

(Image) Polaroid remote trigger PCB with batteries.