With my original sign project I set out to design something to make with my kids and their friends when they visited Cambridge Makespace. I wanted it to involve laser cutting, 3D printing, electronics and a bit of science. The project was a success and we've made loads of them, however, I wondered if I could also involve a bit of programming and make the signs battery powered plus my kids wanted rainbow lights and so this project was born.
The laser-cut acrylic sign portion of the design remains unchanged from the original but the 3D printed case is expanded to fit in a battery pack, power-switch and BBC Microbit. Plus as programming is more fun with inputs I added a hole for a button at the front of the case.
There are example Micro Python programs here on my github
As well as the 3D printed parts and laser cut acrylic you will need a AAA battery pack, a push button, a switch, a small piece of veroboard and 4 M3 nuts and bolts.
The veroboard should be cut and drilled to provide solder pads for the microbit. Put the board on the microbit copper side up to avoid shorting and of the pins on the Microbit.
The microbit is installed in the case with 4 bolts that also connect it to the rest of the circuit. The rest of the components are fixed into the case and soldered together. A glue gun is used where necessary to hold things in place.