Projects/LED Sign

NOTICE. This page is still being worked on, and is not finished. Be aware of gaps, errors or complexities that need solving before proper use!

Purpose
This project is designed to provide basic training in using various tools and techniques in the space. At the end the student will have a nice looking LED sign to show off, as well as some experience with the equipment.



.

Skills

 * Inkscape.
 * Laser cutter design and use.
 * OpenSCAD use (basic).
 * CNC Mill use.
 * PCB Mill use.
 * Arduino programming (for non-standard chips).
 * Soldering.
 * Hand construction.

Materials
To complete this project you will need the following materials.


 * 8mm Clear Acrylic.
 * RGB LED strip.
 * Wood for base stand.
 * Power Supply.
 * Blank PCB.
 * Electronic Components.

Most/All of these should be available at the space.(TODO!!!) A donation to cover the replacement of them would be greatly appreciated, and allow for continued training schemes.

Step 1: Sign Graphics
(TODO) Taking bitmap image, converting to vector, and cleaning up.

Step 2: Sign Design
(TODO) Creating cut-path etc nd scaling to match image

Step 3: Laser cutting Sign
(TODO) Setting up the laser cutter and cutting the sign, followed by etching in the image.

Step 4: Stand Design
(TODO) 4.A : Designing the cut-paths for the sign base for use on the mill 4.B : Using the 3D printer to print base. 4.C : Using the laser cutter to cut base.

Step 5: Stand Manufacture
See 4

Step 6: PCB Manufacture
Using the PCB mill to cut and drill the PCB

Step 7: Soldering
Taking a made or provided PCB and populating it.

Step 8: Micro Controller Programming
Programming up the ATTINY85 for the main program, using an external programming board.

Step 9: Final Assembly
Putting the whole thing together.

Resources
Various useful resources for the project (designs, gfx, code etc).

Blank image files
(TODO) RLab logo in inkscape. (TODO) Basic sign shape in inkscape.

Base design files
(TODO)

Electronics Design
The Positive Drive Board is designed for LED strips with a common Ground (driven high). The Negative Drive Board is for Strips with a common power (pulled low to drive).

Board designs are done in Eagle PCB