Millions of people around the world live in darkness without access to lightbulbs and power. Within dense city-slums, windows are few and far between so people often open up a skylight in the roof to allow light in. A clever trick has been to place a 2L Bottle with water to disperse light and a little bleach to discourage microbial growth. Yet what about nighttime? What then? Perhaps an even better solution is a waterproof LED within the bottle, connected to a small solar panel and a battery system.
We have 4 LEDs, a single 7.5V 220mA Solar Panel, two NiHm batteries and a 2L Coke bottle. Using these components, design the casing for the LEDs so it can be inserted into the bottle, as well as the case for the panels and batteries. The designs will be made by our custom 3D Printer, a massive machine measuring 600 mm x 400 mm x 600 mm which uses similar extrusion techniques to the Makerbot.
For a deeper explaination of this project, read our blogpost on the project here - http://blog.grabcad.com/2012/09/new-challenge-design-an-led-light-bottle
For guidelines on designing for FDM 3D Printing, read this - http://wiki.makerbot.com/design-guidelines-for-makerbots
Design around 4 to 6 Standard White LEDs, 2 batteries and one solar panel.
Don't design it with the solar panel above the bottle - it will block the light during the day! Design it so that it sits next the light bottle on the roof.
Don't worry about a light switch - we will likely be using whatever standard light switches that are locally available.
The best design would have the batteries underneath the solar panel in one case. Remember to leave space for wiring.
Design the screw cap for the bottle and the plastic case for the LEDs as one, 3D printed piece. The specs for the mouth of the bottle are in the specifications sheet.
The LEDs should be in the centre of the bottle, pointing downwards and to the sides.
Design for 18 Gauge Wire, which has a diameter of 1 mm.
We want to be able to assemble it easily by hand with an Allen key. Design around M4 socket screws and inserted nuts.
Remember that whatever you design has to be waterproof - we don't want anything shorting out!
All files must be submitted as an .STL
Must submit a few renders to show how your design would be used.
Any designs irrelevant to the Challenge will be erased
Any designs that don't use the specs provided will be disqualified.
Team entries are welcome!
Tag you models to EN3D
$300 for the Best Design + GrabCAD TShirt
$100 for the second-best design + GrabCAD TShirt
$100 +GrabCAD TShirt to the most active and helpful member - you're sharing advice with everyone and rendering other people's work (and maybe uploading CAD models of the batteries and solar panel for everybody to use).
JF Brandon and Gabe Blanchet
Aims to use 3D Printing and Crowdsourcing to develop designs to improve the lives of people in lesser developed countries. Crowdsourcing through GrabCAD is a powerful way for thousands of Engineers and Designers to come up with great ideas. 3D Printing is now an affordable way to produce complex designs, on demand, using only what is needed in small quantities.