Kindle 4 - Light

thingiverse

This light is designed specifically for Kindle version 4, not the touch version. The light emanates from a green LED, powered by the Kindle itself using two small pads located on the back of the device - a feature likely intended to power an embedded light within a cover, but ultimately utilized to energize this external attachment. These pads can deliver a voltage range of 4V-4.1V. My green LED operates efficiently at approximately 2.4Volts and 20mA current levels. To optimize performance, I added a 100ohms resistor to the circuit. Four magnets were used to create a detachable connection between the LED and Kindle, enabling easy removal for transportation purposes or simply because it's fun to do so. A sheet of tracing paper was placed in front of the LED to reduce light intensity; additional layers may be applied to achieve even dimmer illumination levels. Initially, I considered creating a custom foot for the LED using printed materials, but ultimately opted for a 0.6mm diameter steel wire, which provides sufficient structural integrity and flexibility to bend the light into any desired shape. Watch this project in action: https://youtu.be/UfkJRB5TEB0 Print Settings: Printer Brand: RepRap Printer: Psyque Rafts: No Supports: No Resolution: 0.2 layer height Infill: 0% Notes: I employed the spiral printing method (vase mode), resulting in a single perimeter wall. Due to this approach, the original hole for the LED was eliminated; therefore, it had to be drilled after the fact.