Solar pocket light white
Using the colorful Solar pocket light, it turns out a pocket light with white LEDs would be more useful. Having a second PCB from the first version left, the schematic required only minor modifications. The red green and blue LED were replaced by warm white ones and instead of the UV LED, there is a red one. The voltage was lowered from 4V to 3,5V to fit the forward voltage of the white LEDs with better efficiency. The software was adjusted to this new voltage and instead of a colorful disco mode, there is now a simple flashing mode. Because the reset pin is used as I/O pin, a HV programmer might be required.
A custom aluminum caseInstead of using a cheap plastic case, a custom aluminum case has been designed and milled. This took a long time and did not always worked as expected, but was a good starting point to learn how not to mill. The use of a rechargeable battery with a soldering lug saved the space of a battery holder and therefore allowed to make the case 2mm thinner. So for the bottom part an 8mm plate of EN AW-7075 was used. The upper part requires a plate with a thickness of 10mm. Having 1mm overlap, this results in a case with 17mm in height. The solar cell requires a piece of Plexiglas with a thickness of 2mm. Both parts of the case are hold together with a 4mm screw.
Software and schematicsAs always, use at your own risk.
|solarpocketlightwhite_v1-0.zip||Software and schematics version 1.0
|solarPocketV1.pdf||The schematics of the color pocketlight. Adjust according to the changed values given in the .zip file.|
|solarpocketlight-case.zip||The design files of the case for FreeCAD, Heekscad and G-Code.|