Recently I needed to replace my old desk lamp. Instead of going to a shop and buying one like a normal person, I have decided to design one for myself.
I designed the lamp to be able to fully 3D print even using a small 3D printer. I printed all the parts of this lamp using a Creality Ender 2 printer. Ender 2 has a print volume of 150x150x200mm³. To design this lamp, I used Fusion360.
3D model of the lamp
Spiral cable protector
For the light source, I used a LED light panel with 36 LEDs (5730 LEDs). That might have been overkill for a desk lamp. Therefore, I have decided to change the color of half of the LEDs. The panel originally contained only cool white LEDs. I de-soldered 18 LEDs and replaced them with warm white ones.
Warm white light
The original PCB design needed 53V volts to properly function (LED configuration:2p18s). Since I didn’t have a high voltage source, I’ve reworked the PCB for the LEDs to work with 5V. Then, all I had to do was connect a 5V phone charger to it. To get a diffused light, I’ve added a hand-sanded acetate sheet to the front.
Sanded acetate sheet as the light diffuser
When replacing the cool LEDs with warm ones, I distributed them evenly across the PCB. Later, I added a two-way switch to the back of the lamp to switch between two colors.
Addition of warm white LEDs to the PCB
Initially, I wanted to add brightness control circuits for both colors. So, I’ve placed two holes on the lamp base to mount two potentiometers, but later, when testing, I realized that I did not need to control the brightness. Since I printed it before the testing, there are two holes left on the base. (Design Files do not contain these holes).
As for further modifications, I’ve mounted several Li-Ion batteries to the lamp base and added a USB charger/discharger module. Now, I can use the lamp for up to 4-5 hours without plugging it into a wall outlet.
Design Files
You can download all the design files of this project on my Thingiverse page.
