Ender 3 Light Bar

thingiverse

I needed light under the hotend to see what was printing. Most other light bars are mounted on the upper frame and wouldn't allow for light under the hotend to see the first layers of small prints. The light bar has two sets of LED strip lights glued to its underside, then attached to the Y-axis with T-nuts. A switch with wires soldered onto leads and heat shrink covering is mounted in the lower half of the switch box with a T-nut. The switch and light bar mount with T-nuts. Wiring runs from the light bar to the Z-motor harness into wire harness, allowing for larger prints, then down under the frame and back to the power supply, along with other wires. At the power supply, one pair of wires runs up from the positive 12v terminal, see NOTE1 & NOTE2, and another pair runs back down, connected to wires from the light bar. To drop voltage from 12v to 3.2v, a 480 ohm resistor is soldered onto the end of the wire before attaching it to the power supply. If you have any questions, post them and I'll try my best to reply. Thanks.