LED driver panel 5x4

LED Driver

Open hardware project of the LED driver for trench flashlight, created for the needs of Ukrainian volunteers.

The driver provides stabilized current for powerful LEDs (1 W) and is designed to be powered by one Li-Ion battery (18650 or compatible).

Purpose

This board is one of the modules of the trench flashlight project.

Main tasks:

• powering powerful LEDs from one Li-Ion battery;
• current stabilization regardless of battery voltage;
• high conversion efficiency;
• simple design and low cost;
• possibility of manufacturing at any PCB production.

The project is distributed as Open Hardware.

3D case model

https://makerworld.com/models/1538391

Revisions

Rev.  A

• board 20 × 60 mm;
• 2 × RED LED;
• 2 × WHITE LED;
• the board is a mechanical base for the LEDs.

Rev.  B

• 20 × 30 mm board;
• only RED LEDs are mounted on the PCB;
• WHITE LEDs are connected by wires to two contact pads;
• smaller area and lower cost.

Panelization

Script

chmod +x make_panel.sh
./make_panel.sh

KiKit

kikit panelize \
--preset led_driver_panel_jlcpcb.json \
LED_driver.kicad_pcb \
panel/LED_driver_panel_5x1.kicad_pcb

or via:

PCB Editor → Tools → KiKit → Panelize PCB

Panel parameters:

• 5 boards in a row;
• V-score;
• technological rails;
• 100 × 70 mm.

Recommended PCB parameters

• 2 Layers
• FR4
• 1.6 mm
• 1 oz Copper
• HASL Lead Free

License

This project is distributed under CERN-OHL-S-2.0 license. LICENSE file contains license terms.