What's this?

This is DIY driver for flashlights with brigh LEDs, such as CREE XM-L, XP-G and others.

It is created as replacement for default LED driver in your headlamp.

Driver firmware is open-source, so you can modify it on your own anytime.

Even without programming skills you can set up all working parameters just by editing definitions in .h file.

Or you can flash .hex file with default parameters.

For firmware upload you will need Arduino or any ISP programmer, such as USBASP.

Benefits:

- ON/OFF with single button click (tact switch button). This was a main reason why i made this project.

- Working voltage: 2.3V - 5.5V, 4A maximum current (with SI2323 mosfet).

- Extremely low power consumption at moonlight mode: only 5mA with XM-L led. With standart 18650 cell it will beam more than 20 days.

- Stepless brightness adjustment with gamma-correction, from moonlight to turbo. Brightness level is remembered for the time of shutdown.

- Battery voltage control with power-off when battery is discharged.

- Two additional modes - emergency beacon and strobe. Additional led for backlighting.

- Reverse polarity protection and ESD protection.

Also, this driver is wery compact (25 х 12.5 mm / 1 x 1/2 inches), so it can be installed in many headlamps or other devices.

Partlist contains 10 required components (Attiny13, mosfet, resistors, diode and capacitor) and 5 additional (ESD protection diodes and smd led).

All source code and documentation can be found on github.