Share ko lng ang ginawa kong HB led Driver.
COMPONENTS USED ARE:
1 - MAX16804 - Linear Constant current led driver / QFN20 package / 5.5V to 40V input / 350mA Max output current
for more info click this link
http://www.maxim-ic.com/quick_view2.cfm/qv_pk/52501 - Luxeon 1W White LED - 3.5 to 3.7 V / 350mA
2 - 1uF /50v Ceramic SMD 0805 - for decoupling the power supply input
1 - 10k potentiometer
here are some pics:

For the PCB, I used a presentisized PCB from Alexan



pasensya sa pics at medyo malabo cam ko.....

peace