Modify the DX buck drivers output

[TheiTay]

18V 5W Cree Circuit Board for Flashlights (16.8mm*5.5mm) - Free Shipping - DealExtreme

I want to buy this product and modify the output to 1.8amps. is it possible?

Thanks!

 

[Cyparagon]

Yep. Just change the current sense resistor on the left there. 0.15 ohms should do the trick.

 

[sinner]

R450 to R500 (0.45 - 0.50 Ohm) can be paralelled with the existing R200 to give you 1.78-1.85Amps :beer:

Vref of the AX2002 IC is 0.25 , so you can calculate your own resistance required :beer:

 

[TheiTay]

R450 to R500 (0.45 - 0.50 Ohm) can be paralelled with the existing R200 to give you 1.78-1.85Amps :beer:

Vref of the AX2002 IC is 0.25 , so you can calculate your own resistance required :beer:

where can i buy those kind of resistors? and how do i install them properly?

any1 here have already done it before?

 

[Blord]

This has been discussed before. Everything is explained here.
http://laserpointerforums.com/f67/driver-mod-up-1-8amps-2x-3-7v-3-0v-cells-59336.html