Can anyone tell me what components I would to buy to make a 700mA driver like this one? (I know the picture says 1000mA) I want to build my own circuit board with a 700mA driver on the board. I just don't know what parts to buy to make the driver

DRIVER SPECS
DC IN (V-DC): MIN 10 MAX 32
OUTPUT: CURRENT 700mA V in - 2.5V

 

Hello,

If you want to make a buck converter yourself, have a look at the LM3404.

Bertus

 

To be more specific I would like to make something like this the driver is build on the board with the led emitter

 

You might find useful information from the flashlight modders. Sounds very much like what you're doing?

http://www.candlepowerforums.com/vb/forumdisplay.php?92-CPF-Custom-Flashlight-Builders-and-Modders
http://theflashlightforum.com/index.php?board=13.0
http://budgetlightforum.com/forum/otherled/mods

 

In away it is like a flash light i plan on making a half moon circuit board on a PCB I got a quote for someone to make it for me but it was about $1200.00 I know the components couldn't cost me more than $50.00

 

$1200.00 is not a bad price for "one" of something. How much cheaper do you think you can do it assuming your time is worth nothing ($0.00) to you?

 

I'm not entirely sure how much I could do it for because i don't know what components to buy. like resistors voltage regulators ext. the board it self would be fairly cheap to make with a copper sheets and a laser printer. The cree leds are around 0.50 a peice. so I would imagine I could build it with just the parts for around 100-150 dollars. I have already made a prototype with puck drivers and cree led star boards for less than 70.00 dollars. I just need to know what components i need to buy to put on a PCB.

 

Well I think you need a buck converter chip, some low ESR capacitors, a Schottky diode, an inductor that won't saturate at twice the output current, and a well laid out PCB with low impedance current paths. A degree in Electrical Engineering wouldn't hurt, but you'll get there eventually with trial and error.

Besides PCB layout, board fabrication, component acquisition, board assembly, and testing there are countless other things you need to do for a successful design.

PS: the LM3404 datasheet that @bertus looks pretty complete including part numbers for typical inductors.

Good Luck.