That's pretty straight forward. It's basically the same ideas as the LM2725-ADJ that I'll be using the step down from 24 to 12 V all bundled with an inductor into a nice little package. Basically by varying the value of the two resistors you can change the output voltage, mainly the resistor connecting pin 6 and pin 7. That said both resistors play a role. I tried looking up the datasheet for that converter and it is fantastically ****ty (from a Chinese manufacturer - nuff said). They have an equation for calculating the output voltage based on the resistor values but it seems to be on crack. I'll run through the math and see if I can clean it up and make some sense of for you, then give you a graph of the resistor values versus output voltage.

Hmmm, I kinda figured it wasn't great. Here's the unit I bought on ebay:

http://www.ebay.com/itm/HRD-Series-C...item3a67dc22c9

Not sure if that gives you any more info than you had already.

Ya, I know which part it is. The converter itself is actually really good... just the data sheet explaining it sucks. I'll see what I can dig up. I'll have something for you tonight.

lol... I'm sure the package of goodies made the decision to stay home easier. :mrgreen:

Let me know how those HRD's work out, and how warm it gets. ( I Ended up going with a LM2576HV instead )

When you get a chance, pm me so I can get payment out to you.

I finally got to sending them your way today. And PM'd ya with the specifics.

Not much progress, plan to solder up my protoboard tonight or tomorrow. Here is what I made for the enclosure, there's a groove an inch below the heatsink that I can slide in a splash guard. I also made the top with a 120mm PWM controlled fan.

http://imageshack.us/scaled/medium/4...3021600134.jpghttp://imageshack.us/scaled/medium/1...3021600132.jpg
http://imageshack.us/scaled/medium/8...3021600131.jpg

(Almost hate to paint it)

Come on Dom..... let's see some pic's!

Sweet looking enclosure!!! That's going to look awesome!
Lol, I've been so sick with this crappy flu and busy at work I haven't done a thing. Sounds like my stacking headers hit Vancouver though and will be shipped to me shortly (thanks to ScubaSteve), so I should be able to get going on that again and get some of my sensors and fans wired up to some proto boards.

Can anyone tell me where I can find the schematics and gerber file for the pcb?

Thanks in advance.

:-)

Check out RC. In the DIY forum, look for the thread: Meanwell LDD driver: for those who want to dim to 0 using Arduino. There's a couple files there, but I know one is on post #936.

Hope that helps

Meanwell LDD driver
 

Planning to use mosfet, but Meanwell LDD driver is better. Can some one show me how to wire this? Does it requires any resistors?