|
|
|
#61
02-05-2013, 07:36 PM
|
||||
|
||||
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.
|
|
#62
02-05-2013, 07:48 PM
|
|||||
|
|||||
|
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.
|
|
#63
02-05-2013, 07:50 PM
|
||||
|
||||
|
Quote:
|
|
#64
02-07-2013, 10:45 PM
|
||||
|
||||
|
Quote:
 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.
__________________
All spelling errors are considered intellectual property of its owner, and are not to be tampered with
|
|
#65
02-07-2013, 11:17 PM
|
|||||
|
|||||
|
I finally got to sending them your way today. And PM'd ya with the specifics.
|
|
#66
02-16-2013, 08:01 PM
|
||||
|
||||
|
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.
   (Almost hate to paint it) Come on Dom..... let's see some pic's!
__________________
All spelling errors are considered intellectual property of its owner, and are not to be tampered with
|
|
#67
02-19-2013, 01:21 PM
|
|||||
|
|||||
|
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.
|
|
#69
03-13-2013, 01:29 PM
|
|||||
|
|||||
|
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
|
|
#70
03-15-2013, 10:21 AM
|
||||
|
||||
|
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?
__________________
Wow! That's Crazy! Why would you spend that much and go through all that trouble? 
|
Linear Mode
