New Jarduino build gets started

[ScubaSteve]

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.

[daplatapus]

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.

[ScubaSteve]

Originally Posted by daplatapus

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.