[SOLVED] Question about connecting a DC-DC converter to Power supply

[WattageYourQuestion]

Im building a thermocycler and trying to use a 15v 600w power supply to power everything within it. However, I need both 12v (.24A) for case fans and 5v for logic. I was looking at this variable stepdown converter https://www.prodctodc.com/dc-to-dc-...ustable-step-down-converter-module-p-256.html . I've never worked with DC-DC converters, would one work and are there any considerations I should take into account?

Thanks for the help.

 

[jay32267]

I use them all the time.
Make sure you don't exceed the output ratings on the converter.
Although I am a bit confused with the converter you posted....as I'm thinking.....it may only output one voltage at a time.....as I would expect more wires.

 

[WattageYourQuestion]

You're right, it would only have one output. Do you think it would work to have two of them running off the same 15v rail?

 

[jay32267]

You're right, it would only have one output. Do you think it would work to have two of them running off the same 15v rail?

For sure it would work.....as long as the 15V rail can supply enough current for both,

 

[WattageYourQuestion]

Awesome. Are there any safety things I should worry about when testing the output voltage? I'm not positive how the wattage of a PSU works but in my mind it shouldn't be outputting 600w at all times, only when under load right?

 

[jay32267]

It only outputs what you draw from it.
If nothing is hooked up to it....it is outputting 0 watts.
Theoretically it CAN output 600w if you draw that much from it but only if you draw that much from it.

As far as safety....the highest voltage involved should be no more than 22 volts.....so from a "getting shocked" standpoint....you won't get shocked (unless you did something like touch your tongue to it....lol).

As far as testing the output voltage....you can use any multimeter......make sure it's set to Volts DC.