Homebrew_PCBs

Hi all,

   could any member in this forum to design portable dc/dc power supply  with +/- 6v +/-12v voltage?
  

On 13 Jan 2016 07:39:28 -0800, you wrote:

>Hi all,
>
> could any member in this forum to design portable dc/dc power supply with +/- 6v +/-12v voltage?

Your easiest path would be to find pre-built modules that
supply the required voltage and current.

Your next easiest path would be to check out application notes
and designer software. TI's web-bench software is rather good at
this, but you'll need to be able to design PC boards and have them
made.

I'd recommend modules.

Oh, and it would be very helpful when you ask if anyone can
design a power supply to also tell us how much current is needed for
each output. You also don't specify what the main power source is:
battery? Wall charger? Car voltage? line voltage?

Harvey

On 1/13/2016 10:39 AM, john_chortomaris@... [Homebrew_PCBs] wrote:

>
> Hi all,
>
> could any member in this forum to design portable dc/dc power
> supply with +/- 6v +/-12v voltage?
>
>
>
> ------------------------------------------------------------------------
> Posted by: john_chortomaris@...

Hello, John--

You might want to expand your description of the power supply's
requirements. For instance...

--Required output current for both outputs, including cross-output
regulation.
--Output voltage noise and startup transient specifications. (Linear or
switched-mode supplies produce different amounts of noise and ripple.)
--Are there any startup consideration (i.e., does it matter if the
12-volt output reaches full voltage before the 6-volt output does?).
--Are the common connections for the power outputs tied together?
--Are there any EMI requirements? (I.E., radiated electromagnetic
interference)

Now for the input side:

--Input voltage variation range (i.e., what's the power source, and how
are its voltage and current delivery capabilities)?
--What back-fed noise does the power supply deliver, and how would this
affect other devices connected to the power source?

Packaging:

--What environment will the power supply encounter? (i.e., extremes of
temperature, humidity, dust, shock and vibration)
--How much space is available for the power supply?
--How does the power supply dissipate heat produced in normal operation?
How does the power supply receive cooling (or heating)?
--How does the power supply attach to whatever it's powering?

There are other considerations, but those I've outlined above are a
pretty good starting point. That said,
you may wind up with a commercial +/-15-volt module and four
fixed-output linear regulator ICs to produce
the lower-voltage outputs.

73--

Brad AA1IP

If I had known I could made!!!

I'd like to made a simple psu. only I know is that, must be a linear.

which of electronic module haves same characteristics with power supply which need a nim bin module? only must be linear psu?
   May power supply of LCD screens? or scaners, printers?

Dear Stefan,

  I bought the follow modules

http://www.ebay.com/itm/Nim-Bin-Nimbin-Plug-In-Canberra-1718-X-Ray-Amp-No-Side-Panels-/261299720935?ssPageName=ADME%3AX%3ARTQ%3AUS%3A1123&nma=true&si=AFapkaUs4JbbkbVNMMvG1yd4rxk%253D&orig_cvip=true&rt=nc&_trksid=p2047675.l2557

and this

NIM's:Canberra 2071A Dual Counter Timer 2081 Ratemeter Mech-Tronics 512 AMP SCA

but in the other action which it had only Mech-Tronics 512 AMP SCA

So, I'd like to power they. How can I do that? I see need only +/-12v and +/-6v

Also, I can't find cheap power supply nim module. I search on ebay but I can't fild.

No!  tI dscribe the pins and I see that don't has pins on +/-24v . Also, I speak with second module cambera and seller told me this module and the others no need standar +/-24v . I'll take an andware and for the power supply but it can't tell me yet because he is beasy now.

What other must I tell him? may the current which module need? I hope to tell me with power supply.

Stefan, may modems or cell phones have good power supply?

sorry the first is my camberra module. the second link show AND Mech-Tronics 512 which I bought.

"Portable"   and linear supplies don't go well together.  Linear PSUs are very inefficient.  You would want a switching supply assuming you are using batteries to be portable.   But until you can define your needs exactly, any advice is just speculation.

thanks dear,

  So the best module is switching supply.
Also, portable device like my Dso nano (portable oscilloscope) what kind of power supply have?

I'm from Greece.

   the better pethode is to find the side with "Guide " female and male screw.
Also the seller of one module declear that power supply need +/-6v....

if I made voltage with IC   MC34063?

Yes dear,

   I made -9v with MC34063 I can't test it with my dso nano mini oscillo...
I have 12 lead acid battery and I'll buy other one becase LM or other components have drop voltage. Also, I can't put 12v or 6v on pins of two modules because may damange...is this correct?