INTELLIGENT WORK FORUMS
FOR ENGINEERING PROFESSIONALS

Log In

Come Join Us!

Are you an
Engineering professional?
Join Eng-Tips Forums!
  • Talk With Other Members
  • Be Notified Of Responses
    To Your Posts
  • Keyword Search
  • One-Click Access To Your
    Favorite Forums
  • Automated Signatures
    On Your Posts
  • Best Of All, It's Free!

*Eng-Tips's functionality depends on members receiving e-mail. By joining you are opting in to receive e-mail.

Posting Guidelines

Promoting, selling, recruiting, coursework and thesis posting is forbidden.

Jobs

DC powered power supply w/ meter .... where do i start?

DC powered power supply w/ meter .... where do i start?

(OP)
The power supply i am trying to build is kind of "application specific".

here are my ideal requirements for this project...

Power supply will be powered by 12V DC Deep cycle marine battery.... optional DC wall outlet power
Rheostat regulated voltage
LCD diagnostic display
Battery voltage
output voltage
output amps
Hz/CPS
Duty cycle
Trickle charge back to battery when unit is turned off

RE: DC powered power supply w/ meter .... where do i start?

OK, but what is the question? Is it about the display? Or the whole unit?

"Rheostat" sounds quite out of the ordinary for a DC supply. Do you actually mean a variable series resistor? Is that what is being used in this business?

You also mention Hz (forget CPS, that was used in the fifties). Are you going to change frequency as well? With the same "rheostat"? Sorry, this spec doesn't tell me much. But if you put down the following, we may be able to help you:

1. Supply (you indicate 12 V marine battery, is marine important?)
2. Type of output. Is it a voltage or, which seems to be a possibility, a pulsed voltage, an AC voltage, perhaps?
3. Voltage range.
4. Frequency range (if pulsed).
5. Waveform (if not simple pulse).
6. Maximum current out.
7. Duty cycle (I guess that you work a few minutes and then pause for a while). D.C. shall include typical intervals in minutes.
8. Budget.
9. Explain "Trickle charge back to battery when unit is turned off" (are you expecting your equipment to return power when it is turned off?).
10. Add things that we, as non-tattoo-professionals, don't know about.

Gunnar Englund
www.gke.org
--------------------------------------
Half full - Half empty? I don't mind. It's what in it that counts.

RE: DC powered power supply w/ meter .... where do i start?

Lets start one step at a time = design details later,
Possible way of design the PS MONITOR
1-For each of the sources you have to MONITOR, you need a sensor that will transfer the data to VOLTAGE.
2-All the voltages source shall be connected to a MUX / "Analog switches" via buffers.
3-You need a controller TBD that shall present the a-DATA and b-Source Name and c-UNITS on the Display
4-You may add a keyboard TBD that shall allow monitoring the sources Manual or Automatic sequence
Good Luck-daveross100atgmaildatcom

RE: DC powered power supply w/ meter .... where do i start?

IS this for school?

There are chips that do some of this
http://www.linear.com/product/LT2940
http://www.linear.com/product/LT1512

TTFN
FAQ731-376: Eng-Tips.com Forum Policies

Need help writing a question or understanding a reply? forum1529: Translation Assistance for Engineers


Of course I can. I can do anything. I can do absolutely anything. I'm an expert!
There is a homework forum hosted by engineering.com: http://www.engineering.com/AskForum/aff/32.aspx

RE: DC powered power supply w/ meter .... where do i start?

What energy source feeds the trickle charger for the deep cycle battery?

Mike Halloran
Pembroke Pines, FL, USA

Red Flag This Post

Please let us know here why this post is inappropriate. Reasons such as off-topic, duplicates, flames, illegal, vulgar, or students posting their homework.

Red Flag Submitted

Thank you for helping keep Eng-Tips Forums free from inappropriate posts.
The Eng-Tips staff will check this out and take appropriate action.

Reply To This Thread

Posting in the Eng-Tips forums is a member-only feature.

Click Here to join Eng-Tips and talk with other members!


Resources


Close Box

Join Eng-Tips® Today!

Join your peers on the Internet's largest technical engineering professional community.
It's easy to join and it's free.

Here's Why Members Love Eng-Tips Forums:

Register now while it's still free!

Already a member? Close this window and log in.

Join Us             Close