Page 2 of 3 FirstFirst 123 LastLast
Results 11 to 20 of 24

Thread: AC - 12v DC Converter For Testing

  1. #11
    Newbie
    Join Date
    Jun 2005
    Posts
    23

    I use a Radio Shack...

    ... 25 amp switching power supply for bench testing.

    http://www.radioshack.com/product/in...entPage=search

    It is about $110 u.s. Maybe a little more power than you need for now, but I have never heard anybody wish for a wimpier power supply. I bench test some fairly heavy 12 volt comms stuff.

  2. #12
    Ra_
    Ra_ is offline
    Newbie Ra_'s Avatar
    Join Date
    Aug 2007
    Location
    Buckeye Country
    Posts
    26
    Quote Originally Posted by Darkman613 View Post
    Here is what I have been using... works perfectly!

    http://cgi.ebay.com/ws/eBayISAPI.dll...MEWN:IT&ih=012



    I'm not sure if it's still available though...
    Kind of on topic...Similar idea to above, I have a spare IBM power brick (from my T23 laptop) lying around. It's rated at 16V output. Can I use it to power up my Carnetix 2140 for bench testing? If so, it has two color wires, brown and blue, which is positive and which is ground? Also, based on above, it looks like they piggy back the ACC to constant power. Can someone confirm?
    Mazda RX-8 . Mac Mini 1.83 Core 2 Duo . Centrafuse 3.1 . Carnetix P2140 . Xenarc TSV7

  3. #13
    Variable Bitrate
    Join Date
    Sep 2007
    Location
    West Springfield, MA
    Posts
    366
    The only problem I know of with using a laptop power brick is most of them only put out 3 amps or so. Most likely not enough to run your computer. Many of the places that sell these bricks above sell ones that put out more amps.

  4. #14
    Ra_
    Ra_ is offline
    Newbie Ra_'s Avatar
    Join Date
    Aug 2007
    Location
    Buckeye Country
    Posts
    26
    This brick is rated at 4.5 amps fwiw. I'm actually just trying to bench test a servo that will motorize a screen unit.
    Mazda RX-8 . Mac Mini 1.83 Core 2 Duo . Centrafuse 3.1 . Carnetix P2140 . Xenarc TSV7

  5. #15
    Newbie
    Join Date
    Apr 2008
    Location
    Baghdad, Iraq/Fort Bragg, NC/Saginaw, MI
    Posts
    27
    Hmmm... I must be missing something here...

    I've always used a car battery charger, set on low... it outputs around 14 volts, but all my stuff has always had internal power regulators anyhow...

    I picked mine up from autozone, or something like that, for $30...


    peace
    Mike

  6. #16
    Raw Wave Rob Withey's Avatar
    Join Date
    Apr 2000
    Location
    Bedfordshire, UK
    Posts
    2,139
    Quote Originally Posted by conjur View Post
    Hmmm... I must be missing something here...

    I've always used a car battery charger, set on low... it outputs around 14 volts, but all my stuff has always had internal power regulators anyhow...

    I picked mine up from autozone, or something like that, for $30...


    peace
    Mike
    Me too. Worked well for over 6 years so far : http://www.mp3car.com/vbulletin/powe...wer-house.html
    Old Systems retired due to new car
    New system at design/prototype stage on BeagleBoard.

  7. #17
    Variable Bitrate
    Join Date
    Sep 2007
    Location
    West Springfield, MA
    Posts
    366
    I don't understand the issue either. If I had to do any bench testing I would simply use a battery charger. It seems that it works for other people, so that's going to be what I do if I need to.

  8. #18
    Low Bitrate Ricksastar's Avatar
    Join Date
    Dec 2007
    Location
    CT
    Posts
    73

    would this work for bench testing?


  9. #19
    Newbie
    Join Date
    Apr 2008
    Location
    Baghdad, Iraq/Fort Bragg, NC/Saginaw, MI
    Posts
    27
    Ricksastar: That looks like it should work, so long as it doesn't have an "auto off", that turns its self off when the battery is full (trust me, the auto off function causes heartburn... I thought I fried my PIC sooo many times, when nothing would work, till I realized that I stopped getting power, lol)

    Not really sure if mine uses some sort of auto off, or if its just the fact that I'm pulling more current than it can supply... but either way, it's been a good testing tool, and has yet to let me down (*jinx's self*)

    peace
    Mike

  10. #20
    Low Bitrate Ricksastar's Avatar
    Join Date
    Dec 2007
    Location
    CT
    Posts
    73
    sweet! thanks for the feed back Mike appreciate it. Gonna put it all together tonight and give her a test run... fingers crossed.

Page 2 of 3 FirstFirst 123 LastLast

Similar Threads

  1. DC Input AC output using MPI-400
    By sathish17110 in forum Power Supplies
    Replies: 1
    Last Post: 12-27-2007, 10:43 AM
  2. dc - ac power inverter
    By dasaint80 in forum Power Supplies
    Replies: 3
    Last Post: 12-10-2005, 03:16 PM
  3. new 200 watt PW200M DC DC converter?
    By Xtreme2k2 in forum Power Supplies
    Replies: 10
    Last Post: 06-06-2004, 04:04 PM
  4. Replies: 5
    Last Post: 08-20-2002, 08:29 PM
  5. why not to use zener to make 12V DC??
    By embedded in forum Power Supplies
    Replies: 4
    Last Post: 04-26-2001, 08:54 PM

Bookmarks

Posting Permissions

  • You may not post new threads
  • You may not post replies
  • You may not post attachments
  • You may not edit your posts
  •