Ask Experts Questions for FREE Help!
  Advanced
Register  |  Log in  
   Ask    
 Answer  
  Help  

Ask QuestionsprogressAnswer QuestionsprogressBuild ReputationprogressBecome an Expert
 
Free Answers in 3 Easy Steps

Register Now
3 Steps

At Ask Me Help Desk you can ask questions in any topic and have them answered for free by our experts. To ask questions or participate in answering them you must register for a free account. By registering you will be able to:
  • Get free answers from experts in any of our 300+ topics.
  • Accept money for answers that you provide.
  • Communicate privately with other members (PM).
  • See fewer ads.

Home > Home & Garden > Electronics   »   Voltage reduction

 
Thread Tools Display Modes
Question
 
 
#1  
Old Apr 15, 2008, 02:54 PM
chesty7
New Member
chesty7 is offline
 
Join Date: Apr 2008
Posts: 2
chesty7 See this member's comment history on his/her Profile page.
Voltage reduction

I would alke to take a small pc board and convert it to take 120vac input and comvert it to 30 vac output. It would have provisions to attach a 2 conducter wire.
What componants do i need.?

Reply With Quote
 
     

Answers
 
 
Old Apr 15, 2008, 04:09 PM   #2  
Engineering & Electronics Expert
KeepItSimpleStupid is offline
 
KeepItSimpleStupid's Avatar
 
Join Date: Aug 2007
Posts: 5,185
KeepItSimpleStupid See this member's comment history on his/her Profile page.KeepItSimpleStupid See this member's comment history on his/her Profile page.KeepItSimpleStupid See this member's comment history on his/her Profile page.KeepItSimpleStupid See this member's comment history on his/her Profile page.
At what power or what current at 30 V otherwise can't answer?

I might also need the application.
  Reply With Quote
 
     
 
 
Old Apr 16, 2008, 07:24 PM   #3  
New Member
chesty7 is offline
 
Join Date: Apr 2008
Posts: 2
chesty7 See this member's comment history on his/her Profile page.
Quote:
Originally Posted by KeepItSimpleStupid
At what power or what current at 30 V otherwise can't answer?

I might also need the application.
It would be 120 vac input and 30 vac out put @500 ma. I will be using it to run a Dell Laptop.
  Reply With Quote
 
     
 
 
Old Apr 16, 2008, 08:46 PM   #4  
Engineering & Electronics Expert
KeepItSimpleStupid is offline
 
KeepItSimpleStupid's Avatar
 
Join Date: Aug 2007
Posts: 5,185
KeepItSimpleStupid See this member's comment history on his/her Profile page.KeepItSimpleStupid See this member's comment history on his/her Profile page.KeepItSimpleStupid See this member's comment history on his/her Profile page.KeepItSimpleStupid See this member's comment history on his/her Profile page.
Something doesn't seem right at all. Laptop adapters are usually DC and nominally around 45-90 watts. 30 VAC at 0.5 amps means 15 watts, which doesn't make any sense.

120 VAC at 500 mA would translate to 60 watts and 30 VDC, not AC is likely.

Check the specifications again. Some Dell Adapters are located here:

Dell Inspiron AC Power Adapters

You can also post a model number.

Many adapters are usually universal, meaning they will accept 95-285 VAC. The only requirement is to change the input power cord to the country of origin.
  Reply With Quote
 
     


Thread Tools
Display Modes

 
Similar Sponsors

Similar Threads
Question Asker Forum Answers Last Post
is there a possible sentence reduction rbaskin Criminal Law 4 Mar 15, 2008 12:20 PM
Breast reduction motherof3 Women's Health 2 Nov 7, 2007 07:07 AM
clemmensen reduction android_leo Chemistry 0 Nov 2, 2007 08:34 PM
clemmensen reduction mohithere_20 Chemistry 0 Oct 19, 2007 04:16 AM
oxidation, reduction kristo Chemistry 5 Jan 29, 2007 03:26 PM




Copyright ©2003 - 2007, Ask Me Help Desk.
All times are GMT -8. The time now is 01:28 PM.