 Posted: Mon Nov 27, 2006 3:31 am Post subject: |
|
| Of course polarity is not an issue when dealing with AC .
As regard to the Targus, while it is not stated as having DC output however, notebooks in general take in DC & if you notice the only output cord is labeled DC (DC Output Cord length : 1.8 m) plus it is common to have AC to DC or DC to DC converters in notebook applications. As to putting two xformer in series, they should have equal outputs or else the imbalance will put too much of a load on one. There should be no problem in finding a 15V txformer in UK. Don't have to look for an already encapsulated adapter. ..Just an example..you can use many of these shown on the following page from farnell --just remember 15 V @ 500ma (or more) taking size/space in to consideration. http://uk.farnell.com/jsp/search2/browse.jsp?N=500015&Ntk=gensearch_001&Ntt=transformer+15+v&Ntx=&_requestid=1036484 |
|
| Posted: Mon Nov 27, 2006 2:20 am Post subject: |
|||
| Thanks! Bad news on all fronts then.
It's actually a VoIP phone I need the PSU for. I have to ask, how did you know that http://www.redstore.com/TARNOT196 is DC output? I just re-read it and all I see is
Assuming it was a typo for output I guess? It's proving very difficult to find a 16v AC adapter here in the UK indeed! The polarity shouldn't be a problem as I can figure that out from the manual and PSU diagram if it has one. I had success before wiring 2 identical voltage power supplies together, useful to know that asymetric PSU's won't work. Did you mean won't work, or not advisable because extra voltage to get through the lower voltage PSU than it was designed for? Thanks, am learning. If you need help with Acer laptops, I'm your man.[/quote] |
|||
| Posted: Mon Nov 27, 2006 12:32 am Post subject: |
|
| OK, sounds like your device is simply a stepdown transformer to convert from mains AC to lower (16 v AC) while capable of handling 500 miliamps of current So what yo are looking for is an AC adapter with a rating of 16 volt (AC) with current capable of 500 miliamp or more & ofcourse the end connector has to be exact w/correct polarity
Based on your description it is AC to AC or ~ to ~.. Both of your links have DC output which won't work without modification ..& it is not advisable to series two ac adapters with diff voltages---look for one single source Here's a link http://www.laptopacadapter.com/ |
|
| Posted: Sun Nov 26, 2006 11:11 pm Post subject: 16V AC Adapter... |
|
| I'm not 100% sure by power specs on UK power supplies, here's the deal.
On the bottom of my device reads: 16VAC 500ma So I believe that I need a 16V adapter. Thing is I can't remember if the UK power grid is AC. I think it is so in that case I want to avoid the ~ symbol on PSU's that converts from AC to DC. What's not clear is whether this would do the job: http://www.redstore.com/TARNOT196 or this: http://cgi.ebay.co.uk/ws/eBayISAPI.dll?ViewItem&ih=004&sspagename=STRK%3AMEWA%3AIT&viewitem=&item=140054294412&rd=1&rd=1 Alternatively I will try to find a 9v and a 7v AC adapter and wire them together, which I believe should work as they're generally on the same frequency. |
|