# Convert Nokia charger output form DC to AC

Discussion in 'General Electronics Chat' started by Aaditya0803, Dec 23, 2011.

1. ### Aaditya0803 Thread Starter New Member

Dec 23, 2011
1
0
Hi..

I have Nokia AC-8N charger

which provide DC output... bt i need AC output. by keeping curent and voltage as before.
so my question is that

" HOW CAN I CONVERT DC OUTPUT TO AC BY REMAINING CURRENT AND VOLTAGE AS BEFORE in Nokia AC-8N charger ?? "

2. ### spinnaker AAC Fanatic!

Oct 29, 2009
5,115
1,195
You are talking about overunity and that is banned here. There is going to be loss converting back to AC.

My question is: Why would you want to convert AC to DC then back to AC again???

just get an appropriate transformer.

3. ### tom66 Senior Member

May 9, 2009
2,613
214
Well technically it's unity but yeah 100% efficiency would be very difficult to achieve...

4. ### BershaM Member

Aug 22, 2011
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why is unity/over unity banned??

5. ### KJ6EAD Senior Member

Apr 30, 2011
1,426
364

Actually it would be impossible to achieve.

6. ### KJ6EAD Senior Member

Apr 30, 2011
1,426
364

Because it's a huge waste of time and it draws in the kooky pseudo-science nutters.

7. ### tom66 Senior Member

May 9, 2009
2,613
214
A room heater might be considered nearly unity efficiency, as it converts all incoming electrical energy to heat, either directly in the element or indirectly, for example from the light turning into heat. Of course that doesn't include transmission losses, generating power etc. but this is a closed system example.

8. ### Papabravo Expert

Feb 24, 2006
10,340
1,850
But a reasonable goal would be 80%. So you can have from a DC source a range of current and voltage combinations that equal 80% of the DC input power. If the AC output also needs to be a pure sine wave then that will increase the degree of difficulty.

9. ### spinnaker AAC Fanatic!

Oct 29, 2009
5,115
1,195
The question still stands: Why on earth would you convert AC to DC then back to AC again?

10. ### Adjuster Well-Known Member

Dec 26, 2010
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One might imagine some sensible reasons for wanting to do this - such as obtaining AC at a different frequency from the input, or providing a battery backed up supply.

That said, my guess would be that the OP just wants AC, and is unaware that converting DC back to AC is likely to be more expensive and less efficient than getting a suitable transformer. I suspect we will never know though...

11. ### spinnaker AAC Fanatic!

Oct 29, 2009
5,115
1,195
You can say that again. Another one post wonder.

Maybe it is another homework project? I can see how this might be an interesting assignment though not really possible as defined.