# convert 0.12 vac to dc

Discussion in 'The Projects Forum' started by madhusuthanan, Sep 1, 2012.

May 30, 2012
5
0
hi all,
I've current transformer(CT) which has 0.24VAC @ 4A & 0.12VAC @ 2A. I need to convert it to nice DC. can any one help me?

Nov 30, 2010
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3. ### wayneh Expert

Sep 9, 2010
15,240
5,577
Are you wanting to power something, or just amplify and/or measure a voltage?

4. ### DickCappels Moderator

Aug 21, 2008
5,070
1,551
I guess to add to that, if you want to convert it to measure it, what do you want to know about it?

A. Peak value
B. Peak-to-Peak
C. Average
D. RMS

5. ### SgtWookie Expert

Jul 17, 2007
22,202
1,793
It would be helpful to know what the frequency of your AC is.
If it's 47Hz to 63Hz (typical range for mains power) then you'll need larger filter caps than for higher frequencies.

A precision rectifier will convert the AC to rippled DC.
You need to define what you mean by "nice".

6. ### Manish Anand New Member

Jun 13, 2011
5
0
Since the AC magnitude is low first you can use a voltage multiplier [Cascade connection of voltage doublers]circuit to convert this low magnitude AC into DC.

7. ### crutschow Expert

Mar 14, 2008
20,539
5,819
A voltage doubler circuit won't work for 0.24v which is below a diode drop.

#12 likes this.
8. ### #12 Expert

Nov 30, 2010
18,093
9,683
The, "Thanks" is for saving me the time it would take to type that answer.

This is beginning to look like a drive-by question.