# AC to DC conversion question

#### Have a question or want to show off your project? Post it! No Registration Necessary.  Now with pictures!

•  Subject
• Author
• Posted on
Hi,

heres my dilema,  I have a AC 12 V source which I need to convert to
about.......lets say, DC 5 volts I guess.

Anyone know how I can do this

Re: AC to DC conversion question
How much current?

Re: AC to DC conversion question
ok maybe 20 - 50 mA?

Re: AC to DC conversion question
pgs8113@hotmail.com wrote on 11/14/03 3:57 PM:

certainly

Re: AC to DC conversion question
Few diodes, capacitor and a voltage regulator is all it takes.

Re: AC to DC conversion question

Such a dilema (or even dilemma). Hmm.  Use the 12 V ac to boil water.
Collect the steam, direct into a piston engine.  Belt the engine to a
water pump.  Pump water up a hill to a large reservoir. Build a penstock
out of PVC pipe and direct it to a hydraulic turbine. Use the hydraulic
turbine to turn the shaft of a dc generator shaft.  Regulate the output
of the generator with a carbon-pile stack connected to its field. You
can make the elements from the carbon pile stack by cutting disks out of
the centre rod of a common No. 6 dry cell.

If anyone knows a simpler way to accomplish this, I challenge you to
describe it.

Bill

( a few parameters would make this more of a proper engineering
question.  Don't they sell those "101 Electronic Projects " books on
newstands for \$3 any more? )

Re: AC to DC conversion question

I can't believe you'd be so irresponsible... You've COMPLETELY forgetten
the most important stage: hamster turing it's wheel. Sad, just sad! :) TTYL

Re: AC to DC conversion question

forgetten
TTYL
Attach a fuel cell to your butt; connect the fuel cell to a rechargable
battery.  Every time you fart, the fuel cell produces current at the voltage
you wish and charges the battery...
tbh

Re: AC to DC conversion question

penstock
hydraulic
output
of
voltage

Now THAT is original! Finally a REASON to fart! :)

Re: AC to DC conversion question

Boy did you date yourself! I'll bet the youngsters out there never saw one
of those. They don't exactly fit into a portable MP3 player!

Ben Miller

--
Benjamin D. Miller, PE
B. MILLER ENGINEERING
We've slightly trimmed the long signature. Click to see the full one.
Re: No. 6 dry cells (AC to DC conversion question)
Ben Miller wrote:

I'm a youngster! (Well, 26 anyway).. and yes, I've never seen a No. 6
dry cell, but have heard of them. What exactly are they, and what are
(were?) they used in?

I'm only familiar with AA, AAA, C, D, N and the ever-handy
tongue-testable 9V. }:)

-Z

Re: No. 6 dry cells (AC to DC conversion question)

one
The were/are 1&1/2 volt dry cells about the size of a small thermos. Used
most often in groups for doorbell/call systems in old apt. bldgs. - larger
homes - etc., and other signaling uses. I have also seen (in the past) them
used for lighting infrequently used closets, and storage spaces in
combination with door switches.

They were also quite often used in training facilities for powering training
boards (switches, lights, and other devices) before low voltage power
supplies were commonly available.

I believe the chemistry was Zink Chloride?

Louis--*********************************************
Remove the two fish in address to respond

Re: No. 6 dry cells (AC to DC conversion question)
http://www.sizes.com/built/dry_cells.htm
--
John G

We've slightly trimmed the long signature. Click to see the full one.
Re: No. 6 dry cells (AC to DC conversion question)

See Eveready EN6 for "modern" #6 alkaline cell:
http://data.energizer.com/datasheets/library/primary/alkaline/energizer/industrial/en6.pdf
{listed as two paralleled OEM cells:
http://data.energizer.com/datasheets/library/primary/alkaline/energizer/oem_only/3361.pdf }

--s falke

Re: AC to DC conversion question
A set of No. 6 cells would run your MP3 player for a long long time.  I
once had a bunch of these for use with telephones - though of course not
telephones connected to the phone company.

A few weeks ago it occured to me that the portable set playing quietly
in the corner of my home office was possibly the first time my nephews
and nieces had ever seen a black-and-white TV.

To prove your antiquity, what are these: 50C5, 35W4, 12AU6,6BE6, 12AV6.

Bill

out of
one

Re: AC to DC conversion question
To prove your antiquity, what are these: 50C5, 35W4, 12AU6,6BE6, 12AV6.

Those are modern vacuum tubes from an "all american five" radio circuit. I
restore sets that used some of the earliest ones.

Ben Miller

--
Benjamin D. Miller, PE
B. MILLER ENGINEERING
We've slightly trimmed the long signature. Click to see the full one.
Re: AC to DC conversion question

Sure your handle isn't Rube Goldberg???

Re: AC to DC conversion question
AC/DC.....I always loved that band!

Re: AC to DC conversion question
Do you school work yourself!  If you do not pay attention in class, how do
you expect to make it in the real world?!?