HDD -Motor ---> LEDs

[Watson A.Name - \"Watt Su]

I pulled a spindle motor out of an old HDD, and it has four gold plated
spots on a piece of flexible PC Bd glued to the surface that faces
outside. I measure about 4 ohms between any 3 of the spots, and about 2
ohms between the three and the 4th spot (the DMM isn't very accurate at
those low ohms readings). These lead me to believe that I've got the
classic three phase windings.

It has permanent magnets so when I spin it, a LED across any 2 of the 3
spots will light up. Coooool.

Now, should I connect the diodes up in wye or delta? I've been doing it
delta. I think I'll use the LEDs anti-parallel, without the rectifiers.
But if i do use rectifiers, should I use schottkys? Thanks.

--
@@F@r@o@m@@O@r@a@n@g@e@@C@o@u@n@t@y@,@@C@a@l@,@@w@h@e@r@e@@
###Got a Question about ELECTRONICS? Check HERE First:###
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Don't be ripped off by the big book dealers. Go to the URL
that will give you a choice and save you money(up to half).
http://www.everybookstore.com You'll be glad you did!
Just when you thought you had all this figured out, the gov't
changed it: http://physics.nist.gov/cuu/Units/binary.html
@@t@h@e@@a@f@f@l@u@e@n@t@@m@e@e@t@@t@h@e@@E@f@f@l@u@e@n@t@@

 

[Watson A.Name - \"Watt Su]

"Oppie" <boppie@-nospam-ludl.com> wrote in message
news:9dqid.2265$Fk7.1578@sam.nntpserver.com...

Sounds like the motor is connected in 3 phase Y with the common also
brought
out (for unipolar drive).
If you want to use it as a generator, ignore the center tap and
connect
diodes to each of the legs. Six diodes total - each leg connects to a
diode
cathode and anodes all connected to ground, each leg connects to
cathode and
anodes tied together to +. Just like an automobile alternator.

Eh? Anodes to +???

Schottky diodes would help.

I used to have a 12V rated bipolar step motor that I connected similar
to
this and added a crank to spin it. made a nice emergency flashlight. I
worked in the center of the building and the emergency lights were a
bit
unreliable in the occasional blackout.

Yeah, I found this:
http://www.siliconchip.com.au/cms/A_100638/article.html
But I think it will take a lot faster turning than a hand crank to make
this one light 'em up. They recommend super capacitors for storing the
current vur I don't see how that will help much. The turkey 'Forever
Flashlight' i bought has a super cap, and it glows brightly as long as
is't being shaken, but runs poorly off the cap alone. It's just another
poorly perfoming product, just like this "2 in 1 stripper cutter" I
bought at the hardware store. I got it home and found that it also
strips some of the strands of the 22 AWG wire, along with the
insulation. Also the cutter sucks. It basically just sucks! So I took
it back to get my money back, and they told me that there's a sign on
the tool cage that says, "no refunds on tools". Sorrrry. Grrrr! >:-(

So I spent a couple rounds of emails getting the custoner service person
to believe me that it was defective. They're supposed to send another
to me shortly, but I think I'll just be stuck with _two_ pieces of crap.
Try www.innovativetools.net if you want to see the turkey, but just
don't buy one!

We now return you to your regularly scheduled programming....

"Watson A.Name - "Watt Sun, the Dark Remover"" <NOSPAM@dslextreme.com
wrote
in message news:10ojtugl0vpq7b3@corp.supernews.com...
I pulled a spindle motor out of an old HDD, and it has four gold
plated
spots on a piece of flexible PC Bd glued to the surface that faces
outside. I measure about 4 ohms between any 3 of the spots, and
about 2
ohms between the three and the 4th spot (the DMM isn't very accurate
at
those low ohms readings). These lead me to believe that I've got
the
classic three phase windings.

It has permanent magnets so when I spin it, a LED across any 2 of
the 3
spots will light up. Coooool.

Now, should I connect the diodes up in wye or delta? I've been
doing it
delta. I think I'll use the LEDs anti-parallel, without the
rectifiers.
But if i do use rectifiers, should I use schottkys? Thanks.

--
@@F@r@o@m@@O@r@a@n@g@e@@C@o@u@n@t@y@,@@C@a@l@,@@w@h@e@r@e@@
###Got a Question about ELECTRONICS? Check HERE First:###
http://users.pandora.be/educypedia/electronics/databank.htm
My email address is whitelisted. *All* email sent to it
goes directly to the trash unless you add NOSPAM in the
Subject: line with other stuff. alondra101 <at> hotmail.com
Don't be ripped off by the big book dealers. Go to the URL
that will give you a choice and save you money(up to half).
http://www.everybookstore.com You'll be glad you did!
Just when you thought you had all this figured out, the gov't
changed it: http://physics.nist.gov/cuu/Units/binary.html
@@t@h@e@@a@f@f@l@u@e@n@t@@m@e@e@t@@t@h@e@@E@f@f@l@u@e@n@t@@

 

[DAW]

You must have the coolest junk box...but what is the point of your
questions? what is the objective? Or am I being too pragmatic here?

"Watson A.Name - "Watt Sun, the Dark Remover"" <NOSPAM@dslextreme.com> wrote
in message news:10ojtugl0vpq7b3@corp.supernews.com...

I pulled a spindle motor out of an old HDD, and it has four gold plated
spots on a piece of flexible PC Bd glued to the surface that faces
outside. I measure about 4 ohms between any 3 of the spots, and about 2
ohms between the three and the 4th spot (the DMM isn't very accurate at
those low ohms readings). These lead me to believe that I've got the
classic three phase windings.

It has permanent magnets so when I spin it, a LED across any 2 of the 3
spots will light up. Coooool.

Now, should I connect the diodes up in wye or delta? I've been doing it
delta. I think I'll use the LEDs anti-parallel, without the rectifiers.
But if i do use rectifiers, should I use schottkys? Thanks.

--
@@F@r@o@m@@O@r@a@n@g@e@@C@o@u@n@t@y@,@@C@a@l@,@@w@h@e@r@e@@
###Got a Question about ELECTRONICS? Check HERE First:###
http://users.pandora.be/educypedia/electronics/databank.htm
My email address is whitelisted. *All* email sent to it
goes directly to the trash unless you add NOSPAM in the
Subject: line with other stuff. alondra101 <at> hotmail.com
Don't be ripped off by the big book dealers. Go to the URL
that will give you a choice and save you money(up to half).
http://www.everybookstore.com You'll be glad you did!
Just when you thought you had all this figured out, the gov't
changed it: http://physics.nist.gov/cuu/Units/binary.html
@@t@h@e@@a@f@f@l@u@e@n@t@@m@e@e@t@@t@h@e@@E@f@f@l@u@e@n@t@@

 

[Oppie]

Sounds like the motor is connected in 3 phase Y with the common also brought
out (for unipolar drive).
If you want to use it as a generator, ignore the center tap and connect
diodes to each of the legs. Six diodes total - each leg connects to a diode
cathode and anodes all connected to ground, each leg connects to cathode and
anodes tied together to +. Just like an automobile alternator.
Schottky diodes would help.

I used to have a 12V rated bipolar step motor that I connected similar to
this and added a crank to spin it. made a nice emergency flashlight. I
worked in the center of the building and the emergency lights were a bit
unreliable in the occasional blackout.

"Watson A.Name - "Watt Sun, the Dark Remover"" <NOSPAM@dslextreme.com> wrote
in message news:10ojtugl0vpq7b3@corp.supernews.com...

I pulled a spindle motor out of an old HDD, and it has four gold plated
spots on a piece of flexible PC Bd glued to the surface that faces
outside. I measure about 4 ohms between any 3 of the spots, and about 2
ohms between the three and the 4th spot (the DMM isn't very accurate at
those low ohms readings). These lead me to believe that I've got the
classic three phase windings.

It has permanent magnets so when I spin it, a LED across any 2 of the 3
spots will light up. Coooool.

Now, should I connect the diodes up in wye or delta? I've been doing it
delta. I think I'll use the LEDs anti-parallel, without the rectifiers.
But if i do use rectifiers, should I use schottkys? Thanks.

--
@@F@r@o@m@@O@r@a@n@g@e@@C@o@u@n@t@y@,@@C@a@l@,@@w@h@e@r@e@@
###Got a Question about ELECTRONICS? Check HERE First:###
http://users.pandora.be/educypedia/electronics/databank.htm
My email address is whitelisted. *All* email sent to it
goes directly to the trash unless you add NOSPAM in the
Subject: line with other stuff. alondra101 <at> hotmail.com
Don't be ripped off by the big book dealers. Go to the URL
that will give you a choice and save you money(up to half).
http://www.everybookstore.com You'll be glad you did!
Just when you thought you had all this figured out, the gov't
changed it: http://physics.nist.gov/cuu/Units/binary.html
@@t@h@e@@a@f@f@l@u@e@n@t@@m@e@e@t@@t@h@e@@E@f@f@l@u@e@n@t@@

 

[Oppie]

Couldn't read the article as I'm not a subscriber

The motor I used was a 1.8 degree step motor and hand cranking at about 2
rev/sec worked OK.
==========
"Watson A.Name - "Watt Sun, the Dark Remover"" <NOSPAM@dslextreme.com> wrote
in message news:10omu1ji301hbac@corp.supernews.com...

Yeah, I found this:
http://www.siliconchip.com.au/cms/A_100638/article.html
But I think it will take a lot faster turning than a hand crank to make
this one light 'em up. They recommend super capacitors for storing the
current vur I don't see how that will help much. The turkey 'Forever
Flashlight' i bought has a super cap, and it glows brightly as long as
is't being shaken, but runs poorly off the cap alone. It's just another
poorly perfoming product, just like this "2 in 1 stripper cutter" I
bought at the hardware store. I got it home and found that it also
strips some of the strands of the 22 AWG wire, along with the
insulation. Also the cutter sucks. It basically just sucks! So I took
it back to get my money back, and they told me that there's a sign on
the tool cage that says, "no refunds on tools". Sorrrry. Grrrr! >:-(

 

[Watson A.Name - \"Watt Su]

"Oppie" <boppie@-nospam-ludl.com> wrote in message
news:1099664587.EtVMLbTGo7otyNojG0WBtA@teranews...

Couldn't read the article as I'm not a subscriber

I'm not a subscriber, but maybe Google is, and Google can read them,
when you do a search. Search for Our Fantastic Human-Powered LED
Torches.

The motor I used was a 1.8 degree step motor and hand cranking at
about 2
rev/sec worked OK.

I used a door drive motor out of a defunct CD drive. What's nice is
that it has a gear train that must have a ratio of 40 to 1. So I can
easily spin the motor at a few hundred RPM. Problem ias that me fingers
become raw after a short time!

==========
"Watson A.Name - "Watt Sun, the Dark Remover"" <NOSPAM@dslextreme.com
wrote
in message news:10omu1ji301hbac@corp.supernews.com...
Yeah, I found this:
http://www.siliconchip.com.au/cms/A_100638/article.html
But I think it will take a lot faster turning than a hand crank to
make
this one light 'em up. They recommend super capacitors for storing
the
current vur I don't see how that will help much. The turkey
'Forever
Flashlight' i bought has a super cap, and it glows brightly as long
as
is't being shaken, but runs poorly off the cap alone.

 

[Watson A.Name - \"Watt Su]

"DAW" <davew@joink.com> wrote in message
news:cmh6i801jfc@enews3.newsguy.com...

You must have the coolest junk box...but what is the point of your
questions? what is the objective? Or am I being too pragmatic here?

The 'coolest junk box' is a scrapped 0.5GB hard disk from an old '486
PC. The neodymium whatever magnets make awesome refrigerator magnets,
or should I say file cabinet magnets. But here's what I said in the
other followup:

"[Google] Search for Our Fantastic Human-Powered LED Torches."

You shall then become aware of what can be done with a motor and a few
LEDs.

"Watson A.Name - "Watt Sun, the Dark Remover"" <NOSPAM@dslextreme.com
wrote
in message news:10ojtugl0vpq7b3@corp.supernews.com...
I pulled a spindle motor out of an old HDD, and it has four gold
plated
spots on a piece of flexible PC Bd glued to the surface that faces
outside. I measure about 4 ohms between any 3 of the spots, and
about 2
ohms between the three and the 4th spot (the DMM isn't very accurate
at
those low ohms readings). These lead me to believe that I've got
the
classic three phase windings.

It has permanent magnets so when I spin it, a LED across any 2 of
the 3
spots will light up. Coooool.

Now, should I connect the diodes up in wye or delta? I've been
doing it
delta. I think I'll use the LEDs anti-parallel, without the
rectifiers.
But if i do use rectifiers, should I use schottkys? Thanks.

--