Maker Pro
Maker Pro

OH BOY, HERE WE GO...

D

Dave

Jan 1, 1970
0
I would like to build a portable battery power supply for my portable
USB hard drive/CD/DVD enclosures.

Based on the cover of the normal power supply, it delivers: +5V/1.5A
and +12V/1.5A to the enclosure.

For size and performance, it was suggested I start with two 9.6V
1800mAh R/C type batteries.

I was told I should avoid the cheap, inefficient Radioshack type
voltage regulators as a good portion of energy is wasted as heat.
I was told I need the efficient stepping kind which start with a part #
of LN or LNB - if someone could provide those two part #'s that'd be
great.

I understand I need two of those regulators, to step up to +12V 1.5A
and of course one to step down to +5V 1.5A. Who knows if up to 1.5A is
actually drawn, but I want to have that capability. A 56X CD burner
doesn't burn out the plug-in supply.

Now I know I need some caps, resistors & other components, but my
knowledge is rudimentary so I have NO IDEA what I need, sorry...this is
a .basics posting.

With the help of a book, I could read a diagram and have the tools and
aptitude to build this thing, just coming up short on the components
knowledge.

Yes I know this is a simple project to some, but help greatly
appreciated.

Yes this was posted with Google, ports not open at work for newsreader.

Yes, you can save the flamemail about etiquette or knowledge, etc,
other comments for another day.

Thanks in advance,
D
 
D

Dave

Jan 1, 1970
0
OH, I would also like to have an undervolt lockout capability as I'm
sure a harddrive would not respond well.
 
J

John Bokma

Jan 1, 1970
0
Dave said:
I would like to build a portable battery power supply for my portable
USB hard drive/CD/DVD enclosures.

Now that would have been something to put in your subject, don't you think?
 
J

John Larkin

Jan 1, 1970
0
I would like to build a portable battery power supply for my portable
USB hard drive/CD/DVD enclosures.

Based on the cover of the normal power supply, it delivers: +5V/1.5A
and +12V/1.5A to the enclosure.

For size and performance, it was suggested I start with two 9.6V
1800mAh R/C type batteries.

I was told I should avoid the cheap, inefficient Radioshack type
voltage regulators as a good portion of energy is wasted as heat.
I was told I need the efficient stepping kind which start with a part #
of LN or LNB - if someone could provide those two part #'s that'd be
great.

I understand I need two of those regulators, to step up to +12V 1.5A
and of course one to step down to +5V 1.5A. Who knows if up to 1.5A is
actually drawn, but I want to have that capability. A 56X CD burner
doesn't burn out the plug-in supply.

Now I know I need some caps, resistors & other components, but my
knowledge is rudimentary so I have NO IDEA what I need, sorry...this is
a .basics posting.

With the help of a book, I could read a diagram and have the tools and
aptitude to build this thing, just coming up short on the components
knowledge.

Yes I know this is a simple project to some, but help greatly
appreciated.

Yes this was posted with Google, ports not open at work for newsreader.

Yes, you can save the flamemail about etiquette or knowledge, etc,
other comments for another day.

Thanks in advance,
D


Connect the batteries in series for about 18 volts. Then buy two
packaged 3-terminal buck switching regulator boards from Mouser or
Digikey, one for +5 and one for +12, about $15 each. You can't make it
out of parts for much less, and the Mouser things will work right out
the box.

Or sign up for engineering school.

John
 
D

Dave

Jan 1, 1970
0
no. That line would have been time better spent elsewhere.
 
J

John Bokma

Jan 1, 1970
0
Dave said:
no. That line would have been time better spent elsewhere.

Sure, and you just keep wondering why people ploink / ignore you.
 
R

Rich Grise

Jan 1, 1970
0
Yes this was posted with Google, ports not open at work for newsreader.

My primary complaint about googlegroupies is that they forget to include
any context when they reply (or followup). googlegroups by default
doesn't include any context, so you'll need to copy/paste the context
that you're replying to.

Good Luck!
Rich
 
D

Dave

Jan 1, 1970
0
Well, an answer already came... My subjects work everytime.
 
D

Dave

Jan 1, 1970
0
I know, and you're the way too smart, arrogant, nerd newsgroup police
who can't refuse the comment? Need a girlfriend? Not spending enough
time with the current one?
 
J

John Bokma

Jan 1, 1970
0
Dave said:
I know, and you're the way too smart, arrogant,

No, you got your feelings messing up your brain cells (all 4 of them)
again.
 
D

Dave

Jan 1, 1970
0
Having trouble letting go of trying to so how sarcastic and what a
smart technical monkey you are? I come here when I need something,
seems you post just to post; be it to comment on "newsgroup etiquette"
or subject lines...or whatever your narrow point of view leads you to
believe.

I'll let you have the last word, I know you can't resist showing off
your witty response - ego I suppose. Have at it son. I'll be back the
next time I need something.
 
J

John Bokma

Jan 1, 1970
0
Dave said:
your witty response - ego I suppose. Have at it son. I'll be back the
next time I need something.

Sure, and you probably are going to do that the "smart" way again. Look at
how other people compose their subjects. Who is the person with an ego
problem? Yup, *you*.

A subject is a subject, not a place to put an off topic "funny" sentence.
Try to give a short and exact description of your problem. More people who
can help you will read it.

You get help here for free. You are wasting the time of people who decide
to read your post, but can't help you. You mislead people.

So who is the person thinking he's a smartass? Yup, *you*.

Have you learned anything from this? I am sure no. Because of your
"little" ego problem.
 
D

Dave

Jan 1, 1970
0
Right, ego is a long winded response, or a lesson... You're trying so
hard to be right, and you have all the evidence in the world to be
right, that's ego.
 
D

Dave

Jan 1, 1970
0
I got what I wanted, my goal was fullfilled - I ALWAYS get help here
and will continue to do it my way, because it works me. YOu do what
works for you.

Talk about ego, you want me to do what works for YOU, why whould I?
There's no lesson from you, why would I take one from you? What have
you done that would enroll me to see your way except be sarcastic?

That's not enrolling... What's in it for me? Presented another way, I
might have considered. Is that you Andrew? Being a jerk is cracking
me up...

So, we can continue to slap cocks together, be right. That's fine.

"You get help here for free. You are wasting the time of people who
decide
to read your post, but can't help you. You mislead people."

Key word is "decide." Choice, you know what that means, right? You
did it, you should know, you chose to read it.

Does it irk you that I got a response right away? An actual
resolution? I bet it does.

*Your* words imply you covet this forum, and insist on compliance, yet
does continuing to slap cocks with me in this sci.electronics.basics
venue really in the spirit of this group? The hypocrisy.

It could be your trying to be right about it, because you're the monkey
that "decided" to read it. You didn't have to, but you did, you
decided. You had a choice, there's freedom in that don't you think?
You really didn't have to, but you did. So, you can be a baby about
your choice, or you can let it go. I doubt you can however, too much
ego.
 
J

John Bokma

Jan 1, 1970
0
Dave said:
Right, ego is a long winded response, or a lesson... You're trying so
hard to be right, and you have all the evidence in the world to be
right, that's ego.

No, that's being right. Trying to say that *you* did nothing wrong is just
being plain stupid.
 
J

John Bokma

Jan 1, 1970
0
Dave said:
I got what I wanted, my goal was fullfilled

and time of some people wasted. Did you pay them for your time?

If you had picked a good subject people could have read more selective.

Imagine that everybody here posts "Oh boy, Me needs help" etc subjects.
But wait, you are to stupid to understand my point, even after several
explanations.

Maybe instead of being a keyboard cowboy, and a Usenet hero you should
read this article and maybe, maybe you are able to learn... a lot...

http://www.catb.org/~esr/faqs/smart-questions.html

- I ALWAYS get help here
and will continue to do it my way, because it works me.

but it wastes time of other people. Do you pay them? No. Again, imagine
all people here posting stupid subjects and being a smart ass like you.

How readable does this group become then? Use your brain for a little
while.
Talk about ego, you want me to do what works for YOU, why whould I?

Because you need help smart pants.
There's no lesson from you,

The problem resides between the chair and the keyboard or in short:
*you*
why would I take one from you? What have
you done that would enroll me to see your way except be sarcastic?

Well, take it from this guy then:
http://www.catb.org/~esr/faqs/smart-questions.html

Or just look at the subjects in this group. How many are written by the
dumbest member of the Homer Simpson fanclub? Yup, one. It's yours.

[ idiot's rambling snipped for brevity ]
 
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