Re: using breadboards

  • From: "The Elf" <inthaneelf@xxxxxxxxxxxxxx>
  • To: <programmingblind@xxxxxxxxxxxxx>
  • Date: Wed, 25 Feb 2009 00:19:37 -0800

alright, will do if I have any troubles

----- Original Message ----- From: "Ken Perry" <whistler@xxxxxxxxxxxxx>
To: <programmingblind@xxxxxxxxxxxxx>
Sent: Tuesday, February 24, 2009 12:42 PM
Subject: RE: using breadboards

It's hard to order but if you can't find one ask me and I can get my kids to
pick one up at radio shack or the source in BC since  that's where it is
made.  I have had one for a year and love it.


-----Original Message-----
From: programmingblind-bounce@xxxxxxxxxxxxx
[mailto:programmingblind-bounce@xxxxxxxxxxxxx] On Behalf Of The Elf
Sent: Tuesday, February 24, 2009 2:40 PM
To: programmingblind@xxxxxxxxxxxxx
Subject: Re: using breadboards

yeah hoo, thanks for the multi meter link, having worked in modular
electronics, auto mechanics, and as a handyman, I'm used to doing this stuff

on my own, and miss not being able to check the readings for myself!

take care,
----- Original Message ----- From: "Trouble" <trouble1@xxxxxxxxxxxxxxx>
To: <programmingblind@xxxxxxxxxxxxx>
Sent: Monday, February 23, 2009 8:10 AM
Subject: Re: using breadboards

Another place for parts is electronic things people don't want. lots of
transformers, and other goodies.
if your going to play with this stuff you might want to check into a
talking multimeter tester. it can help find out if parts are worth keeping

and witch way they fit.
The Nexxtech talking multimeter is available from a place
called KMS Tools in Canada. Their web site is
and the multimeter is listed under "automotive tools". They will ship to
US and Canada, but we are not sure if they will ship to other countries.
total cost of the multimeter, including shipping, is approximately $45 to
USA addresses.

At 09:57 AM 2/23/2009, you wrote:
I can handle building the laptop, I think. Getting all those parts in
where they go is a nice pain in the ass, though.
I had to switch out the motherboard on my gateway computer, that provided
for an interesting experience. :)
Thanks for the links though, I"ll check them out.

----- Original Message ----- From: "Trouble" <trouble1@xxxxxxxxxxxxxxx>
To: <programmingblind@xxxxxxxxxxxxx>
Sent: Monday, February 23, 2009 7:56 AM
Subject: Re: using breadboards

here are a few sites that might give you some interesting reading,
build your own laptop:
how stuff works:

At 04:43 PM 2/22/2009, you wrote:
I figured I was totally scrued up.
It's just something I want to do.
I have an idea for a PDA I would like to build that sounds fun, just my
personal little PDA. I could totally customize it, and it would be
cheaper than anything I could buy more than likely.
I also want to just learn how these things work. I've often found them
I have been digging around for some electronics tutorials, but haven't
found all that much that doesn't consist of a ton of pictures, etc etc.

----- Original Message -----
From: <mailto:inthaneelf@xxxxxxxxxxxxxx>The Elf
Sent: Sunday, February 22, 2009 2:34 PM
Subject: Re: using breadboards

lol, odd list to send this to, but I used to do modular electronics, so
your in luck.

firstly, that setup will not do the job, you need to find a basic
electronics tutorial and read it, smile, not ragging on you, just the

there are basic principles that you haven't grasped yet.

for a battery charger, you need the 110 volt (wall) plug, a transformer,

you need a full  wave rectifier (I'll explain in a minute) and you may
want some filter capacitors, though there not really needed for a bat

now then, your first mistake is that your setup would have put wall type

current, called AC for alternating current, into resisters and batteries

which are DC (direct current) devices , that's a large shocking flam
buoy recipe.
number two, you said resisters to bring the current down, yes resisters
will drop current, but not in the way you need it to, this kind and type

of current step down is done with a transformer (that's why so many
things with removable wall plugs have that large box either at the wall
end, or in the middle of the cord, the box is mostly the transformer
that reduces the voltage and changes the amperage of the wall current.
and without the full or half wave bridge rectifier I mentioned before,

your still plugging DC parts into an ac circuit, another flam buoy!
the full wave bridge rectifier I have been mentioning is the component
that changes the AC current coming out of the transformer into DC
current for the batteries to charge off of.

here is the correct series of components for a simple power supply:

1. 110 volt power plug, which you attach to a specific set of contacts
on a 110 AC to... (output voltage equals the number of batteries going
into the battery holder, times 1.5 volts) so if you have a battery clip
for 2 batteries, then its 3 volts, if its four then it's six volts) AC
transformer (note here, all the transformer does is change the voltage
and amperage of the power, not its type, at this point you still have AC

current running through the thing).
3. to the output side of the transformer you attach the input leads off
the  full wave bridge rectifier (this is the device that changes the
power from AC, to DC so its the same type of current as your batteries).
4. to the output side of the FWBR you can either:
4-1. insert two filter capacitors to screen out noise the circuitry
generates, but this is not needed in a simple charger(*note,! the filter

capacitors have to be hooked up the correct way, one end is positive one

4-2. attach your battery holder, making sure you get the polarity of the

wires correct to the battery holder , or your making a loud bang and a
lot of stink and a hazard out of your batteries.

another point, this simple setup has no way, like many chargers you buy
do now a days, to tell when the batteries are fully charged, and stop
trying to charge them, and this will heat up, and eventually give you
another ka boom.

the circuitry for a regulator is not to hard, but I can't pull it out of

my head like I can a simple power supply.

that is the basics of a power supply and it will work as a charger. and
it will not cost much, but why reinvent the wheel, unless your going to
try for some work in the electronics field? which I would not advise,
some of the stuff is extremely complex, and some of it quite delicate,
and none of it is marked in a method that can be  read with our current
tech abilities.

----- Original Message -----
From: <mailto:tyler@xxxxxxxxxxxxx>Tyler Littlefield
Sent: Sunday, February 22, 2009 12:06 PM
Subject: using breadboards

I'm looking to start using breadboards to create some small things.
I'd like to start off with something small, possibly a battery charger
or something similar.
I found a small tutorial on instructables, but not totally sure how to
get going.
It explained how things work somewhat, but not accurately enough for me.
It mainly used pictures to explain, which didn't do me a whole lot of
Any ideas on how I can set this up?
I understand the polarity--hooking one negative end to the positive etc
so that the circuit forms a loop, I'm just not sure how to do what I
So, here's my idea.
If I figure out the layout, I can set up a power cable going from the
outlet to the breadboard.
Then I can place in jumpers to bridge the gap.
I can take the 120 volts down to 9 with some resisters (?) and hook a
battery pack to the other end that will charge the batteries.
I'm thinking I'm way off, but... ideas would be great.
If I could, I'd like to set it up so it'd charge like 4 at once, then I
could cut down the 120 to 36. Possibly put in a heat sink to keep it
from getting really hot.

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