Re: using breadboards

wow. That sounds like a lot of fun.
I really wish I had a teacher that would do that sort of stuff, or even one 
that would get that involved.
I love to learn, it's just finding the money to do it with, and the people to 
teach me, or to invest the time in to something like that.

  ----- Original Message ----- 
  From: Dale Leavens 
  To: programmingblind@xxxxxxxxxxxxx 
  Sent: Sunday, February 22, 2009 5:25 PM
  Subject: Re: using breadboards


  Our amateur radio club back when I lived in Dawson Creek used the high school 
physics lab. The teacher more or less hosted our meetings there in the very 
early 80s. We used to make our own printed circuit boards by carefully drawing 
on boards which were copper on each side sandwiching a insulating fiber board. 
It was a sort of grease pencil drawing including the little dots where the pins 
from chips were to penetrate the board and where resisters, capacitors, diodes 
and transistors and other components were to be sited and connected. The board 
would then be submerged in an acid bath and the copper eaten away except where 
the drawing protected it unless of course it was left in too long. There were a 
few really little drill presses for drilling out the holes for the chips or the 
chip sockets. It took some planning to lay out a board since the only way to 
have conductors cross was to either solder in a bridge of wire or to put those 
parts of the circuit on the other side of the board but where it wouldn't 
interfere with the components mounted on that side.

  We even had a sheet metal break and guillotine for making metal boxes to hold 
our creations. I created a frequency oscillator to help accurately locate 
locations on the Armature bands using the color burst crystal from a television 
and what was at the time pretty new technology, the NE 555 timer chip. I had 
someone else draw out the circuit board and drill out the mounting 
holes.Shortly into its use however something seriously went wrong with the 
crystal oscillator and the unit went belly up.



    ----- Original Message ----- 
    From: Ken Perry 
    To: programmingblind@xxxxxxxxxxxxx 
    Sent: Sunday, February 22, 2009 6:51 PM
    Subject: RE: using breadboards


    Components that are small and when I say small some transistors and 
resisters are the size of a Braille dot.  A chip might be the size of the size 
of a pencil eraser and have 20 leads or one that has 100 leads is still smaller 
than a stamp and only a little thicker.  You use wax or a sticky stuff to stick 
it to the board while you line up the legs.  Once you line up the legs you 
don't' exactly Sauder like you do normal soldering you kind of heat up the 
component and let the Sauder stick to it.  Every device you use now has flat 
packs like cell phones to even the pac mate and Braille plus.   Things just 
keep getting smaller

     

    Ken

     

    From: programmingblind-bounce@xxxxxxxxxxxxx 
[mailto:programmingblind-bounce@xxxxxxxxxxxxx] On Behalf Of Bryan Schulz
    Sent: Sunday, February 22, 2009 6:22 PM
    To: programmingblind@xxxxxxxxxxxxx
    Subject: Re: using breadboards

     

    what are flat pack parts?

     

    Bryan Schulz
    The BEST Solution
    www.best-acts.com

      ----- Original Message ----- 

      From: Ken Perry 

      To: programmingblind@xxxxxxxxxxxxx 

      Sent: Sunday, February 22, 2009 4:36 PM

      Subject: RE: using breadboards

       

       

      Well soldering blind can be done with the larger components but just get 
your first flat pack set and try to line up all those little legs and if you're 
not using flat pack components now days you're in the dark ages.

       

      Ken 

       

      From: programmingblind-bounce@xxxxxxxxxxxxx 
[mailto:programmingblind-bounce@xxxxxxxxxxxxx] On Behalf Of Bob Kennedy
      Sent: Sunday, February 22, 2009 4:19 PM
      To: programmingblind@xxxxxxxxxxxxx
      Subject: Re: using breadboards

       

      Good points Ken.  And the problem with soldering blind?  I know it can be 
done, I do it quite often.  But not in such tight places or where heat can 
destroy something.  But I'll never be the one to say it can't be done.  

       

      If you figure out color coding make sure to share it?  Unless it's having 
someone tell you the colors...  

        ----- Original Message ----- 

        From: Ken Perry 

        To: programmingblind@xxxxxxxxxxxxxx 

        Sent: Sunday, February 22, 2009 4:07 PM

        Subject: RE: using breadboards

         

         

        Ok Tylor this is what I did in the military before I lost my site.  I 
am going to only say this once and people can jump on me all they want.  You 
are wasting your time.   When it comes to coding I was willing to help if your 
thinking of building your own circuit boards blind you are just plain wasting 
your time.  I am not saying doing it is impossible I am saying doing it is a 
waste of time.  Let me say it one more time. Waste of time.  If you want to 
design some small device that is fine use the single board development kits 
that are out there that come with everything you need on a single board and 
just code for it.  Then once you have a product developed on that board you pay 
a large company that does this to pair your device down to what you need.  

         

        You said you understand polarity that is great do you understand pnp 
transistors, logic chips, can you look at them and tell which side the positive 
goes on?  Can you look at a resister and tell the color coding without help?  
Can you read the chips codes and tell what they are can you see which direction 
has the power pins on it?  You will blow up more components than it's worth and 
when you get right down to it you will be able to do only the most simple 
circuits blind with a bread board.  So you will be able to design almost 
nothing for a cost of a lot of hours.  Sure you will learn something but the 
question is is it a good expenditure of your time? 

         

        You could spend $274 on a single board development kit and have 
something working tomorrow.  Something that has already went through the 
testing for power supplies and electric signal interference.  Whereas what you 
would build on a bread board might just make good smoke the first 90 times.

         

        Ken

        Ken   

         

        From: programmingblind-bounce@xxxxxxxxxxxxx 
[mailto:programmingblind-bounce@xxxxxxxxxxxxx] On Behalf Of Tyler Littlefield
        Sent: Sunday, February 22, 2009 3:06 PM
        To: programmingblind@xxxxxxxxxxxxx
        Subject: using breadboards

         

        Hello,

        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 
good.

        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 want.

        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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