Subject:
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Re: 18 V Converter--was Re: Who here remembers...
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Newsgroups:
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lugnet.org.ca.rtltoronto
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Date:
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Thu, 28 Nov 2002 20:36:10 GMT
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Viewed:
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1853 times
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David Koudys wrote:
>
> In lugnet.org.ca.rtltoronto, David Koudys writes:
<snip>
> As you may have noticed, the 2x6 brick or plate is only for building on--you
> don't really need it, but it helps to have a foundation upon which to build.
>
> If you are like me, your battery box wire connector is usually connected so
> that the wire goes straight out, as in directly away from the push buttons.
> If this is the case, then the battery box switches on both boxes should be
> turned on the same way--i.e. both switches pressed on the left side, or both
> switches pressed on the right side. If you're worried, get yourself a
> little voltmeter from Radioshack and check the voltages.
>
> For non ascii pictures of this mess, see my website later tonite
>
> Oh one more thing--I have no idea if someone else has done this--I was so
> thrilled when I reduced the 18v converter to this--but if someone else has
> already done this, nicely done!
>
> Dave K.
And, of course, I'd observe that if you build two of these, you can use
them both as inputs to a 36v system, etc.
Basically, if you have N battery boxes, and 3N+1 wires, you can go as
far as you like with this. Until the wires melt.
But hey! I just thought of something:
If you use the smaller 9v boxes you can do this:
Put them nose to nose. I've arbitrarily assigned + and -, but they will
be opposite because of the geometry:
_______________________________
|. . . . . . . .|. . . . . . . .|
| | |
+|H . b b b b b b|B B B B B B . H|-
| | |
-|H . b b b b b b|B B B B B B . H|+
| | |
|. . . . . . . .|. . . . . . . .|
---------------------------------
Add a single wire which loops back on itself like this. Note that on
the left-hand battery box it overlaps two non-conductive studs. If you
fail to do this, it shorts. The other end doesn't matter so much, so
long as you get the orientation right.
A
___I___________________________
|. .I. . . . . .|. . . . . . . .|
| I | |
+|H OIO b b b b b|B B O O B B . H|-
| | ============A
-|H O O b b b b b|B B O O B B . H|+
| | |
|. . . . . . . .|. . . . . . . .|
---------------------------------
Add the 18v output wire spanning the two boxes:
A 18v
___I___________I_______________
|. .I. . . . . .I. . . . . . . .|
| I I |
+|H OIO b b b b oIo B O O B B . H|-
| ============A
-|H O O b b b b o o B O O B B . H|+
| | |
|. . . . . . . .|. . . . . . . .|
---------------------------------
Or, alternatively... use a 2x4 electrical plate like this:
A
___I___________________________
|. .I. . . . .|o o|. . . . . . .|
| I | | |
+|H OIO b b b b|o o|B O O B B . H|-
| | | ============A
-|H O O b b b b|o o|B O O B B . H|+
| | | |
|. . . . . . .|o o|. . . . . . .|
---------------------------------
And then you can do exactly the same trick to merge 4 boxes... but you
can't do 8 as easily.
If you need more than 36v, of course, use Dave's method.
Wires required: For 2 boxes: 2, For 4 boxes: 3 + 2 plates. And you
can't accidentally turn the box on the wrong way.
CAVEAT: This was sketched on paper. Check your work. Or don't do this
at all. I *think* it ought to work, but I haven't built it....
Jeff E
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Message is in Reply To:
 | | 18 V Converter--was Re: Who here remembers...
|
| In lugnet.org.ca.rtltoronto, David Koudys writes: <snip> (...) Arrrhgghhhhh!!! My FTP server isn't working and I'm stuck at work!!!! Grrr!!!!!! I have absolutely *huge* news and I can't upload pics!!!! So when I get home tonite, I upload then... (...) (24 years ago, 28-Nov-02, to lugnet.org.ca.rtltoronto)
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