Alt-BEAM Archive

Message #09201



To: beam mailing list =
From: David Perry =
Date: Friday, 14 January 2000 7:35
Subject: pricing and design specs for modular nv


=

Okay after working all day (in this bloody 35 degree heat wave) i h=
ave come up with some estimated pricing and designs.
=

First the pricing, this includes
PCB
SMD LED
SMD resistor
SMD pot (2 meg)
.22uf monolithic cap
nc7s14 fairchild tiny logic single gate scmitt inverter =

4 pin in connector
4 pin out connector
2 pin header
3 pin header
two 1 pin header
two jumpers.
=

The total cost comes to about $4.50 which is more than i expected, =
but i can get it lower using slightly different parts.
=

It runs as a normal NV neuron but there are a few things, jumper A =
is designed to give bias, you can adjust the pot to the value you want (0 o=
hms if you want) then you use the two pins to add whatever bias you want, a=
lso handy cause you can just plug it in using a connector. When you aren't =
using the bias, set the pot to the value you want and use the jumper to joi=
n the resistor to ground. =

=

Jumper B has three headers. The first is to connect your output to=
(motor driver). The next two allow you to turn on or off the LED.
=

The 'board in' Connector (male) is located on the side of the board=
, it provides power from the previous neuron. It also gives the output from=
the previous neuron to the input of the current one. The spare connector (=
which has a jumper) can be used for any cross board application, it's just =
an auxillary to add more functionality, use your imagination on just how to=
use it (bias, sensors, data bus).
=

The 'board out' connector (female) is pretty self explanatory. It h=
as two power connectors to pass power to the next neuron. Also has the outp=
ut from the current neuron to give to the input of the next. The spare conn=
ector is the same as above.
=

Boards can either be connected directly side to side or with a cabl=
e. Power only has to be provided to one neuron, which could be done by sold=
ering wires onto the power pads, or i could add connector (but theres enoug=
h already).
=

The whole thing would be surface mounted to a small PCB, in the sha=
pe of a triangle of hexagon. That means that eventually cables will be requ=
ired or connectors used on multiple sides of the PCB. You could also have b=
lank connector boards but that just adds to cost and complexity.
=

What do you think?
=

David


content-transfer-encoding: quoted-printable





DOCTYPE HTML PUBLIC "-//W3C//DTD HTML 4.0 Transitional//EN">
x">
-----Original Message-----
<=
B>From: =

Seamus Allan <
href=3D"mailto:seamus_allan@ihotmail.com">seamus_allan@ihotmail.com
=
>
To: =

beam@sgiblab.sgi.com &l=
t;
href=3D"mailto:beam@sgiblab.sgi.com">beam@sgiblab.sgi.com
>
>Date: =

Friday, 14 January 2000 7:35
Subject: Re: pricing and des=
ign =

specs for modular nv


i think that idea of yours is seriousl=
y cool. =

for the connections you could use those little pin thingees (snap off p=
in =

headers), used in computer hardware for switches. you can get little pl=
ugs =

they fit into and small wires to go on them for longer connections. how=
big =

would the final board be??


style=3D"BORDER-LEFT: #000000 solid 2px; MARGIN-LEFT: 5px; MARGIN-RIGHT=
: 0px; PADDING-LEFT: 5px; PADDING-RIGHT: 0px">
----- Original Message -----


style=3D"BACKGROUND: #e4e4e4; FONT: 10pt arial; font-color: black">=
From: =


title=3Ddavidperry@geocities.com>David Perry

To:
href=3D"mailto:beam@sgiblab.sgi.com" title=3Dbeam@sgiblab.sgi.com>b=
eam =

mailing list

Sent: Friday, January 14, 20=
00 7:05 =

PM

Subject: pricing and design =
specs =

for modular nv



Okay after working all day (in =
this =

bloody 35 degree heat wave) i have come up with some estimated pric=
ing =

and designs.

 

First the pricing, this includes

PCB

SMD LED

SMD resistor

SMD pot (2 meg)

.22uf monolithic cap V>
nc7s14 fairchild tiny logic sin=
gle gate =

scmitt inverter

4 pin in connector

4 pin out connector >
2 pin header

3 pin header

two 1 pin header

two jumpers.

 

The total cost comes to about $4.50 which is mo=
re than =

i expected, but i can get it lower using slightly different =

parts.

 

It runs as a normal NV neuron but there are a f=
ew =

things, jumper A is designed to give bias, you can adjust the pot t=
o the =

value you want (0 ohms if you want) then you use the two pins to ad=
d =

whatever bias you want, also handy cause you can just plug it in us=
ing a =

connector. When you aren't using the bias, set the pot to the value=
you =

want and use the jumper to join the resistor to =

ground. 

 

 Jumper B has three headers. The first is =
to =

connect your output to (motor driver). The next two allow you to tu=
rn on =

or off the LED.

 

The 'board in' Connector (male) is located on t=
he side =

of the board, it provides power from the previous neuron. It also g=
ives =

the output from the previous neuron to the input of the current one=
. The =

spare connector (which has a jumper) can be used for any cross boar=
d =

application, it's just an auxillary to add more functionality, use =
your =

imagination on just how to use it (bias, sensors, data =

bus).

 

The 'board out' connector (female) is pretty se=
lf =

explanatory. It has two power connectors to pass power to the next =

neuron. Also has the output from the current neuron to give to the =
input =

of the next. The spare connector is the same as above.

 

Boards can either be connected directly side to=
side =

or with a cable. Power only has to be provided to one neuron, which=
=

could be done by soldering wires onto the power pads, or i could ad=
d =

connector (but theres enough already).

 

The whole thing would be surface mounted to a s=
mall =

PCB, in the shape of a triangle of hexagon. That means that eventua=
lly =

cables will be required or connectors used on multiple sides of the=
PCB. =

You could also have blank connector boards but that just adds to co=
st =

and complexity.

 

What do you think?

 

David




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