Alt-BEAM Archive

Message #09181



To: beam mailing list =
From: David Perry =
Date: Fri, 14 Jan 2000 21:26:54 +1300
Subject: pricing and design specs for modular nv



Okay after working all day (in this bloody 35 degree heat wave) i have co=
me 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 des=
igned to give bias, you can adjust the pot to the value you want (0 ohms if=
you want) then you use the two pins to add whatever bias you want, also ha=
ndy 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 join the =
resistor to ground. =

=

Jumper B has three headers. The first is to connect your output to (moto=
r 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 p=
rovides power from the previous neuron. It also gives the output from the p=
revious 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 aux=
illary to add more functionality, use your imagination on just how to use i=
t (bias, sensors, data bus).
=

The 'board out' connector (female) is pretty self explanatory. It has two=
power connectors to pass power to the next neuron. Also has the output fro=
m 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. Pow=
er only has to be provided to one neuron, which could be done by soldering =
wires onto the power pads, or i could add connector (but theres enough alre=
ady).
=

The whole thing would be surface mounted to a small PCB, in the shape of =
a triangle of hexagon. That means that eventually cables will be required o=
r connectors used on multiple sides of the PCB. You could also have blank c=
onnector boards but that just adds to cost and complexity.
=

What do you think?
=

David


content-transfer-encoding: quoted-printable




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


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

com>David =

Perry

To: .sgi.com" =

title=3Dbeam@sgiblab.sgi.com>beam mailing list

Sent: Friday, January 14, 2000 7:0=
5 =

PM

Subject: pricing and design specs =
for =

modular nv



Okay after working all day (in this b=
loody 35 =

degree heat wave) i have 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 ga=
te 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 tha=
n i =

expected, but i can get it lower using slightly different parts.
DIV>
 

It runs as a normal NV neuron but there are a few thi=
ngs, =

jumper A is designed to give bias, you can adjust the pot to the value yo=
u =

want (0 ohms if you want) then you use the two pins to add whatever bias =
you =

want, also handy cause you can just plug it in using a connector. When yo=
u =

aren't using the bias, set the pot to the value you want and use the jump=
er to =

join the resistor to ground. 

 

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

your output to (motor driver). The next two allow you to turn on or off t=
he =

LED.

 

The 'board in' Connector (male) is located on the sid=
e 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 spar=
e =

connector (which has a jumper) can be used for any cross board applicatio=
n, =

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 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 n=
ext. =

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 add connector (but theres=
=

enough already).

 

The whole thing would be surface mounted to a small P=
CB, in =

the shape of a triangle of hexagon. That means that eventually cables wil=
l be =

required or connectors used on multiple sides of the PCB. You could also =
have =

blank connector boards but that just adds to cost and complexity.
<=
/DIV>
 

What do you think?

 

David




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