I'd have an interest in, as it's the only version I could breadboard and
use in chip sockets on PCBs.
> Subject:
> Re: pricing and design specs for modular nv
> Date:
> Sat, 15 Jan 2000 14:09:44 +1100
> From:
> "David Perry"
> Reply-To:
> beam@sgiblab.sgi.com
> To:
>
>
>
>
>
> thats what i plan on using, the final board would be pretty small, i'm aiming for a 3 x 3 x 3 triangle or smaller.
>
> David
>
> -----Original Message-----
> From: Seamus Allan
> To: beam@sgiblab.sgi.com
> Date: Friday, 14 January 2000 7:35
> Subject: Re: pricing and design specs for modular nv
>
> i think that idea of yours is seriously cool. for the connections you could use those little pin thingees (snap off pin headers), used in computer hardware for switches. you
> can get little plugs they fit into and small wires to go on them for longer connections. how big would the final board be??
>
> ----- Original Message -----
> From: David Perry
> To: beam mailing list
> Sent: Friday, January 14, 2000 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 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 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 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 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 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 add connector (but theres enough already).
>
> 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 or connectors used on
> multiple sides of the PCB. You could also have blank connector boards but that just adds to cost and complexity.
>
> What do you think?
>
> David
>
>
>
--
Richard Piotter The Richfiles Robotics & TI web page:
richfile@rconnect.com http://richfiles.calc.org
-- Make Money by Simply Surfing the Net or responding to E-Mail!!!
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9208 Sat, 15 Jan 2000 00:30:40 -0800 [alt-beam] Re: D1 beam@sgiblab.sgi.com Wilf Rigter
--------------AA71DD7E5DC4ADBCF2F7B101
content-transfer-encoding: 7bit
To avoid using the extra inverter to change the polarity, use the attached
SIMD1(a) circuit which is functionally identical to the SIMD1 except that the
Schmitt trigger output is high (V+) during charging and low (GND) when it gets
dark. Because the positive threshold is not symmetrical especially if using a
HCT14, the SIMD1(a) will turn on a little earlier in the evening.
regards
wilf
[Image]
JVernonM@aol.com wrote:
> In a message dated 1/14/00 6:52:29 PM Eastern Standard Time,
> Bumper314@aol.com writes:
>
> > ok...im looking at Wilfs solution here to the D1...and i feel stupid.I cant
> > see where to hook up the LED. it will run if I put in on the output + and
> -
> > listed but i thought he said it clicked over when the voltage of the solar
> > cell was 1/3 the voltage in the cap. Am i wrong here?
> >
> You may have your solar cell inputs wrong. I did the same thing and got a
> SIMD1 that comes on in light and snaps off in the dark. Make sure that your
> negative side of the circuit is hooked up straight to the cell and cap and
> inverter (this is where I screwed up, because most of these BEAM circuits
> switch on the negative side and have positive hooked straight). The positive
> side of the cell is hooked straight to the diode and the input of the
> inverter. The positive side of the diode (the side with the line) goes to the
> positive side of the cap and over to the inverter positive connection. The
> output of the inverter goes to the positive connection of your load (Pummer,
> Bicore, etc). If you want it to run like all other BEAM circuits, run the
> inverter output to another inverter input. The output of the second inverter
> will then be hooked to the negative rail of your load and positive is hooked
> up straight to cell and cap as usual. Hope this helps.
>
> See ya,
> Jim
> http://www.geocities.com/SoHo/Exhibit/8281/beamart.html
> ICQ# 55657870
--------------AA71DD7E5DC4ADBCF2F7B101
boundary="------------9E4F957257A48B32CB84F51B"
--------------9E4F957257A48B32CB84F51B
content-transfer-encoding: 7bit
To avoid using the extra inverter to change the polarity, use the attached
SIMD1(a) circuit which is functionally identical to the SIMD1 except that
the Schmitt trigger output is high (V+) during charging and low (GND) when
it gets dark. Because the positive threshold is not symmetrical especially
if using a HCT14, the SIMD1(a) will turn on a little earlier in the
evening.
regards
wilf
JVernonM@aol.com wrote:
In a message dated 1/14/00 6:52:29 PM Eastern Standard
Time,
Bumper314@aol.com writes:
> ok...im looking at Wilfs solution here to the D1...and i feel stupid.I
cant
> see where to hook up the LED. it will run if I put in on the
output + and
-
> listed but i thought he said it clicked over when the voltage
of the solar
> cell was 1/3 the voltage in the cap. Am i wrong here?
>
You may have your solar cell inputs wrong. I did the same thing and
got a
SIMD1 that comes on in light and snaps off in the dark. Make sure that
your
negative side of the circuit is hooked up straight to the cell and
cap and
inverter (this is where I screwed up, because most of these BEAM circuits
switch on the negative side and have positive hooked straight). The
positive
side of the cell is hooked straight to the diode and the input of the
inverter. The positive side of the diode (the side with the line) goes
to the
positive side of the cap and over to the inverter positive connection.
The
output of the inverter goes to the positive connection of your load
(Pummer,
Bicore, etc). If you want it to run like all other BEAM circuits, run
the
inverter output to another inverter input. The output of the second
inverter
will then be hooked to the negative rail of your load and positive
is hooked
up straight to cell and cap as usual. Hope this helps.
See ya,
Jim
http://www.geocities.com/SoHo/Exhibit/8281/beamart.html">http://www.geocities.com/SoHo/Exhibit/8281/beamart.html">http://www.geocities.com/SoHo/Exhibit/8281/beamart.html
ICQ# 55657870