Alt-BEAM Archive
Message #09161
To: beam@sgiblab.sgi.com beam@sgiblab.sgi.com
From: Richard Piotter richfile@rconnect.com
Date: Friday, 14 January 2000 3:02
Subject: Re: microcore experimentation kit
>What's a projected total cost? At $5, I'd be limited to small
>quantities, say 10 to 20 max, but if they were around $2.50, I wouldn't
>have a problem saving up for 30 to 40 or so. If they were more
>expensive, it'd be more dificult to purchase large quantities.
>Unfortunately, I'll have to wait for them, whatever the cost, till I
>build up some spare cash. Anyhow, I think the demand would be
>impressive. Wouldn't supprise me if Tilden started making them for
>himself if they fared successfuly on the list! It's simply the next
>logical step in expirimentation. It's too dificult to form complex
>pathways of neurons when you are limited by the 6 NV core's physical
>orientation. I could also imagine these being made into visual NV/Nu
>demos. You can arrange the neurons according to a pattern that shows the
>pathways for demonstration purposes. You could form 3D circuits much
>more easily. Board design would then be nothing more than having the
>power supplies and the pathways for signals. Well, one more thing. you
>realy need to include plugs for both capacitor and resitor. When
>switched around the Nv becomes an Nu. Realy a requirement for
expirimentation.
>
>I'm looking forward to such a thing. It would greatly reduce the
>dificulty in BEAM expirimentation.
>
>I'd like to see a variable resistor on the board, but if there is one,
>and it's soldered, you'll need to offer two versions of the board, Nv
>and Nu. Also, not everyone uses the more wide spread negative supply
>connection for the resistor. I came up with a good chip pin out.
> __________
> | ,--. |
> {+) o|-. o `--|o Out
> | `-/ \--. |
> | /___\ | |
>Bias o|-. | ,-+-|o Polarity
> | `o-+ o | |
> | | | |
> In o|-o `o `-|o (-)
> |__________|
>
>If you need to use it with negative polarity like most people do, then
>you just tie polarity and (-). If you want positive, you tie it accross
>to the (+). Bias can be driven fron the output of other neurons or from
>other sources. Input is on the same side, as both can recieve inputs.
>Out is at the top corner. Chaining these inline wouldn't be a problem at
all!
>
> (+)-+-----------+-----------+----------+
> | | | |
> | ___ | ___ | ___ | ___
> `-| |---o `-| |---o `-| |---o `-| |---o
> | | | | | | | | | | | |
> -| |-. | -| |-. | -| |-. | -| |-. |
> | | | | | | | | | | | | | | | |
> .-------|___|-+ `---|___|-+ `---|___|-+ `---|___|-+ |
> | | | | | |
> | (-)---------+-----------+-----------+-----------+ |
> | |
> `---------------------------------------------------'
>
>simple microcore out of these things. Easy to wire up, and easy to expand.
>
>
>
>> David Perry wrote:
>>
>> Now that this has been raised a few times i'd like to go into it
>> further.
>>
>> Isn't it a pain wiring up microcores? Using a 74hc14 chip is very
>> cumbersome.
>>
>> What if (as someone suggested) i create a small circuit board complete
>> with a single schmitt inverter and either a plug to put in your own
>> resistor or an adjustable pot built in. Plus a plug to add your own
>> hysteris. A SMD LED is on board. It would connect to a breadboard (or
>> protoboard) with some PCB pins, a little like the BASIC STAMP. With
>> this you could easily grab a few, plug them in, connect them in your
>> own pattern an you have a microcore. Would people be intrested in such
>> a thing? I could start a production of them. Keep in mind though they
>> may be rather expensive compared to buying a 17HC14 and individual
>> parts. This is just because the parts themselves are rather expensive.
>> (A single schmit inverter is 68 cents).
>>
>> David
>
>--
>
>
>Richard Piotter The Richfiles Robotics & TI web page:
>richfile@rconnect.com http://richfiles.calc.org
>
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