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[DPRG] landwalker parts needed

Subject: [DPRG] landwalker parts needed
From: Quinones, Jose jquinones at ti.com
Date: Mon Nov 30 15:16:27 CST 2009

Not wanting to be the idiot that comes up with the negativity to ruin any given project, but wouldn't it be the best way to leave the wheel chair in obsolescence to create an adapter for the Segway? It would be very simple to create some form of harness which would allow people with any given form of leg incapacitation to remain in the standing position while they get (and stay within) the Segway. Then it is a matter of leaning forward and backward, and the motion takes place.

I know that it would be way cooler to have walking cyber legs, and that maybe this is the end product after some time of development but I just don't understand what is the SOLE fascination with legs, when maybe there are other better methods of achieving the same goal. Of course, our own human egocentrism makes us deem legs the most awesome of all translation contraptions. And maybe they are, but I wonder if it was just a matter of the conditions on this planet being what they were the reason why we came up to be with legs and not, say, wheels (clearly none of the 5 billion of species have anything resembling wheels, so leg-like appendages have been clearly advantageous for survival and deeming my hypothesis most likely mute).

I do not want to be disrespectful here and I am certainly grateful that I have operational legs (for now). I also know that if I were to loose my legs (or its capacity to move me), I would consider cybernetic legs a project of uttermost importance. But at the same time I would not blind myself to only solve the problem with something that resembles legs.

One last note. The Segway can not take you up the stairs or through extremely uneven terrain, which is the only reason in which I think legs have the advantage. But cybernetic legs will have to be extremely complicated to tackle these activities as well, not to mention that cybernetic legs will never be able to move as fast as a wheel based mechanism. So although the Segway has some disadvantages, it would excel on other areas. I think when we become cyborgs a few centuries into the future, we will include attachment ports for both forms of transportation.

I do have to admit that creating an adapter for the Segway would be no fun at all, though... If you need help with the leg motors let me know as I would be interested in toying with these concepts!

Best regards,

Texas Instruments - Applications Engineer
13560 North Central Expressway
Dallas TX, 75243
Office: 1-214-567-7275
Mobile: 1-214-240-3179
From: dprglist-bounces at dprg.org [mailto:dprglist-bounces at dprg.org] On Behalf Of vincent lopresti
Sent: Monday, November 30, 2009 2:22 PM
To: dprglist at dprg.org
Subject: [DPRG] landwalker parts needed

looking for these parts to build a pair of robotic exoskeletal legs for myself. wheelchair is a real pain in the bum :(

need 3' to 6' lengths of hot water pvc pipe 4", 6", 8", 10" & 12", piano hinges, locking latches, nasa memory foam, large press-in bearings, velcro, etc. I'm shopping the hardware store for samples today.

from the computer department, we would need as many spare laptop li-ion batteries as possible. no specific size or model. although, it would be highly convenient if they were all identical models. this will make it easy to mount, recharge and replace when needed. being that these batteries are usually no more than a foot long, they can be placed down the side of the legs instead of wearing a backpack full of batteries.

also, a small wearable pc, palm pilot or iphone that can run windows, wi-fi, webcam, gps, tilt sensors and cell phone features. it will most likely be placed where the belt buckle would be. this will allow us to program, test, monitor and track the landwalker wirelessly. cam is used for object detection and navigation. cell phone for emergency in case landwalker runs away and fails to shutdown or gets stuck somewhere.

hard drive power cables. not 120vac cables. but the ones inside the computer cases. they have a white connector with 4 wires. we need splitters and extensions too for them too. burned out power supplies have lots of connectors we can use. we will use these to connect power to the motors. they are quick release connectors so it will be cheap and easy to work with for now.

we also need a good programmer :)

the motors and actuators are special order items. they are not cheap and must be shipped in. i will start researching the best motors to use for this project.

the piezo film sensors are only about $2 each. 1 inch by half inch. but we will need maybe 200 of them to detect pressure & temperature of both legs. this is needed for triggering the motors via chemoelectric impulses just under the skin, as well as providing absolute safety to the wearer. we do not want to break any bones or hyper extend any joints! we could possibly get a bulk rate discount from mouser electronics or applied electronics.

sponsors are great to have. they could donate these products in exchange for their logo on our robot during press conferences. yes, this will be a major news story once i step into this thing and walk out on the streets.
please let me know if you come across any of these items and/or if you can donate them are at least get them at a significant discount. to join our project or for more info click here<http://apps.facebook.com/sponsor-me/campaign/spaceminers-landwalker-project>

thanks for all your help!,
robotrock =]

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