Alt-BEAM Archive
Message #04894
To: beam@sgiblab.sgi.com
From: landry b matt stratguitar911@juno.com
Date: Sun, 27 Jun 1999 00:25:45 -0500
Subject: [alt-beam] Re: A new life is born
hey
well just to say i'm glad that ian's cuircut works, i was going to use
it for my 1st walker as soon as the parts that i ordered come in....
good work
matthew
On Sat, 26 Jun 1999 22:56:14 -0400 SG writes:
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>Hello All! Just like to introduce you to "Lotus I"
>My first walker.
>Based on Ian's "Almost compleate walker" circut found at
>http://www.beam-online.com/Robots/Circuits/circuits.html
>ALTHOUGH:
>1.used 20 uf Cap instead of 30, this is for reverser, bigger cap,
>longer
>reverse time, .. (20 even seems to be even too long for me)
>2.couldn't get 1.6M resistors, so used 1.5M
>3.guys at many diff shops told me there was no such thing as a 2.5M
>resistor, had choice of 2.0 or 2.7, used 2.7M
>4.used an IC socket, (i reccomend this for newbies when you get +and-
>mixed
>up, you can replaced the ic you just fried.
>
>I can say once and for all that YES this circut does werk and not too
>shabby either in my opinion! The reverser works like a dream too
>although
>i havn't got my Tactile sensor attached to the frame yet. touched the
>wire
>to grnd, and it backed perfectly.
>keep in mind this is my FIRST bot, havn't built a solar roller or
>photopooper yet. Heck i havn't even touched a soldering iron till i
>started
>this project!
>Thanks to IAN! what a help your page has been! (watch the H-Bridge be
>sure
>to read the NOTE on step 3. I think i'm the one that discovered this)
> Also thanks to you folks on this mail list for your input too!
>FRAME:
> Aluminum angle bar (very light) 7" lng. notched for angle at front
>held together with small machine screws. used rubber O-RINGS for
>washers
>where IC PCB is attached to frame.
>Has LED's showing when legs fire (very nice touch i thank whoever
>reccomended this)
>MOTORS:
> two CS-61 Hobbico Standard Servos $10 each (boy i think they're
>ugly, i
>much prefer the look of bg micros motors i've seen in pics)
>LEGS:
>Originally used 1/8" welding rod, but needed to practice on the leg
>semmetry a LOT, now using COAT HANGERS. Too bad, welding rod was
>silver
>like the frame. leg ends coated with plasti-dip. used longer (1-1/4")
>machine screws for "stops"
>POWER:
>1.4V rechargable Batt. Manager at radio shack gave me ALL he had (5)
>for
>$10, he wanted em off the shelf. (they getting rid of them? try making
>offer to manager at R.S. in your area) attached to frame by electrical
>ties
>(not bad!)
>COMMENTS:
>still need to werk on legs, havn't got the shape quite right, front
>lift
>is only about 1/8 of an inch,... but other than that i feel like a
>proud
>parent.
>still need to add tactile sensor, i'll probably add two on each side
>of
>front to give that "bug" look. (though you only prob. need only one)
>lemme know yur comments i'm interested in wat you think.
>-Sparky
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