Alt-BEAM Archive
Message #06918
To: beam@sgiblab.sgi.com
From: SG Sparkyg@seark.net
Date: Wed, 20 Oct 1999 21:04:51 -0400
Subject: [alt-beam] Re: What The...! My Bot Is On Drugs!
...tap tap tap.... is this thing on? tap tap tap
At 12:05 AM 10/20/99 -0400, you wrote:
>Ok, i was havin a little troouble with an h-bridge that kept
>burning out, so i decided to approach the problem in a
>different way.
>I have been using the 74HCT240 for my Master/Slave Bicore
>(Ian's "Compleate Walker Circuit") and read somewhere that
>the AC or HC was preferable over the HCT. so i ordered a
>few 74HC240's from bgMicro. (couldn't find the AC's)
>well, i popped one in there and WOAAAA MOMMMA!
>what the heck is happinin??!!????! MY BOT IS ON DRUGS!!!!
>the steps were MUCH higher, but the whole bot ran like
>it was in a slow motion movie.... had to adjust a pot i had on the
>front servo to get the walking gait straight. Every few
>strides the bot would stop alltogether for about 2 secs.
>after about five mins of playing around and trying to
>tweak it, the thing RAN DOWN my fully charged battery!
>(I was mad too! cause these things take 14 hrs to charge,
>and now i can't play with my bot anymore tonight cause i
>didn't charge up my spare!)
>What happened? i sure don't know! the new HC's i have are numbered
>SN74HC240N
>(hmmmm.. a few extra letters there...)
>weird man weird. ...bummer.
>-Sparky
>
>
Home