home *** CD-ROM | disk | FTP | other *** search
- Newsgroups: comp.robotics
- Path: sparky!uunet!news.univie.ac.at!scsing.switch.ch!univ-lyon1.fr!ghost.dsi.unimi.it!rpi!uwm.edu!caen!sol.ctr.columbia.edu!destroyer!cs.ubc.ca!uw-beaver!micro-heart-of-gold.mit.edu!news.media.mit.edu!fredm
- From: fredm@media.mit.edu (Fred G Martin)
- Subject: Re: Crazy about legs
- Message-ID: <1993Jan27.140858.29306@news.media.mit.edu>
- Sender: news@news.media.mit.edu (USENET News System)
- Organization: MIT Media Laboratory
- References: <1993Jan27.043305.7387@sbcs.sunysb.edu>
- Date: Wed, 27 Jan 1993 14:08:58 GMT
- Lines: 25
-
- In article <1993Jan27.043305.7387@sbcs.sunysb.edu> shane@cs.sunysb.edu
- (Shane Bouslough) writes:
-
- >I've been thinking a lot about legs recently (don't we all? :-).
- >If you're going to do a nice leg, say Brooksian, it seems like
- >you'd need about one miniboard per. If you use 6 legs on your
- >beastie, that's quite a few miniboards. Is that a good way to go?
- >Or is something a bit more powerful a better idea?
-
- In fact, this is just about what is done with Rod Brooks' robots:
- there is a dedicated CPU per leg. But, they use very small DIP CPU's
- (maybe a 24-pin model), and surface mount motor controllers, so the
- leg processor board is pretty small. Also, it's kind of shaped like a
- leg, long and skinny.
-
- >Miniboards are such a nice "out of the box" solution, but a chain
- >of them like that sure would suck down the juice.
-
- The motor chips on the Mini Board are the "worst offenders"; they draw
- about 30 mA each, even when not supplying power to a motor. The CPU
- itself only draws 20 mA. If someone could find a more efficient motor
- driver and paste it on to the Mini Board it wouldn't be too bad from a
- power point of view.
-
- - Fred
-