Newsgroups: comp.robotics
Path: cantaloupe.srv.cs.cmu.edu!das-news2.harvard.edu!news2.near.net!MathWorks.Com!udel!gatech!swrinde!news.dell.com!tadpole.com!uunet!newsflash.concordia.ca!tsunami.cc.mcgill.ca!mcrcim.mcgill.edu!nyongwa!matrix
From: matrix@nyongwa.montreal.qc.ca (Albert Yale)
Subject: Re: PC controled robotic arm project...
Message-ID: <CxLBC7.CtB@nyongwa.montreal.qc.ca>
X-Advertisement: FREE EMAIL/USENET/UUCP: (514) 524-0829 | 524-2340
Organization: Radio Free Nyongwa, Montreal (Qc), Canada
Date: Thu, 13 Oct 1994 02:38:31 GMT
References: <CxLAn0.CJC@nyongwa.montreal.qc.ca>
X-Newsreader: TIN [version 1.2 PL2]
Lines: 47

Albert Yale (matrix@nyongwa.montreal.qc.ca) wrote:
:  
: Okay, i've been asking questions and questions, now, leme present you my
: whole project, and i'd be very gratefull if anyone sends me suggestions.
: tnx a lot!
:  
: I wana control step motors through a pc's parallel port. he's the idea...
:  
: Motor spec: 'Big Inch Motor' by HSI (?)
:             8-10vdc
:             3.6w
:             2deg/step
:  
: Pallel port spec: 5.2vdc
:                   13mA
:  
: My idea was:
:  
:         7407 juice (+5v ext power sup1)   stepper juice (+9v ext power sup2)
:                               |                    |
:                               v                    v
:   +5v comp's paral port --> 7407 (inverter) -> 5v relays -> 8-10v stepper
:                               |                                 |
:                               v                                 v
:                        paral port's grn                ext power sup's grn
:  
:  
: What i've heard so far:
:  
: - 7407 max input power 5v (right?)
: - i _could_ use transistors (but i don't know the first thing about
:   transistors! :( you have to understand i'm a comp.sc student (on a
:   budget), electronics is only a passtime for me -- i only had one semester
:   of electricity/magnetism/electronics back in college.)
: - i should use a diode and a resistor somewere in this? (maybe)
:  
: tnx for all the possible help i can get.
:  
: 'Matrix'
:  

Oh, i forgot 2 important points, the stepper is 2 phase and my real problem
is only switching the 5v relays, the rest seems okay. (i can send my
circuit maker design on request). tnx again to all that will reply
(hopefully) ;)

'Matrix'
