Newsgroups: comp.robotics
From: Leon@lfheller.demon.co.uk (Leon Heller)
Path: cantaloupe.srv.cs.cmu.edu!das-news2.harvard.edu!fas-news.harvard.edu!newspump.wustl.edu!news.starnet.net!wupost!howland.reston.ans.net!news.sprintlink.net!pipex!peernews.demon.co.uk!lfheller.demon.co.uk!Leon
Subject: Re: Servo schems.
References: <3g5ut3$r0r@newsbf02.news.aol.com> <3g6ppa$1o6p@tequesta.gate.net> <3gujak$tf@mailhost.auslig.gov.au>
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Date: Sat, 4 Feb 1995 20:07:34 +0000
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In article <3gujak$tf@mailhost.auslig.gov.au>
           cjackson@auslig.gov.au "Craig Jackson" writes:

> BJHL (bjhl@aol.com) wrote:
> > I am in need of some info. on interfacing servos to computers and also
> > analog electronics. If anyone could help I would greatly appreciate it.
> > Thanks in advance.
> 
> FYI, a standard hobby servo takes +5-6V on the red wire, GND on the
> black wire, and a signal on the third (white/yellow/blue) wire.
> 
> The signal is a positive going TTL or CMOS pulse, repeated every 20ms
> or so.  The width of the pulse conveys the requested position.
> 
> So,
>         1ms pulse = fully one way.
>         2ms pulse = fully other way,
>         1.5ms pulse = neutral.

A good way to experiment with servos is to drive them from a printer
port. The software is quite trivial.

Leon
-- 
Leon Heller                       | "Do not adjust your mind, there is
G1HSM                             |  a fault in reality": on a wall
Email: leon@lfheller.demon.co.uk  |  many years ago in Oxford.
Phone: +44 (01734) 266679         |
