[Robotgroup] CD/hard drive hacks?

[Gray Mack]

Also, you can build a stepper driver for most unipolar motors out of a 555 timer, 4017 decade counter, and some 2n2222 transistors :)
-Gray


--- On Fri, 7/25/08, brooksdesign <brooksdesign at peoplepc.com> wrote:

> From: brooksdesign <brooksdesign at peoplepc.com>
> Subject: Re: [Robotgroup] CD/hard drive hacks?
> To: "The Robot Group Mailing List" <robotgroup at puremagic.com>
> Date: Friday, July 25, 2008, 4:50 PM
> Ooooo, I like this site for alot of differant projects. 
>   My goal is to do away with ANY controller..... or need
> for anything requiring coding or connection to a computer.
> Just an opamp or what ever would be required to get a
> signal out of the read heads. Andre's suggestion was
> way more complex than I want to get into. I'm not going
> for any digital anything rather to use this as an analog
> audio output device. I geuss I could just cut the wires
> from the head and hook it up to my scope...ooops, just
> remembered...scope dead now so maybe high gain preamp and
> see what I can get out of it. So are these things like
> variable resitance devices where you have to supply a
> voltage that the modulate or do they create their own
> output signal like a tape head? Also, is a hard drive head
> similar to a tape head in that way...a tiny coil of wire
> wrapped around an iron C shaped core?
> -brooks 
> 
> -----Original Message-----
> >From: Vern Graner <vern at txis.com>
> >Sent: Jul 25, 2008 5:23 PM
> >To: The Robot Group Mailing List
> <robotgroup at puremagic.com>
> >Subject: Re: [Robotgroup] CD/hard drive hacks?
> >
> >brooksdesign wrote:
> > > Anybody out there ever hacked into the read/write
> heads of
> > > a hard drive
> >
> >Does this help?
> >
> >http://hackedgadgets.com/2007/10/02/hard-disk-drive-voice-coil-laser-shutter-actuator/
> >
> >in case the above is broken:
> >
> >http://tinyurl.com/5m8pnn
> >
> >Vern
> >
> >-- 
> >Vern Graner CNE/CNA/SSE    | "If the network is
> down, then you're
> >Senior Systems Engineer    | obviously incompetent so
> why are we
> >Texas Information Services | paying you? Of course, if
> the network
> >http://www.txis.com        | is up, then we obviously
> don't need
> >Austin Office 512 328-8947 | you, so why are we paying
> you?" ©VLG
> >_______________________________________________
> >Robotgroup mailing list
> >Robotgroup at puremagic.com
> >http://lists.puremagic.com/cgi-bin/mailman/listinfo/robotgroup
> 
> 
> ________________________________________
> PeoplePC Online
> A better way to Internet
> http://www.peoplepc.com
> _______________________________________________
> Robotgroup mailing list
> Robotgroup at puremagic.com
> http://lists.puremagic.com/cgi-bin/mailman/listinfo/robotgroup