[Robotgroup] CD/hard drive hacks?

[brooksdesign]

This is more my style and the extent of my experience with electronics. I don't even need to control the head posistoner arm, I'm doing that with a rod linkage that I can manipulate with my hand (or with my teeth like all the REAL rock stars). I know I've seen the stepper driver chips in my 15 year old ECG catologue but I think I have all of the components listed below in my IC cabinet somewhere gathering dust. Along with a bunch of 741 op-amps I grew up using. That should give you some idea how long its been since I did that sort of thing. Any chance you would have any sample schematics for the cicuit listed below? I geuss I would need the specs on the spin motor but anything you have would get me going in the right direction. I know I have or had a Forest Mimms book that had some in there but I have not seen it in a while and may not have made the move last year.
-brooks

-----Original Message-----
>From: Gray Mack <gray_mack at yahoo.com>
>Sent: Jul 25, 2008 6:13 PM
>To: The Robot Group Mailing List <robotgroup at puremagic.com>
>Subject: Re: [Robotgroup] CD/hard drive hacks?
>
>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
>
>
>      
>_______________________________________________
>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