From: Gideon Zweijtzer (gideonz_at_dds.nl)
Date: 2005-08-13 11:46:16
Hi Antitrack,
Using a reed-contact seems to me like a very unreliable and inaccurate
way of doing such a thing. I don't think a reed-contact is ever meant to
be used for the generation of timing pulses.
Why don't you use a hall-sensor instead? They come in very small casings
(a lot smaller than reed-contacts), and because they do not have any
moving parts, they're faster and more accurate, too. You might need a
resistor or two to apply the right bias, but it will pay off.
Gideon
> -----Original Message-----
> From: owner-cbm-hackers@ling.gu.se
> [mailto:owner-cbm-hackers@ling.gu.se] On Behalf Of
> Antitrack@networld.at
> Sent: Friday, August 12, 2005 22:38
> To: cbm-hackers@ling.gu.se
> Subject: Please help with Catweasel Reed-Contact
>
>
>
> Howdy Hackers :-)
>
> I need a bit of help with reading the second diskside of
> 1541-disks in Catweasel
> drives.
> You probably remember that you have to mount a magnet and a
> reed-switch to the
> PC drive in order to replace the light resistor/index hole stuff.
> However, I've got some bad experience with several reed
> contacts - it seems they
> sometimes miss the magnet and thus don't do the pulses
> properly. If someone got it "properly" please grab your
> oscilloscope and tell me how the
> normal light diode/resistor pulses ought to be like in timing
> and duration (i.e.
> length of pulse). And please recommend me a reed-switch that
> is reliable - I
> have tried several, none of them being reliable enough to
> generate the pulses.
>
> If you know any other method of replacing the indexhole/LED
> stuff on the PC
> drive, please let me know.
>
> Another question - I guess some of you have the IDE64, which
> now can use CF
> Flash cards instead of IDE drives. Great stuff. I think it
> would be cool to make
> an 8 sec GCR copy that copies a whole 1541 disk image to
> IDE64 - is there such a
> tool already? If not I'll do it (but first I need to know
> where to buy a IDE64
> and how much it costs).
>
> Yours
> ATT
>
>
>
> --------------------------------------
> Ein Service von http://www.networld.at
>
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