On Dec 5 2004, 16:11, Joe R. wrote:
> > The thing about the Veroboard tools is that they have a central
locating
> >pin that fits into the hole,
Ones I've seen don't, but...
> Good for Veroboard. If that's what you want THEN GO BUY IT! But
Ethan
> asked for a substitute and they do not make counterbores with guide
pins
> small enough to fit into a wire hole on a circuit board.
...Yes, they do, I've got some.
--
Pete Peter Turnbull
Network Manager
University of York
>Anyone know where those stacks went?
Probably the same place my stack went... the dumpster after I was
unsuccessful for months in giving them away. I probably tossed 50+ drives
in the range of 40-500 MB.
All mine would have been pulled from old Macs. I would suggest you look
for those to get the drives. You should be able to find 68k macs for free
or darn near it.
Another place to look is the LowEndMac Swap list. You can probably put
out a request for small drives and get more than you would want for
little money (lowendmac.com check the email lists)
-chris
<http://www.mythtech.net>
I grabbed a few pics of some of the multibus boards in our masscomp
earlier:
http://www.moosenet.demon.co.uk/temp/comps/masscomp
CPU, FPP, disk controller, and one of the two memory boards (along with
Witchy's arm :)
Interesting that the CPU board has both 68000 and 68010 chips on it.
Having done some head-scratching, each memory board *I think* is 1MB
plus parity (so 2MB in total in the system)
Disk interface is ST506; turns out there's a pair of Micropolis drives
in it (and I've forgotten the model numbers, but Witchy might remember).
Also floppy and tape interface on the same board.
FPP board main IC is an AM29L516, plus there are 11 AM2901CPC 40-pin
chips...
Still no sign of keyboard and mouse for it though...
cheers
Jules
I received the following list of equipment looking for a new home.
It's located in Queens, New York. If you have an interest in any of
this and can pick it up in person (no shipping), send me an e-mail
off list and I'll put you in contact with the owner.
> * A Packard Bell Force 50-CD computer with 50 MHz Intel Microprocessor,
> 340 MB hard drive, 4 MB RAM, and Windows 3.1 operating system. Works great.
>
>* A Tandy 1000 PC with dual 5 1/4 floppy disk drive, and all the
>peripherals, including keyboard, Tandy RGB Color Monitor CM-4, manuals,
>software, cables, and Radio Shack TRS-80 dot matrix printer (also with
>manual). All work great, despite their age.
>
>* Hayes Smartmodem 2400.
>
>* An Okidata Microline 192 dot matrix printer.
>
>* A Canon BJC-250 printer.
>
>* Software on 5 1/4 floppy disks:
>-- Wordstar (and manual)
>-- DOS 5.0 (and manual)
>-- WordPerfect 5.1
>-- PerfectWriter
>-- PrintShop
>-- Tetris
>-- Wheel of Fortune
>-- Zork
>-- Jeopardy.
Cheers,
Dan
Something that I have started using to help give projects a more
"professional" look is clear adhesive label stock for the case/cover. It
is trivial these days to do a layout on a computer, so just take that
layout and print it on the adhesive label stock. It is a lot less
expensive that silkscreening! If the layout needs protection, just add
another layer of clear adhesive label stock over it. I've had some
trouble finding the label stock locally, but the local Kinko's (a
copying service store in the US) does carry it. I use a sharp X-Acto
knife to cut out the holes after the label has been put into place.
http://www.frontpanelexpress.com/ provides the software to do somewhat
inexpensive front panels including holes, slots, and engraving. The
front panels can be ordered online from their software. I've also used
their software to do the layouts for the label stock printing out using
"wiremode".
> Ethan Dicks wrote:
>
> > Ah... I was under the impression that the cutting edge had a
> > substantially different angle fro a drill (like describing a 180
> > degree arc between the cutting surfaces rather than, say, 150
> > degrees).
>
> My tip:
>
> - using a sharp knife, cut two cuts in the trace
> - use the soldering iron to heat and remove the small fraction of copper
> between the two cuts
>
> Advantage #1: you don't need to buy anything
> Advantage #2: it hardly damages the ressin
> Advantage #3: you can even remove the connection between two pads
> Advantage #4: You can make arbitrarly large areas blank; could be
> usefull for isolation areas
>
> Believe me, this works. Even on epoxy, but just as well on pertinax.
>
> Bert
On Dec 5 2004, 6:55, Ethan Dicks wrote:
> I guess this picture...
>
> http://www.zen22142.zen.co.uk/Prac/vero_circ/8.jpg
>
> ... really shows the divot one gets from the real tool.
Yup, that's typical.
> The tool looks handy for more than a few cuts, though. I wouldn't
> want to try just holding a bit bare-handed - lots of hand cramps and
> slips probably.
Exactly. Given the cost of the genuine tool, I use a pin vice (of
which I have several) to hold the drill bit.
However, if I want it to look neater (I meant to mention this in my
previous message) -- though goodness knows who would care -- I have
been known to use a scalpel or craft knife to cut the copper either
side of a hole and then lift off the small redundant piece. I've also
done that between holes, when I wanted to use two adjacent holes but
isolated from each other.
--
Pete Peter Turnbull
Network Manager
University of York
How small is "small"? I have a dozen or so 100 MB IBM SCSI HDs that were
pulled for an upgrade ... many years ago :).
> I fool around with a lot of systems that want small (by today's
> standards) 50-pin SCSI drives. A few years ago you couldn't walk
> around the streets of Palo Alto without tripping over big stacks of
> 500MB drives. These days, though, the stacks are made out of 9GB SCA
> drives -- far too large for my needs, and often far too large to be
> recognized by the computers I fool around with. But drives smaller
> than that are suddenly "rare" and "expensive", $30 or $40 for any
> SCSI drive under 9GB at a lot of resellers I've visited lately.
>
> Anyone know where those stacks went? Are small drives just impossible
> to come by for less than $30 now?
>
> -Seth
Can anyone give me the pinout and details of the power
supply used on the Dragon32 (have a machine with no
supply) - It has a 9-pin 'D' connector on the back of
the machine for the power input!
Searched and found some hardware info, but not the power
information...
Regards,
Dave
--
dave04a (at) Dave Dunfield
dunfield (dot) Firmware development services & tools: www.dunfield.com
com Vintage computing equipment collector.
http://www.parse.com/~ddunfield/museum/index.html
Why not just make a paddle card with one of the USB
parallel bit wigglers, and have the thing totally virtual
on a laptop? You could even line a bunch of them up on
the screen if you want to probe more than one device at
a time, or rearrage the bits so they make more sense
logically?
