19 Mar
2002
19 Mar
'02
6:34 p.m.
From: Joe <rigdonj(a)cfl.rr.com>
That's true but I think they just enjoy seeing
who can hang the most
stuff off of a ZX81. Sort of like the guys that see who can put the
biggest
engine inside a Chevy Vega!
After considering this, I think you've hit the nail on the head, Joe,
except that the only thing we don't change is the engine! The Z80, ROM and
ULA *have* to be present!
Our goals seem to be:
1 -- Build an interface for every device under the sun, including the
toilet seat.
2 -- Write software to perform every task ever performed by any computer
anywhere. The software should be 100% Z80 machine code and should push the
ZX81 as hard as possible.
3 -- Do all of the above for US $25 or less.
I hope everyone has as much fun with their old computers as I have with
mine!
Glen
0/0
19 Mar
19 Mar
7:05 p.m.
Glen Goodwin wrote:
1 -- Build an interface for every device under the
sun, including the
toilet seat.
That is easy -- a micro switch ... now how do you tell if the ROLL is
almost empty ?
--
Ben Franchuk - Dawn * 12/24 bit cpu *
www.jetnet.ab.ca/users/bfranchuk/index.html
7:39 p.m.
On Tue, 19 Mar 2002, Ben Franchuk wrote:
Glen Goodwin wrote:
Press-fit roll spindle with shaft encoder attached to one serial port on
a PDP-11 running a backround job counting total turns, comparing against
approximate turns-to-roll-exhaustion, and triggering (thru another serial
port) an appropriate alarm, or perhaps printing out a TP-LO Warning.
Now how do you tell if the previous occupant actually washed their
hands?
Cheerz
John
1 -- Build an interface for every device under
the sun, including the
toilet seat.
That is easy -- a micro switch ... now how do you tell if the ROLL is
almost empty ? 
20 Mar
20 Mar
3:50 a.m.
New subject: Toilett processing (Was: ZX-TEAM meeting and Webcam)
On Tue, 19 Mar 2002, Ben Franchuk wrote:
> Glen Goodwin wrote:
> > 1 -- Build an interface for every device under the sun, including the
> > toilet seat.
> That is easy -- a micro switch ... now how do you tell if the ROLL is
> almost empty ?
Press-fit roll spindle with shaft encoder attached
to one serial port on
a PDP-11 running a backround job counting total turns, comparing against
approximate turns-to-roll-exhaustion, and triggering (thru another serial
port) an appropriate alarm, or perhaps printing out a TP-LO Warning.
Isn't using a PDP-11 as perhipheral processor for a ZX81
a bit out of scope ?
Now how do you tell if the previous occupant
actually washed their
hands?
what about a water flow sensor which tells the amout of
water used at the sink, and a soap dispenser switch to
see if soap has been at least requested ? So if one doesn't
use enough water, or over a way to short time, or didn't
use soap at all, or triggered the soapswitch without using
water afterwards, we just keep the door locked. Maybe with
an additional voice output according to the situation (*).
Gruss
H.
(*) Ach ja: if the TU (toilet user) had tried to open the
door, a message like 'The sanitary sywstem of this UDP
facility would apreciate if you also cleanthe door handle'
should be added.
--
VCF Europa 3.0 am 27./28. April 2002 in Muenchen
http://www.vcfe.org/
6:34 a.m.
New subject: Toilett processing (Was: ZX-TEAM meeting and Webcam)
--- Hans Franke <Hans.Franke(a)mch20.sbs.de> wrote:
Or an optical sensor mounted parallel the axis of the roll that would
trigger when the diameter was too low. How about a color-based sensor
that could detect the difference between the cardboard core and the
paper? What about a shaft encoder that measures angular velocity...
for low velocities, there must be lots of paper (when the roll is full,
3 squares per second produces, say, 1/60 RPM; but when the roll is nearly
empty, the same linear pull rate produces 1/20 RPM - kinda the opposite
of linear bit-density calculations on variable zone recording floppies
and hard disks). There's probably a way to embed an inertial sensor in
the holder to measure the force it takes to start the roll moving... the
possibilities are endless!
On Tue, 19 Mar
2002, Ben Franchuk wrote:
> Glen Goodwin wrote:
> > 1 -- Build an interface for every device under the sun, including
> > the toilet seat.
> That is easy -- a micro switch ... now how do you tell if the ROLL is
> almost empty ?
> Press-fit roll spindle with shaft encoder attached to... a PDP-11...
> counting total turns, comparing against approximate turns-to-roll-
> exhaustion, and...printing out a TP-LO Warning. Isn't using a PDP-11 as perhipheral processor for
a ZX81
a bit out of scope ?
Nah! You shoulda been at Lucent when a 3rd-shift factory worker rebooted
the $500,000 Fujitsu SMT part placer so he could surf the web on the
attached 486 that ran a windows app to display the parts and their
orientation. A full production line halted so a blue-collar guy could
go check out EPSN. No kidding. But it was a union shop - all he got
was a written reprimand.
The point is, who says the peripherals have to be less powerful than the
core? Our original COMBOARD was an 8MHz 68000 sitting on the Unibus
of a PDP-11 - the serial card had more horsepower than the machine it
was mounted in (one way it got used: we had our own dataproducts port
so we could spool jobs from the IBM right to a printer, relieving the
burden on the, typically, RSTS print spooler).
-ethan
__________________________________________________
Do You Yahoo!?
Yahoo! Sports - live college hoops coverage
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6:54 a.m.
New subject: Toilett processing (Was: ZX-TEAM meeting and Webcam)
> That is easy -- a micro switch ... now how do you
tell if the ROLL is
> almost empty ?
> Press-fit roll spindle with shaft encoder attached to... a PDP-11... > Isn't using a PDP-11 as perhipheral processor
for a ZX81
> a bit out of scope ?
Why? Isn't a PDP-11 adequate?
30 years ago, at GSFC, we used a 360 for I/O for a 7094.
The point is, who says the peripherals have to be less
powerful than the
core?
When the original LaserWriter came out, it was substantially more powerful
than the current Macs.
--
Grumpy Ol' Fred cisin(a)xenosoft.com
3:24 p.m.
New subject: Toilett processing (Was: ZX-TEAM meeting and Webcam)
On Wed, 20 Mar 2002, Fred Cisin (XenoSoft) wrote:
Or measure diameter of roll with optical sensors or
microswitch from the
backside.
Considering the subject, umm, _matter_, "backside may have been apoor
choice of words.
Or build a dispenser, and have it maintain an
inventory count
Heh. And an attached loudspeaker to notify the building when the user
grabs half the roll?
Doc
3:41 p.m.
New subject: Toilett processing (Was: ZX-TEAM meeting and Webcam)
Or build a
dispenser, and have it maintain an inventory count
Heh. And an attached
loudspeaker to notify the building when the user
grabs half the roll? 
21 Mar
21 Mar
2:26 a.m.
New subject: Toilett processing (Was: ZX-TEAM meeting and Webcam)
At 06:41 PM 3/20/02 -0800, you wrote:
Actually, the paper handling system in some of the old
Panasonic printers
could be adapted. It would reel back in what the cat had taken, and then
advance just enough to provide a grip for pulling.
I like this. And, how about "classiccmp designer toilet paper" with
ms , wicktel and other loathed entities' corporate imagery on
it? :-)
carlos.
--------------------------------------------------------------
Carlos E. Murillo-Sanchez carlos_murillo(a)nospammers.ieee.org
7:37 a.m.
New subject: Toilett processing (Was: ZX-TEAM meeting and Webcam)
On Thu, 21 Mar 2002, Carlos Murillo wrote:
I like this. And, how about "classiccmp designer
toilet paper" with
ms , wicktel and other loathed entities' corporate imagery on
it? :-)
Why not save the cost of commercial toilet paper and load it with Compaq
and HP stock certificates?
7:48 a.m.
New subject: Toilett processing (Was: ZX-TEAM meeting and Webcam)
Rumor has it that Carlos Murillo may have mentioned these words:
At 06:41 PM 3/20/02 -0800, you wrote:
Nah... too obvious. Just make it look like greenbar - that would be cool!
I remember seeing greenbar, pinfed *bedsheets* a long time ago... I wonder
if any company's still making them. ;-)
Laterz,
Roger "Merch" Merchberger
--
Roger "Merch" Merchberger --- sysadmin, Iceberg Computers
Recycling is good, right??? Ok, so I'll recycle an old .sig.
If at first you don't succeed, nuclear warhead
disarmament should *not* be your first career choice.
Actually, the paper handling system in some of the
old Panasonic printers
could be adapted. It would reel back in what the cat had taken, and then
advance just enough to provide a grip for pulling.
I like this. And, how about "classiccmp designer toilet paper" with
ms , wicktel and other loathed entities' corporate imagery on
it? :-)
1:32 a.m.
New subject: Toilett processing (Was: ZX-TEAM meeting and Webcam)
> > Isn't using a PDP-11 as perhipheral
processor for a ZX81
> > a bit out of scope ?
Why? Isn't a PDP-11 adequate?
30 years ago, at GSFC, we used a 360 for I/O for a
7094.
Yeah, wasn't the goal to pack as much load on the Z80 ?
Furthermore, we should be serious and consider comercial
posibillities - and if we ant to sell our UDP management
system, it has to go into one of these little add on
packages to be plugged inbetween lots of other such boxes
into a ZX81. So a full figured PDP is out of scope (*).
Gruss
H.
(*) Well, on a second thought, we could fit a ZX81 to QBus
Interface into the little box, and have a cable running over
to our extended interface rack (aka PDP 11).
--
VCF Europa 3.0 am 27./28. April 2002 in Muenchen
http://www.vcfe.org/
20 Mar
20 Mar
1:09 p.m.
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4:37 p.m.
On Thu, 21 Mar 2002, Tony Duell wrote:
Wouldn't the guts from a current cheap mouse work nicely for that?
measure increase in the turbidity, BOD5 (Biochemical Oxygen Demand),
D.O.(Dissolved Oxygen), and suspended and dissolved solids in the waste
water relative to the water supply. Fecal coliforms would be overkill,
and hard to automate.
A company that I once worked for installed water quality monitoring
equipment at Coors'. They were having major problems with calibration
until they realized that they had just found a BIG leak in one of the
tanks - saved the brewery many hundreds of gallons.
Press-fit
roll spindle with shaft encoder attached to one serial port on
a PDP-11 running a backround job counting total turns, comparing against
Why use a
serial port for this? Why not one of the pulse-counter cards? I
think either the MNCKW (MInc clock module) or the KW11-K can be used for
this. Now how do
you tell if the previous occupant actually washed their
hands?
Detect water flow (trivial), reduction in weight of the soap (so you know
some has been used), and (temporary) incresse in weight of the towel (so
you know it's absorbed some water). OK, it doesn't actually prove that
the soap/water were used on the person's _hands_, but...
21 Mar
21 Mar
8:21 a.m.
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1:36 a.m.
New subject: Toilet Processing (Was: ZX-TEAM meeting and Webcam)
> Now how do you tell if the previous occupant
actually washed their
> hands?
Detect water flow (trivial), reduction in weight of
the soap (so you know
some has been used), and (temporary) incresse in weight of the towel (so
you know it's absorbed some water). OK, it doesn't actually prove that
the soap/water were used on the person's _hands_, but...
Tony you're a genius. The TTP (Towel Tester Procedure) is a great
enhancement of our UDP/MS. If the towel is now mounted far enough
away from the sink to avoude that the TU may just wet it directly,
the system will be greatly enhanced.
One more thing, did we already plan for a switch to check if the
toilet has been flushed at all ?
Gruss
H.
--
VCF Europa 3.0 am 27./28. April 2002 in Muenchen
http://www.vcfe.org/
19 Mar
19 Mar
7:48 p.m.
On Tue, 19 Mar 2002, Ben Franchuk wrote:
Glen Goodwin wrote:
Ummm, an infrared laser & sensor array at the crucial point?
Doc
1 -- Build an interface for every device under
the sun, including the
toilet seat.
That is easy -- a micro switch ... now how do you tell if the ROLL is
almost empty ?
20 Mar
20 Mar
1:06 p.m.
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8160
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8162
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18 comments
10 participants
participants (10)
-
acme_ent＠bellsouth.net -
ard＠p850ug1.demon.co.uk -
bfranchuk＠jetnet.ab.ca -
carlos_murillo＠epm.net.co -
cisin＠xenosoft.com -
doc＠mdrconsult.com -
erd_6502＠yahoo.com -
Hans.Franke＠mch20.sbs.de -
jpl15＠panix.com -
zmerch＠30below.com