18 May
2005
18 May
'05
7:35 a.m.
I'm sitting on a gold-mine! I never thought I'd see this. I actually
gave away over a dozen of these a couple of years ago just to thin out the
herd!
<http://cgi.ebay.com/ws/eBayISAPI.dll?ViewItem&item=5195903359&rd=1&sspagena
me=STRK%3AMEWA%3AIT&rd=1>
Joe
18 May
18 May
11:36 a.m.
On 5/18/05, Joe R. <rigdonj at cfl.rr.com> wrote:
I'm sitting on a gold-mine! I never thought
I'd see this. I actually
gave away over a dozen of these a couple of years ago just to thin out the
herd!
I think I have the touchscreen frame from one of those, 4 circuit
boards linked together in a box, with a lots of LEDs and
phototransistors. Always been curious what it came out of.
-ethan
7:55 p.m.
I think I have the touchscreen frame from one of
those, 4 circuit
boards linked together in a box, with a lots of LEDs and
phototransistors. Always been curious what it came out of.
Quite possibly, that's how the touchscreen worked on the 150.
FWIW, I have the HP150 Technical manual, with the HP150-II update. It
includes a schematic for the original touchscreen, but not, for some odd
reason, the one used in the -II machine with the HP-HIL interface.
-tony
9:02 p.m.
At 12:55 AM 5/19/05 +0100, you wrote:
It was also a option in one of the terminals but I forget which one. I
have a loose board of LED/Phototransistors that I found was used to
retrofit Touchscreen capability into one of the terminals.
Joe
I think I have
the touchscreen frame from one of those, 4 circuit
boards linked together in a box, with a lots of LEDs and
phototransistors. Always been curious what it came out of.
Quite possibly, that's how the touchscreen worked on the 150.
19 May
19 May
6:58 p.m.
At 12:55 AM 5/19/05 +0100, you wrote:
It was also a option in one of the terminals but I forget which one. I
have a loose board of LED/Phototransistors that I found was used to
retrofit Touchscreen capability into one of the terminals.
I once saw an HP monitor with a pair of HP-HIL connectors on the back...
Intrigued, I waited for the 'owner' (actually user) to leave, and then
cautiously pulled the case. It turned out it could take the same
touchscreen option as the HP150-II, and that these were the connectors
for that.
No, I can't remember model numbers, etc.
-tony
I think I
have the touchscreen frame from one of those, 4 circuit
boards linked together in a box, with a lots of LEDs and
phototransistors. Always been curious what it came out of.
Quite possibly, that's how the touchscreen worked on the 150.
8:04 p.m.
On Thu, 2005-05-19 at 23:58 +0100, Tony Duell wrote:
Hmm, we've got two or three HP terminals with the touchscreen option;
Hans Pufal was over last weekend and pointed them out (we've got a big
stack of HP terminals which I've had time to sort into piles by model
number but never do anything else with).
I'll have a look if I get a chance and see what the model number is for
these (and what connectors they have).
cheers
Jules
At 12:55 AM 5/19/05 +0100, you wrote:
It was also a option in one of the terminals but I forget which one. I
have a loose board of LED/Phototransistors that I found was used to
retrofit Touchscreen capability into one of the terminals.
I once saw an HP monitor with a pair of HP-HIL connectors on the back...
Intrigued, I waited for the 'owner' (actually user) to leave, and then
cautiously pulled the case. It turned out it could take the same
touchscreen option as the HP150-II, and that these were the connectors
for that. I think I
have the touchscreen frame from one of those, 4 circuit
boards linked together in a box, with a lots of LEDs and
phototransistors. Always been curious what it came out of.
Quite possibly, that's how the touchscreen worked on the 150.
9:53 a.m.
>>>> "Tony" == Tony Duell <ard
at p850ug1.demon.co.uk> writes:
> I think I have the touchscreen frame from one of
those, 4 circuit
> boards linked together in a box, with a lots of LEDs and
> phototransistors. Always been curious what it came out of.
Tony> Quite possibly, that's how the touchscreen worked on the 150.
Don't know about the 150, but that approach (rows and columns of light
beams) is how the touch panels on PLATO terminals -- starting early in
the 1970s -- worked. Of course it's easier when the screen is flat,
as it always has been for plasma displays.
paul
11:28 a.m.
HP150 touchscreens work without touching. There are indeed rows on the top,
bottom, left and right just in front the actual screen, if you break one of
the "beams" it will detect that and do whatever its meant to do.
At 15:53 19-5-2005, you wrote:
-------------------------------------------------------
http://www.oldcomputercollection.com
>>>> "Tony" == Tony Duell <ard at p850ug1.demon.co.uk> writes:
> I think I have the touchscreen frame from one
of those, 4 circuit
> boards linked together in a box, with a lots of LEDs and
> phototransistors. Always been curious what it came out of.
Tony> Quite possibly, that's how the touchscreen worked on the 150.
Don't know about the 150, but that approach (rows and columns of light
beams) is how the touch panels on PLATO terminals -- starting early in
the 1970s -- worked. Of course it's easier when the screen is flat,
as it always has been for plasma displays.
paul
7004
days inactive
7006
days old
7 comments
6 participants
participants (6)
-
ard＠p850ug1.demon.co.uk -
birs23＠zeelandnet.nl -
ethan.dicks＠gmail.com -
julesrichardsonuk＠yahoo.co.uk -
pkoning＠equallogic.com -
rigdonj＠cfl.rr.com