At 10:49 AM 5/10/99 -0700, you wrote:
>
>
>--- ss_at_allegro.com wrote:
>>
>> Re:
>>
>> > I've been playing with a HP 150 recently. Do any of you physicists out
>> > there know how the touch screen works?
>>
>> Infrared beams...at least for the HP 150 A and B.
>>
>> The first two models had visible holes where dust could get in and obscure
>> the IR LEDs. Later, HP added an IR-transparent bezel over them to avoid
>> that problem.
>
>Hey. I've got one of those, just the IR hardware, not the CPU or monitor.
>I picked it up at the Dayton Hamfest a couple of years ago because it looked
>neat.
>
>Is there enough information out there to attempt to interface one of these
>units to another kind of computer? There is a ribbon cable with fifteen
>to twenty wires coming off of one side.
Sounds like you got one touch screen parts for the later TouchScreen II
computer. It was an option on that computer and some terminals. It was
built into the HP 150. I THINK that all you have is a bezel with two rows
of LED IR emitters and two rows of photo receptors. All you had to do to
install it on the TS II was to pop out the old bezel, plug in the cable and
snap this bezel in place.
Joe
>
>-ethan
>
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Received on Mon May 10 1999 - 16:36:40 BST