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#131428 - 08/09/03 08:19 AM Light pen
pauluk Offline
Member

Registered: 08/11/01
Posts: 7693
Loc: Norfolk, England
The graphical nature of web pages makes "point & click" devices common, but am I alone in not favoring the now ubiquitous mouse as the ideal device for this task? I've tried trackballs and found them better, but still not ideal.

It's many years since I've used a light pen on a computer, but have been thinking along the lines that this might be the ideal device for navugating web pages.

Does anyone at ECN already use one for this purpose?

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#131429 - 08/10/03 02:33 PM Re: Light pen
Bjarney Offline
Moderator

Registered: 04/10/02
Posts: 2561
Loc: West-Southern Inner-Northeast ...
Use a light pen on the CRT or something else?

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#131430 - 08/10/03 10:44 PM Re: Light pen
Trumpy Offline

Member

Registered: 07/05/02
Posts: 8540
Loc: SI,New Zealand
Paul,
This is one thing that I have wondered for years.
How does a Light Pen work?.
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Let's face it, these days if you're not young, you're old - Red Green grin

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#131431 - 08/11/03 10:19 AM Re: Light pen
ThinkGood Offline
Member

Registered: 08/07/02
Posts: 1084
Loc: Milwaukee, WI
Paul:

Do you mean these ?

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#131432 - 08/12/03 03:41 AM Re: Light pen
pauluk Offline
Member

Registered: 08/11/01
Posts: 7693
Loc: Norfolk, England
No -- It looks as though that company just produces pen "tablets" which are presumably some sort of touch-sensitive device.

I'm talking about the light pen which you actually touch directly onto the CRT screen.

Trumpy,
The pen is basically just a photo-diode and lens assembly which is used to detect the beam as it scans the face of the tube. At the instant the beam is detected on its scan, the system just checks the current X and Y coordinates from the video circuitry and you therefore have a precise indication of where the pen is on the screen.

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#131433 - 08/16/03 02:52 AM Re: Light pen
Trumpy Offline

Member

Registered: 07/05/02
Posts: 8540
Loc: SI,New Zealand
Paul,
Having just read what you have submitted on the workings of a Light Pen, I would be inclined to think that a Light Pen would be the IDEAL tool to use as a substitute for a Mouse/Trackball.
And you would gain a wee bit more space on your desk, too!.
_________________________
Let's face it, these days if you're not young, you're old - Red Green grin

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