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#131428 - 08/09/03 11:19 AM Light pen  
pauluk  Offline
Member
Joined: Aug 2001
Posts: 7,520
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 05:33 PM Re: Light pen  
Bjarney  Offline
Moderator
Joined: Apr 2002
Posts: 2,527
West-Southern Inner-Northeast ...
Use a light pen on the CRT or something else?


#131430 - 08/11/03 01:44 AM Re: Light pen  
Trumpy  Offline


Member
Joined: Jul 2002
Posts: 8,211
SI,New Zealand
Paul,
This is one thing that I have wondered for years.
How does a Light Pen work?. [Linked Image]


Let's face it, these days if you're not young, you're old - Red Green grin

#131431 - 08/11/03 01:19 PM Re: Light pen  
ThinkGood  Offline
Member
Joined: Aug 2002
Posts: 1,081
Milwaukee, WI
Paul:

Do you mean these ?


#131432 - 08/12/03 06:41 AM Re: Light pen  
pauluk  Offline
Member
Joined: Aug 2001
Posts: 7,520
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.


#131433 - 08/16/03 05:52 AM Re: Light pen  
Trumpy  Offline


Member
Joined: Jul 2002
Posts: 8,211
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!. [Linked Image]


Let's face it, these days if you're not young, you're old - Red Green grin


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