ECN Electrical Forum - Discussion Forums for Electricians, Inspectors and Related Professionals
ECN Shout Chat
ShoutChat
Recent Posts
Increasing demand factors in residential
by gfretwell - 03/28/24 12:43 AM
Portable generator question
by Steve Miller - 03/19/24 08:50 PM
Do we need grounding?
by NORCAL - 03/19/24 05:11 PM
240V only in a home and NEC?
by dsk - 03/19/24 06:33 AM
Cordless Tools: The Obvious Question
by renosteinke - 03/14/24 08:05 PM
New in the Gallery:
This is a new one
This is a new one
by timmp, September 24
Few pics I found
Few pics I found
by timmp, August 15
Who's Online Now
0 members (), 255 guests, and 16 robots.
Key: Admin, Global Mod, Mod
Previous Thread
Next Thread
Print Thread
Rate Thread
#131428 08/09/03 11:19 AM
Joined: Aug 2001
Posts: 7,520
P
pauluk Offline OP
Member
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?

#131429 08/10/03 05:33 PM
Joined: Apr 2002
Posts: 2,527
B
Moderator
Use a light pen on the CRT or something else?

#131430 08/11/03 01:44 AM
Joined: Jul 2002
Posts: 8,443
Likes: 3
Member
Paul,
This is one thing that I have wondered for years.
How does a Light Pen work?. [Linked Image]

#131431 08/11/03 01:19 PM
Joined: Aug 2002
Posts: 1,081
T
Member
Paul:

Do you mean these ?

#131432 08/12/03 06:41 AM
Joined: Aug 2001
Posts: 7,520
P
pauluk Offline OP
Member
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
Joined: Jul 2002
Posts: 8,443
Likes: 3
Member
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]


Link Copied to Clipboard
Powered by UBB.threads™ PHP Forum Software 7.7.5