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Kensington Orbit trackball - wired blue optical with scroll ring - £20.99 @ Amazon
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Kensington Orbit trackball - wired blue optical with scroll ring - £20.99 @ Amazon

16
Posted 29th Nov 2019

This deal is expired. Here are some options that might interest you:

Trackball with scroll ring, blue 40mm ball

Just over the free delivery amount as well
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16 Comments
Very good. Mine needs cleaning periodically as I'm dirty.
Mine need the micro switches replacing every couple of years, thought I'd save getting the soldering iron out this time round
Mine is showing even cheaper but for the grey version at £13.99 , tempted to get it for work
Edited by: "LillyM" 29th Nov 2019
LillyM29/11/2019 18:58

Mine is showing even cheaper but for the grey version, tempted to get it …Mine is showing even cheaper but for the grey version, tempted to get it for work



The grey one is optical still, but no scroll wheel
Make sure you get the scroll ring version
LillyM29/11/2019 18:58

Mine is showing even cheaper but for the grey version at £13.99 , tempted …Mine is showing even cheaper but for the grey version at £13.99 , tempted to get it for work

'Centipede, Millipede, Tempest, Missile Command' MAME

maxmix
Scoobyed29/11/2019 19:00

The grey one is optical still, but no scroll wheel


Muzzzzzzz29/11/2019 19:02

Make sure you get the scroll ring version


Ok, I didn’t even know there were such things thanks for the heads up
I bought the grey one an the blue one lol

maxmix
Will this improve productivity when compared to mouse.

I use 1 x ultrawide and a laptop for writing up course work

Requiring loads cut paste editing and work on .doc
These are amazing if you want to really up your online gaming
LillyM29/11/2019 19:05

Ok, I didn’t even know there were such things thanks for the heads …Ok, I didn’t even know there were such things thanks for the heads up


They've been around since 1946! I guess you've never lived until now

"The trackball was invented as part of a post-World War II-era radar plotting system named Comprehensive Display System (CDS) by Ralph Benjamin when working for the British Royal Navy Scientific Service.[2][3] Benjamin's project used analog computers to calculate the future position of target aircraft based on several initial input points provided by a user with a joystick. Benjamin felt that a more elegant input device was needed and invented a ball tracker[2][3] system called the roller ball[2] for this purpose in 1946."
Edited by: "fishmaster" 29th Nov 2019
fishmaster29/11/2019 21:34

They've been around since 1946! I guess you've never lived until now They've been around since 1946! I guess you've never lived until now "The trackball was invented as part of a post-World War II-era radar plotting system named Comprehensive Display System (CDS) by Ralph Benjamin when working for the British Royal Navy Scientific Service.[2][3] Benjamin's project used analog computers to calculate the future position of target aircraft based on several initial input points provided by a user with a joystick. Benjamin felt that a more elegant input device was needed and invented a ball tracker[2][3] system called the roller ball[2] for this purpose in 1946."


You’re right! The world of computer mice is new to me, I still use the clicky ones at work, though I believe it has a wheel bit at the front..but this one looks good and dare I say ergonomical but yes, you are spot on, I haven’t lived
LillyM29/11/2019 21:40

You’re right! The world of computer mice is new to me, I still use the c …You’re right! The world of computer mice is new to me, I still use the clicky ones at work, though I believe it has a wheel bit at the front..but this one looks good and dare I say ergonomical but yes, you are spot on, I haven’t lived


Do you want to know when the computer mouse was invented? OK I guess you don't have much choice as I'm going to tell you anyway It was in 1963 and the first prototype was created in 1964. Most of the computer technology we have today was already thought of and invented in the 1960's and much of it is just refinement of that technology and some of it still hasn't been fully realised.
fishmaster29/11/2019 21:49

Do you want to know when the computer mouse was invented? OK I guess you …Do you want to know when the computer mouse was invented? OK I guess you don't have much choice as I'm going to tell you anyway It was in 1963 and the first prototype was created in 1964. Most of the computer technology we have today was already thought of and invented in the 1960's and much of it is just refinement of that technology and some of it still hasn't been fully realised.


Very insightful, so the tracker ball was invented before the mouse and then some genius put 2 and 2 together and came up with this? (obviously not THIS one, but this design)... anyway, might look into getting one, but thank you for the interesting facts 😁
LillyM29/11/2019 21:54

Very insightful, so the tracker ball was invented before the mouse and …Very insightful, so the tracker ball was invented before the mouse and then some genius put 2 and 2 together and came up with this? (obviously not THIS one, but this design)... anyway, might look into getting one, but thank you for the interesting facts 😁


A mouse was originally an upside down trackball, works exactly the same way, then optical mouse with a led or laser were invented and there are now no moving parts for the tracking system. Now trackballs also use optical system instead of little wheels, before the optical scanning system, there were two wheels one for X axis and the other for Y axis, as the ball moved around it moved the two wheels, the wheels have little holes in them and when there isn't a hole it breaks the light from the light sensor and this information is transmitted to the computer to give position information. It's simple in practice but the hard part is actually thinking of it in the first place

It was common to have to clean the dirt build up from inside the mouse wheels that the ball rotated against here's a pic of how things used to be, see how the underneath resembles a trackball. The mouse became much more popular than the trackball. Mice and balls have never been so interesting or maybe not

39196068-IDz5a.jpg
Edited by: "fishmaster" 29th Nov 2019
I remember those 😁, I use to remove the plastic cover and play with the ball inside. You are very knowledgeable about computer mice!! I haven’t got £20 to spend on a mouse for work at the moment, what with Xmas around the corner, but should I decide to buy one, I might tap into tour knowledge and see if the one I want to buy is worth it
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