CompTIA: Laser Printing Process

Filed Under (Geekery) by Ben on 07-03-2010

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Cleaning – The Rubber Blade removes any excess toner which drops into the debris cavity. The eraser lamp that removes any excess charge off the photosensitive drum. This leaves the drum with a charge of 0 Volts

 

Conditioning – The primary corona (High Voltage Wire) adds a negative charge of around -600 volts to – 1000 volts

 

Writing – The laser light hits the photosensitive drum, where the light hits the drum it dissapates the negative charge to the centre of the drum which is grounded. This then leaves sections of the drum with a voltage of -100 volts

 

Developing – The drum rolls through a supply of negativly charged toner particles (Particles are -200 Volts to -500 Volts)

 

Where the drum hasnt been touched by the laser light a lower negative charge is still there, so the particles are not attracted to this section of the photosensitive drum.

 

Transfer – A strong positive charge is applied the the paper, the particles of toner are attracted to the paper.

 

Fusing – The toner that is on the paper is heated and pressurised, the toner becomes bonded to the paper.

 

Mnemonic to remember:

Cool Cowboys Will Drive Their Fords

via http://www.proprofs.com/forums/index.php?cmd=showentry&eid=30&blogid=1&autocom=blog

 

CompTIA: Monitor Resolutions

Filed Under (Geekery) by Ben on 07-03-2010

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Name X Pixels Wide Y Pixels Wide
VGA 640 480
SVGA 800 600
XGA 1024 768
XGA+ 1152 864
SXGA 1280 1024
SXGA+ 1400 1050
UXGA 1600 1200
QXGA 2048 1536

 

via http://en.wikipedia.org/wiki/File:Vector_Video_Standards2.svg

Gowalla vs Foursquare

Filed Under (Geekery) by Ben on 06-03-2010

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The official Gowalla app finally came out for the Android operating system yesterday and I’ve been waiting to write a Gowalla vs Foursquare post for a while now.  However, after using the Gowalla app for a day, I’ve decided I can’t REALLY write anything on it because it sucks so horribly bad.  I hate that too.  I’ve been rooting for the Gowalla app team for a while now and every now and then, I’ll even use the mobile site, m.gowalla.com.  Their design is a lot cleaner than Foursquare and I like the way it shows local venues.

 

But… The Gowalla app has COMPLETELY locked up my Droid 3 times now.  The whole thing just shuts down and I have to do a battery removal.  Also, Auto Wi-Fi use.  Why can’t it just use the GPS system like EVERY OTHER APP ON THE MARKET?  For some reason, it turns on my Wi-Fi connection in an attempt to better find my location.  This was probably my biggest irk for the Gowalla app.  I won’t write an official VS post until a newer app comes out…it’s just not a fair fight.

 

In the mean time…here are some Gowalla Mobile vs Foursquare pics.

 

Why Apple Won’t Include Flash on iPhone

Filed Under (Geekery) by Ben on 03-03-2010

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Everyone keeps speculating what Cupertino’s problem with adding Adobe Flash to their iPhone and the upcoming iPad is.  Most side with Apple with the thought that Flash is just too great a resource hog to run on the phone. Of course, I don’t know if this is true or not, but I do know that my Motorola Droid runs on a processor that’s 50mHz slower and it multitasks and transitions with no hick-ups.  I really don’t think that a bogged down processor is the problem

 

The fact is that if Flash was allowed on the phone, Apple’s closed source, closed market would falter because at least 80% of the apps are available for free in Flash format.

 

Why would someone pay for Apple’s top selling apps  Bejeweled 2($2.99)  or even Tetris ($4.99!) when you can surf over to Goriya or OnlineFlashGames?  There are plenty of apps that Flash can replace for free.

 

….seriously? $4.99 for Tetris?…

 

Top iPhone app downloads via The Apple Blog

CompTIA: Intel Processors

Filed Under (Geekery) by Ben on 18-02-2010

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Chip Year Added Data Bus Width Address Bus Width Speed(MHz)
8080 1974 8 8 2
8086 1978 16 20 5~10
8088 1979 8 20 4.77
80286 1982 16 24 8~12
386DX 1985 32 32 16-33
386SX 1988 32 24 16-20
486DX 1989 32 32 25-50
486SX 1991 32 32 16-33
487SX 1991 32 32 16-33
486DX2 1991 32 32 22-66
486DX4 1992 32 32 75-100
Pentium 1993 32 32 60-166
Pentium Pro 1995 64 32 150-200
Pentium II 1997 64 64 233-300
Pentium II Xeon 1998 64 64 400-600
Celeron 1999 64 64 400-600
Pentium III 1999 64 64 350-1000
Pentium III Xeon 1999 64 64 350-1000
Pentium 4 2002 64 64 1000-3000

CompTIA: Processors

Filed Under (Geekery) by Ben on 18-02-2010

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Here’s a chart I’ve made for Socket Types and the supported processors.

 

Connector Processor
Socket 1 486 SX/SX2, 486 DX/DX2, 486 DX4 Overdrive
Socket 2 486 SX/SX2, 486 DX/DX2, 486 DX4 Overdrive, 486 Pentium Overdrive
Socket 3 486 SX/SX2, 486 DX/DX2, 486 Pentium Overdrive
Socket 4 Pentium 60/66, Pentium 60/66 Overdrive
Socket 5 Pentium 75-133, Pentium 75+ Overdrive
Socket 6 DX4, 486 Pentium Overdrive
Socket 7 Pentium 75-200, Pentium 75+ Overdrive
Socket 8 Pentium Pro
Socket 370 Pentium III
Socket 423 Pentium 4
Socket 478 Pentium 4 and Celeron 4
SECC (TypeI), Slot 1 Pentium II
SECC (TypeII), Slot 2 Pentium III
Slot A Athlon
Socket 603 Xeon
Socket 754 AMD Athlon 64
Socket 939 Some version of Athlon 64
Socket 940 Some version of Athlong 64 and Opteron
Socket LGA775 Core 2 Duo/Quad
Socket AM2 Athlon 64 family
Socket F Opteron