Date: Sat, 24 Feb 2001 00:00:55 -0000
From: "Matthew Hanson" <[EMAIL PROTECTED]>
Subject: RE: Help this fuul out (Ha, beat you, Pres!)
>From: "neil barnes" <[EMAIL PROTECTED]>
>Date: Fri, 23 Feb 2001 08:35:07
>Can't answer without guessing as I don't know how the screen mod works...I
>recall though one mod which appeared to be a filter over the screen
A 'filter'? Would this also include a brighter light as you describe next?
>Given that
>the 'screen' bit of an LCD screen doesn't have any light generating
>function, the only real way to make a screen brighter is to put a brighter
>light behind it...have you seen how bright LCD projectors are?
But wouldn't whatever is going to create more light, also consume more
power?
>Re the batteries: when a battery is charging and discharging, there is a
>chemical change *somewhere* in there - e.g. lead to lead sulphate in a lead
>acid battery. The speed at which that reaction can take place is
>proportional mainly to the surface area exposed to the electrolyte, and
>theconductivity thereof.
>
>Cells are normally defined as having a given capacity in (milli)amp-hours
>-when the current is taken at a specified rate. This rate is normally a
>long way short of the maximum the battery can supply but is a rate at which
>the chemical byproducts are easily absorbed. If the current pull is
>increased, the byproducts get in the way of the >reaction you need until
>they can be removed (converted back) by recharging. This effectively stops
>the cell working - so at a low rate, the capacity in Joules
>(=amps*volts*time) is higher than at a high rate.
Okay! That makes a lot of sense. These are the sort of thing I need to
know before I can really get the wondering out of my head. Thanks Neil!
Matt
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