Re: TI-H: EL Backlights? A LA TI-92
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Re: TI-H: EL Backlights? A LA TI-92
>From: <IGGYBIG@aol.com>
>> is it posible to run the backlight off of the main batts vs. the batt
>> pak,also is that the ti-92 version?
>
>If it will run off of 6 volts or less you can. One thing to watch out for
>though is that sometimes an inverter can put enough noise into the system to
>effect the system clock, and the calc will run really slowly. I'm not sure
>exactly what the cause of this is, or if it will happen with inverters other
>than the particular model I was using. It only happened on 2 out of about
>30 calculators. One of them I could not find a fix for, the other was fixed
>by including a 10 ohm series resistor in the inverter power lead.
>Anyway, the external battery pack seperates the power supplies and
>eliminates the possability for those problesm. 'Course, I'd hate to have to
>carry around a battery pack.
>
>If the inverter draws too much power it can cause the voltage to sag a bit,
>which can make the LCD hard to see. Not a problem with fresh batteries tho.
>
>Attempting to power the inverter off of two of the 4 batteries in the calc
>would probably not be a good idea. It would drain the batteries unevenly
>and result in shorter battery life. Instead put a voltage regulator on the
>positive supply and draw your power from it.
You could rewire the battery pack to include 2 sets of 2 batteries,
providing 3v.
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