Re: TI-H: EL slows my processor!?!?! WHAT!
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Re: TI-H: EL slows my processor!?!?! WHAT!
I know how an RC circuit works. I've looked for shorts, but couldn't find any!
The calc is fine when the EL panel is off, but when i turn it on, the calc
slows down. This is the ONLY calc I've ever seen do this. I alread checked for
shorts , but I just don't know what's happening!
I've done ELs before, and this makes no sense to me??? The batteries aren't
that old.
I know how the RC circuit works, but I'm just curious why the EL would effect
it in any way. It has no shorts I can see. nothing at all, and when the EL is
off, the turbo or normal speed work properly. When it's on, the calc slows. Is
it possible that the capacitor is damaged and not charging in lower voltage
conditions??? Maybe??? I know it charges fine when the EL is off!
Grant Stockly wrote:
>
> Richard don't you know whats wrong? The clock speed for calculators is
> based on the charge and discharge of a capacitor. if it charges and
> discharges at a slower rate the clock rate gets slower... This is
> elementry stuff... :) Ti didn't want to spend money on expensive crystals
> so they used a clock method thats been here for ever... Even I can buy
> crystals...
>
> >Whenever I activate the EL panel, the calc slows down so much you can see it
> >plot the individual letters and lines in the MENUS!!!
> >
> >What's going on! Is there a possible short somewhere??? Does the EL produce
> >interference that could slow the processor?
> >
> >I checked for shorts and stuff, but i see nothing!
> >
> >Has anyone else seen this phenomenon??? I tried a filter capacitor too, but it
> >had no effect. I restored the turbo to it's original un turboed condition, but
> >it still does it? Could the Inverter be imposing an EMF on the clock lines???
> >(It sits DIRECTLY above the memory chip).
> >
> >I did another calc EXACTLY the same, but it's fine. What's going on???
> >--
> >
> >
> >Richard Piotter
> >richfile@prairie.lakes.com
> >
> >The Richfiles TI Hardware and BASIC web page:
> >http://www.geocities.com/SiliconValley/Lakes/5081/Richfiles.html
--
Richard Piotter
richfile@prairie.lakes.com
The Richfiles TI Hardware and BASIC web page:
http://www.geocities.com/SiliconValley/Lakes/5081/Richfiles.html
References: