Re: TI-H: EL slows my processor!?!?! WHAT!
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Re: TI-H: EL slows my processor!?!?! WHAT!
Okay...you said it has no shorts and you've done els' before about 3 times
here... I get the point. :)
How long are the wires leading to the capacitors? Wires a little introduce
capacitance. How 'new' are the batteries? Is the inverter internal, and
if so, is it properly shielded from the calc with the tin foil thing?
Grant
>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