>-----Original Message-----
>From: piclist-bounces@mit.edu [mailto:piclist-bounces@mit.edu] 
>Sent: 08 December 2005 03:20
>To: Microcontroller discussion list - Public.
>Subject: Re: [EE] Cute little 4-digit display...
>
>
>size and weight is one point. But, 
>only 4 digits? it is not suitable for 
>pic type device at all. pic has much 
>more information than one line of 
>number, be needed to display.
>No display, no function, am I right?
>

The amount of information you need to display is hardly related to the power of the microprocessor.  Most of my projects use the largest available 18F parts, and have no display at all...

>Also, now a day hd447800 lcd module
>can be very thin (even with EL backlight)
>and very small. For the sake of size and weight,
>to pay $12 and lost capability of neccessary 
>information display? it is absolutely wrong doing.
>

But having more than 4 digits may not be neccesary!  Why use a huge 2*16 display if you only need to display the numbers 0-9999?  A 2x16 display won't even fit into many/most "hand held" instrument style project boxes.

>Before I met the point to choose one line 7-seg
>number or 2*16 lcd module? After some 
>comparing I reached conclusion: all of my 
>future pic project will be using at least 2*16.
>By the way, firmware for 2*16 is even smaller.
>

Why have you decided that all of your projects will have some kind of user interface?  Embedded controllers with no user interface whatsoever are very, very common.

If you can use an MSSP module to provide the I2C, I suspect the firmware might actually be smaller.  And of course, if you already have I2C devices such as EEPROM etc. then the code will be much, much smaller.

Regards

Mike

=======================================================================
This e-mail is intended for the person it is addressed to only. The
information contained in it may be confidential and/or protected by
law. If you are not the intended recipient of this message, you must
not make any use of this information, or copy or show it to any
person. Please contact us immediately to tell us that you have
received this e-mail, and return the original to us. Any use,
forwarding, printing or copying of this message is strictly prohibited.
No part of this message can be considered a request for goods or
services.
=======================================================================

-- 
http://www.piclist.com PIC/SX FAQ & list archive
View/change your membership options at
http://mailman.mit.edu/mailman/listinfo/piclist