Ashley,

Sounds like fun.  My only pointer would be that you're not going to
backlight an LCD with only 5-8mA, unless maybe you pulse the LEDs and
they're super-efficient(?)  A CCFL-type backlit display *might* run off
that kind of power (don't quote me on this) but they usually require
hi-volts low-power inverters to drive them, which may not be incredibly
efficient.

Cheers,
-Dave.

Ashley Roll wrote:
>
> Hi Everyone,
>
> Sorry if this is a repost, my cable internet provider had major problems
> with their mail system and I didn't see it come through last night so I sent
> it again..
>
> I'm investigating the possibility of developing a product with the
> PIC16C923, using its LCD Driver. Has anyone used these and wouldn't mind
> helping me with some questions about suitable LCDs and their drive
> requirements. I haven't worked with LCDs before (apart from the generic text
> modules). I'd be getting custom glass made for the device (about 65-70
> segments). Just so I know what I'm getting myself in for :)
>
> Oh the device will be a small (pager sized) battery powered (1 AA cell?)
> device. So does anyone have any tips for step-up switch mode converters? I
> was looking at the
> MIC2571-1 (www.micrel.com). 5V @ 5mA or 3.3V @ 8mA from a 1.5V cell should
> be plenty for the PIC/LCD, but I'm concerned with the backlights.. I figure
> I'll need a few LEDs in there to light the LCD and possibly the keypad..
>
> Are there any cheaper/easier alternatives? Should I just let the LCD
> manufacturer put a controller on the LCD and talk to that with a smaller
> PIC?
>
> Thanks for any pointers you can give me.
>
> Cheers,
> Ash.
>
> ---
> Ashley Roll
> Digital Nemesis Pty Ltd
> www.digitalnemesis.com
> Mobile: +61 (0)417 705 718
>
> --
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--
David Venz (Software Engineer)
Foxboro Australia Pty Ltd (ACN 000 522 261)
10 Brandl Street, Eight Mile Plains, QLD, 4113, Australia
Direct Line: +61 (0)7 3340 2192
Switchboard: +61 (0)7 3340 2111
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Email Address: davidv@foxboro.com.au
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