On Tue, 3 Jan 2006, Philip Pemberton wrote:

> Hi,
>  I've just found a bag of calculator LCDs in my junkbox, complete with
> zebra-strip connectors. Thing is, I have no idea what the pinouts of these
> displays are. Has anyone here ever repurposed a calculator LCD to the point
> of reversing the pinouts and hooking one up to, say, a PIC?
>
>  If not, I'll see about reverse engineering the pinout at some point. I
> guess the best method would be to generate a 3V 50Hz square wave to use as
> the backplane signal, then feed it through an inverter to get the segment
> signal. Then it's just a case of picking two pins and probing the display...
> I suppose I'm going to have to mount it in front of a mirror or something,
> unless anyone can think of another way to probe the contacts on the back of
> the display while still being able to see the front of the display itself...

Use a mains transformer with 6Vac output and use thin copper wire bent 
as 'J's as probes. Tape the display to the table edge.

good luck,

Peter
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