Re: [uCsimm] LCD issues

From: Steve Walker (stevewalker@mac.com)
Date: Mon Jun 26 2000 - 20:15:48 EDT


Thanks for the LCD info. Where can I find documentation for the touch panel? It also came with no pinout. - Steve Walker

On Mon, 26 June 2000, Tom Walsh wrote:

>
> Filip Peters wrote:
> >
> > Hello Tom,
> >
> > Tom Walsh wrote:
> >
> > > In case anyone needs data on the Sharp LM32019 display, it can be found
> > > at:
> > > 'http://www.openhardware.net/ez328simm/technotes/Sharp-LM32019.pdf'. In
> > > order to use this display, you will need a connector, Molex P/N
> > > 52044-1245, and a High Voltage inverter which they also will sell you at
> > > Earthlink (same people for the LCD), the LCD is quite useless without
> > > the backlight supply.
> > >
> > > When you get the LCD + supply, DO NOT HOOK IT UP, until you have
> > > correctly identified the polarity to use for the 12 supply to the HV
> > > Inverter (I destroyed one discovering this). The GROUND connection can
> > > be identified with an OhmMeter, there were four mounting holes on the
> > > unit they supplied me with (2 holes + 2 slotted), one of the mounting
> > > holes will have a plated-through copper land around it, this is the
> > > GROUND connection (Pin 2), the other connection is the +12 volt line
> > > (Pin 1).
> > >
> >
> > I had also a defective inverter. I don't think I destroyed it by reverse polarity, I
> > was very carefull in checking the polarity, but when I powered it up I had no
> > backlight. Probably the fuse on the inverter is a bit trigger happy, and blew when I
> > connected it. It's the little black SMD thingy next to L1, labelled with 0.5A. When I
> > bridged it with a short piece of wire I had a working inverter! So you can still use
> > this inverter for experimental work (probably not for sending it to a customer..)
> >
> > Greetings,
> >
> > Filip.
> >
> > --
> > Ir. Filip Peters
> > fp@metris.be
> >
> > This message resent by the ucsimm@uclinux.com list server http://www.uClinux.com/
>
>
> Filip,
>
> Thanks for that observation, I "glanced" at the blown board, but didn't
> see a fuse. I'll look again.
>
> Regards,
>
> TomW
>
> --
> Tom Walsh - WN3L - Embedded Systems Consultant
> 'www.openhardware.net', 'www.cyberiansoftware.com'
> "Windows? No thanks, I have work to do..."
> This message resent by the ucsimm@uclinux.com list server http://www.uClinux.com/

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