Re: [lcd4linux] Re: Everbouquet 44780 modules

[Aragon G. <ar...@ph...>]

| By Aragon Gouveia <ar...@ph...>
|                                          [ 2004-02-16 10:29 +0200 ]
> > >The reason I'm asking is because I have one, and I can't help but notice
> > >some of the unused circuitry on it.  There are pads for a transistor and a
> > >bunch of resistors which looks unmistakebly like a switching circuit
> > >attached to the LED backlight Anode.  The base of the transistor pads leads
> > >through a resistor pad into one of the controller chips.
> > >
> > >I'm thinking that perhaps these modules have an undocumented 44780 command
> > >to toggle the backlight on and off, maybe even to adjust its intensity 
> > >too. I've tried mailing them asking this, but so far no luck with useful 
> > >replies. 

Whoops, I cut off the first part without thinking.

This is in reference to 44780 modules manufactured by Everbouquet/Wayton. 
Their part numbers resemble MC1602, MC2002, MC2004, MC4004, etc.  If you
have one, read above. :)


Regards,
Aragon