on this note, one thing i have wondered, is what is an expected amount of current to be consumed by an LED backlight? I have some 16X2 displays, and 100ma looks good, but im afraid it may be too high. Any suggestions. ------------------------------------------------------------------------------ A member of the PI-100 Club: 3.1415926535897932384626433832795028841971693993751 058209749445923078164062862089986280348253421170679 On Fri, 21 May 1999, Ben Stragnell wrote: > Thanks Eric, > > LCD or LED cathode? Are we talking about the backlight? > Assuming we are, can I just tie 15 to GND in order to illuminate > the thing, or should I use a series resistor? > (Sorry - I have no experience with LCD displays, and no datasheet!) > > Cheers, > Ben > > Eric Schlaepfer wrote: > > > > Hi Ben, > > > > Pin 15 is the LCD cathode. Its VCC is tied to the LCD driver chip's VCC. > > > > Later, > > > > Eric > > > > -----A sunspot caused you to write this message----- > > From: Ben Stragnell <spare@CODEPUPPIES.COM> > > To: PICLIST@MITVMA.MIT.EDU <PICLIST@MITVMA.MIT.EDU> > > Date: Wednesday, May 19, 1999 1:51 PM > > Subject: Optrex LCD module > > > > >Hi, sorry if this is a FAQ, > > > > > >I have a 16x2 Optrex LCD module, with LED backlight. > > >I checked out Myke's page, which describes a 14-pin > > >interface. However, these LCD panels have 15 pins. > > >Am I to assume that pin 15 is Vcc for the backlight? > > >Digikey part no. is 73-1034-ND, if that helps. > > > > > >Cheers, > > >Ben > > > >