What LCD does the Unicorn use?

[Krumlink]

Today I received and assembled my unicorn LCD experimenter, and was wondering what LCD does it use and what controller, because when I plugged in my Hitatchi 44780 LCD it did not even power up. Thanks

 

[futz]

Today I received and assembled my unicorn LCD experimenter, and was wondering what LCD does it use and what controller, because when I plugged in my Hitatchi 44780 LCD it did not even power up. Thanks

Almost any standard pinout 44780 will work. The pinout on the far right of **broken link removed** is standard. The only optional part would be the BL (backlight pins), and even they seem to be fairly standardized.

Make sure you have a jumper on J1.

 

[Krumlink]

Hmm I wonder why mine would not power up.

 

[blueroomelectronics]

You also need to install the jumper J1 and adjust contrast. Remove J1 for GLCD displays.

 

[Krumlink]

There we go! Contrast was twisted the wrong way. THe backlight is still not working though, but at least it powered up. Thanks. The backlight on this LCD is wanky anyways. Hey bill do you have any spare LCD's (blue backlight) I can buy off you?

 

[blueroomelectronics]

The backlight is software controlled

 

[futz]

The backlight is software controlled

Set RB3 high to turn it on. Look on the schematic and you'll see there's a 2N2222 controlling the ground line.

 

[Krumlink]

Yeah just saw that.

 

[Krumlink]

Just made a jumper that shorts out the transistor to have backlight on. I can still PWM if needed.