Ramps 1.4 and LCD wiring

Hello,
I'm trying to use a 16x2 LCD and wiring like this link: http://sumpod.com/lcd-wiring-and-electronics, but anything happens!
Does anyone have any idea what could be wrong?

Perhaps you might need a pot about 10K so that you can ajust the display instead of the restistor

I'm using a 10k resistor connecting LCD 1 to 3

Em... The way you have wired it bears little resemblance to the link that you posted

Look at my schematic here

You have wired to the pins at the other end of the AUX-4 Port from the sumpod example.

I have this working using pretty much the same wiring as them.

Have a quick review of your wiring versus the schematic on my website (above) see if it is ok.

Alternatively if you are using Marlin you can alter the pins.h file to your own layout.

Thank you very much!
I wired as your post. Now the LCD is on, but it keeps blank. Whats wrong?
Where i connect the pin 5 of the encoder?
I activated the "#define ULTRA_LCD" and checked the connections at the firmware and everything is ok.

Ok.

Did you use a variable resistor to alter the contrast by adjusting the voltage at pin3 of the LCD?

When you power up your LCD, do you get the test pattern, ie one row blank, the other row completely lit up (a row of blocks)? before the lcd initialises. If you were to program your arduino to do the blink sketch (ie no lcd instructions) this should stay on this way.

Have you tried using a lcd demo sketch from the standard arduino libraries? Getting this to work on RAMPS might be worth doing.

A 10k resistor is not variable. I think that you will need this as Justblair has stated.

I'm using just a 10k resistor.
When i power up the arduino i don't see anything, it just keep blank.
Same thing with the LCD demo

I am guessing then that you need to use a variable resistor as per my schematic. This will allow you to adjust the contrast for your display.

When HD44780 LCD displays start up they normally display that test pattern I described above. If you are not seeing that then there is a good chance that the contrast is set incorrectly.

Its the first thing that I would try so we can rule it out.

All right. Thank you! I'll try to buy one.

Last question:
Where i connect the pin 5 of the encoder?

Not sure which pin will be pin 5,
Your encoder can have several different pins...

Do you mean pin 5 as per my schematic?

Your rotary encoder if it an alps style encoder will have three pins on one side, two pins on the other.

The side with 3 pins will be the encoder part. The middle pin attaches to ground. the other two to pins D33 and D35 on your ramps AUX-4 connector

On the other side of the rotary encoder is two pins that are essentially either terminal of a push button switch. One of these connects to D29 on my schematic, the other connects also to ground. Although you can link it to the middle pin on the other side of the encoder as by now this will be attached to ground..

Yes, my encoder is like yours. Thank you again.