I have been trying to get this LCD Display to work but I get a row of Black squares when I power it up. I have followed http://iamsuhasm.wordpress.com/tutsproj/using-lcds/
I havnt used the switches for the enable or data inputs I have just directy wired D7-4 to GND and D3-0 to +5VDC to the LCD to initialize it. Apparently the blocks are because of the contrast setting but I have tried values from 50 ohms (very high contrast) to 1000 Ohms (Very faint contrast) and nothing happens. Im expecting a block to the far left to blink on and off.
Also I think the LED Backlight doesnt work. I have tried using a 100 ohm resistor between the +5VDC line and the +backlight pin but nothing seems to happen, just the blocks.
Can anyone suggest and ideas why this is happening and what I can do to fix it?
I havnt used the switches for the enable or data inputs I have just directy wired D7-4 to GND and D3-0 to +5VDC to the LCD to initialize it. Apparently the blocks are because of the contrast setting but I have tried values from 50 ohms (very high contrast) to 1000 Ohms (Very faint contrast) and nothing happens. Im expecting a block to the far left to blink on and off.
Also I think the LED Backlight doesnt work. I have tried using a 100 ohm resistor between the +5VDC line and the +backlight pin but nothing seems to happen, just the blocks.
Can anyone suggest and ideas why this is happening and what I can do to fix it?