QUOTE(jeopardise @ Jan 7 2011, 11:42 AM)
At 5 volts from molex (YES I connects to the red line)
Line 1 and 3 appears darker than 2 and 4. Izzit normal?
No, it is NOT normal.. but you mention if voltage is 6V, then it shows all even brightness...Line 1 and 3 appears darker than 2 and 4. Izzit normal?
If power is sufficient, then it should NOT show uneven lines... use the trimpot connected to pin 3 to adjust until all show the darkness evenly..
You might need current limiting resistor on pin 15 & 16 bcos current from the molex is quite high... (it might work but it would reduce the life of the LCD )