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newbie question

doug

New member
I just bought an LCD, and when when I hooked it up, the backlight comes on when only logic power is applied. When the backlight power is on, it does nothing. Also, I cant get it to display any text. I checked a zillion times on the wiring, nothing is wrong. Any suggestions? Thanks.
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CF Tech

Administrator
Couple of questions:

1) What is the part number?

2) What microcontroller are you using (PIC, AVR, MSP430, 'HC11 etc.)?

3) What is your favorite color?
 

doug

New member
the part number is EW162C1YMY
the microcontroller is an ATmega16
my favorite color is blue

one other thing... i disconnected everything but pins 1 and 2 on the LCD (power and ground) and the backlight still comes on. I apply power to pins 15 and 16 and the backlight does not come on.
 

CF Tech

Administrator
You will want to search for a data sheet for that display.

Good call on the ATmega16.

Sometimes the manufacturer will add some dropping resistors and connect the backlight to pins 1 & 2 to reduce the total number of connection.

These displays will typically not show anything until they are initialized. You can look in CFAH_WinTest for an example.
 
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