Can't get LCD M1632 to work

Other Hardware Displays
1

I connected LCD m1632 to arduino mega as said in table on link:

Since that didnt work i kept on searching and found diffenent pinout(picture lcd pinout m1632)
I tried that with code in examples under liquidcrystal.h library (Hello world)and i finally got a response, but all that popped on LCD were squares, and each time they appeared they were more blurry. After a minute or so, i realized that the chip on LCD is hot.

Its hard to see all the connections on picture so heres how it is connected:

LCD pin -> arduino pin
1 Vcc ->Vcc
2 GND ->GND
3 ->/
4 RS ->12
5 R/W ->GND
6 E ->11
7 ->/
8 ->/
9 ->/
10 ->/
11 D4 ->5
12 D5 ->4
13 D6 ->3
14 D7 ->2

I am really not sure what to do so i could use some help.

Thanks

lcd pinout m1632.png

1.jpg
1.jpg3264×2448 1.63 MB

2.jpg
2.jpg3264×2448 1.52 MB

2

... Since that didnt work i kept on searching and found diffenent pinout(picture lcd pinout m1632)
I tried that with code in examples under liquidcrystal.h library (Hello world)and i finally got a response, but all that popped on LCD were squares, and each time they appeared they were more blurry. After a minute or so, i realized that the chip on LCD is hot....

Since the chip is hot you probably should have used the other interpretation for the VDD and VSS pin connections. These devices are pretty rugged and they may still perform satisfactorily (but probably not up to specs) if reconnected properly after the abuse.

You also have to make sure that the contrast is set properly, that your actual six control and data pin connections and the library constructor match, and that the R/W pin is grounded.

Don

3

The thing is that if i connect lcd with the first interpretation for the vdd and vss pin connection the lcd doesnt respond. Theres nothing on lcd. Weird thing is that the first interpretation says that the vcc and vdd pins are at 13 and 14 pin, the second interpretation says the vcc and vdd pins are at 1 and 2 pin. The rest i think i connected properly, but still nothing :confused:

4

After a fairly brief look at the information in your first link I would say that the pins on his PC board are numbered backwards from the norm. It is easy to see that his pin 1 is connected to D7 whereas normally you find pin 14 connected to D7.

I have two LCD modules with pins on the end. One has no pin numbers and the other clearly shows the upper right pin as pin 14. Both have D7 connected to that upper right pin.

I would say that your pinout list needs to have VDD and VSS reversed and that you also have to identify which pin on your board is actually pin 1.

Don