hi, sorry for my bad english,
this is my first arduino project, but before i put the project, i like to do some "hello world" on LCD display,
after i watch some video tutorial, i try the arduino mega 2560 + i2c + LCD 16 x 2,
but when i test only with ground and vcc 5, the result is the pictures that i upload in attachment,
-is that correct default for only ground and vcc cable connected?
-what wrong if that condition not correct? the i2c, the LCD, or my soldering?
any tips or guide i will appreciate it, thanks
note some error upload so only 2 of my 3 pic uploade, i try reupload
OK, so it appears you have the contrast set more-or-less appropriately and see the "blocks".
You have not initialised the display - but if you do not have it connected to an (appropriately coded) Arduino, that is OK.
Photos otherwise useless to check details.
The best way to do this unless your workshop is lit by multiple floodlamps, is to take it outside in full daylight but not direct sun and use a digital camera (that is, not to be confused with a telephone) at least a metre away from directly above (or very slightly offset to ensure all the connections are able to be distinguished) using the (actual) zoom to just include all parts of the assembly.
Paul__B:
OK, so it appears you have the contrast set more-or-less appropriately and see the "blocks".
You have not initialised the display - but if you do not have it connected to an (appropriately coded) Arduino, that is OK.
Photos otherwise useless to check details.
The best way to do this unless your workshop is lit by multiple floodlamps, is to take it outside in full daylight but not direct sun and use a digital camera (that is, not to be confused with a telephone) at least a metre away from directly above (or very slightly offset to ensure all the connections are able to be distinguished) using the (actual) zoom to just include all parts of the assembly.
yes that right at one line all is full of block, other line is empty,
by the way its quite dark . its 6pm in my place, and i dont have digital camera,
and a question, its the lcd and i2c have memory, so if the i2c lost of power, the data still same as before lost power?
So now, connect up the I2C pins (as well as the power) to the Arduino, install the hd44780 library in the IDE if you have not already done so and run some of the examples from that library.
