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Arduino Compatible TFT LCD module

PostPosted: Fri Jul 12, 2019 11:27 am
by referred
This Arduino compatible TFT screen has a colour backlit 1.77" LCD with a resolution of 160 x 128 pixels. Designed primarily for the Arduino Esplora (search for HCDVBD0014 in our shop) it had easy to access headers and communicates via SPI and so can be easily used with other Arduino boards such as the Uno, Mega, and Leonardo. The LCD is compatible with the Arduino TFT library and Esplora example TFT sketches.

Re: Arduino Compatible TFT LCD module

PostPosted: Fri Jul 12, 2019 11:28 am
by bozoned
referred wrote:This Arduino compatible TFT screen has a colour backlit 1.77" LCD with a resolution of 160 x 128 pixels. Designed primarily for the Arduino Esplora (search for HCDVBD0014 in our shop) it had easy to access headers and communicates via SPI and so can be easily used with other Arduino boards such as the Uno, Mega, and Leonardo. The LCD is compatible with the Arduino TFT library and Esplora example TFT sketches.



I've been having the same problem the backlight is very dimmed i tried a fading command on PWM PIN to check the max intensity but still not great at full scale the white is more greyish than white. I'm also having issues regarding colors. I'm using a arduino nano with that screen and i also used a UNO just in case. If i upload a image white BG and pink logo the logo becomes blue on the display same issue if i program colors by RGB or color code. Any idea why?

Re: Arduino Compatible TFT LCD module

PostPosted: Fri Jul 12, 2019 11:28 am
by fliskshomely
Yes and the same happens with text colors. Black and white are right but after the colors seem to be in different order. Same if I use the tftgraph example I end up with purple and blue so in that case the yellow becomes purple and pink becomes blue. Ive noticed that if I change the order of the colors for text I can get the right color.

Re: Arduino Compatible TFT LCD module

PostPosted: Fri Jul 12, 2019 11:28 am
by bouncylocation
Yes in the sketch that's what i've been doing and that's simple enough to be honest. But I don't know what to do when i use a BMP how do i change that? I've tried to convert it to CMYK but with no joy. Still had the color problem on the screen. Thank you for your help.

Re: Arduino Compatible TFT LCD module

PostPosted: Fri Jul 12, 2019 11:28 am
by referred
bouncylocation wrote:Yes in the sketch that's what i've been doing and that's simple enough to be honest. But I don't know what to do when i use a BMP how do i change that? I've tried to convert it to CMYK but with no joy. Still had the color problem on the screen. Thank you for your help.



Yes in the sketch that's what i've been doing and that's simple enough to be honest. But I don't know what to do when i use a BMP how do i change that? I've tried to convert it to CMYK but with no joy. Still had the color problem on the screen. Thank you for your help.

Re: Arduino Compatible TFT LCD module

PostPosted: Fri Jul 12, 2019 11:29 am
by bozoned
With regards to the backlight, the only thing I can suggest is a small modification to the module. On the back of the module there is a small black surface mount resistor marked 331. If you where to change this to something slightly lower such as a 220 ohm resistor, this will improve the backlight. I've check this by simply adding the resistor across the 330R and it made an improvement in brightness. Backlight current consumption increased from 4mA to 8mA. I'm going to contact the factory and speak to them about this. I do however have to make the disclaimer that any modification like this to the board will invalidate its warranty so if you do choose to modify it you do so at your own risk. More Info here https://www.stoneitech.com/application

Re: Arduino Compatible TFT LCD module

PostPosted: Fri Jul 12, 2019 11:29 am
by bouncylocation
bozoned wrote:With regards to the backlight, the only thing I can suggest is a small modification to the module. On the back of the module there is a small black surface mount resistor marked 331. If you where to change this to something slightly lower such as a 220 ohm resistor, this will improve the backlight. I've check this by simply adding the resistor across the 330R and it made an improvement in brightness. Backlight current consumption increased from 4mA to 8mA. I'm going to contact the factory and speak to them about this. I do however have to make the disclaimer that any modification like this to the board will invalidate its warranty so if you do choose to modify it you do so at your own risk.



I've tried as you suggested but i thought it was still very dimmed so instead i put 110ohm resistors between the 5V and the pin of the BL resistor and it's working great so far. Your support was great however I must say when i buy a shield like this i expect to use it on a plug and play basis. Anyway I've got 4 more of those screens to modify now arrrg