The Adafruit 2.8in. TFT LCD Touchscreen Display brings QVGA graphics to your next project using only 5 x SPI pins or 12 x GPIO pins if you can spare them. The screen is bright with a 4-LED backlight and can display 18-bits of colour (262,000 colours). There's a display controller built in so your microcontroller doesn't need to get involved in refreshing the screen, it just has to write the pixels once then it can move on to other tasks. SPI mode uses less pins but is slower while 8-bit mode uses more pins and is faster, the choice is up to you. Adafruit have software and tutorials to support you whichever mode you decide to use, see the links below. The board also has a micro-SD card socket that you can use to store files and images.
Imagine what you could do with this if only it had a touch screen. Of course you don't need to imagine, because the display has a built-in resistive touch screen. Because it uses resistance to detect touch, this screen will work with a finger, a stylus, the non-writing end of a pen or even a gloved finger. Anything that can put pressure on the screen will register a touch. The touch screen uses a further 2 x digital pins and 2 x analogue inputs regardless of whether you use SPI or 8-bit mode to drive the display.
Supplied as a fully assembled and tested display with a strip of 0.1in. header pins for you to solder on as required.
- 2.8in. diagonal touchscreen TFT LCD
- 240 x 320 resolution, 18-bit colour
- Use in SPI mode or 8-bit mode
- Micro-SD socket
- 3.3 to 5V compatible
- 3.3V LDO regulator on board
- Adafruit part no.: 1770
Visit https://learn.adafruit.com where Adafruit provide
a free tutorial for the Raspberry Pi, and another
tutorial for the Arduino. They also have an open source library to drive the display in
8-bit mode, and another to use
SPI mode. Please note that while the screen is capable of 18-bit colour, the Adafruit code uses 16-bits for efficiency. It's highly unlikely that you'll ever notice any difference.
*Customers looking to resell on eBay or Amazon should contact Adafruit directly.
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