A round TFT color screen to show eyes, clock, speedmeter, etc
This is a 2.2” TFT LCD Display Module with an input voltage of 3.3V~5.5V, which is used to display colorful patterns and characters.
This screen work in 16 bits colors. The Arduino library already defines 19 common colors but you can customize your own ones.
The round TFT is cut inside a squared TFT screen which have a size of 128 x 128 pixels. (visible area make 1.26" diameter)
The usual axis reference is on the top-left corner of the squared TFT screen. So the x=0, y=0 is outside the visible area of the round screen.
As the screen is round, the best is to "virtually" move the origin coordonate from the top-right right in the middle of the screen (see pictures). With this new coordinates, the maximum values for positive axis will be +64 and will be -64 for negative part of the same axis.
The fastest screen refresh speed is about 256ms (10 Hertz max). The module is able to display multiple patterns in a cycle and realize dynamic display effect.
- Supply Voltage: 3.3V to 5.5V DC
- Operating Current: 40mA
- Display Color: 16 bit colors
- Resolution: 128 x 128 pixels
- Refresh Rate: 10Hz max
- Interface Type: SPI
- Operating Temperature: -30℃ to +70℃
- Dimension: 46×49 mm
- Controler: ST7687S
- View angle: 180° according to the TFT datasheet
- ST7687S driver datasheet