Sunflower Shield - 3.5" TFT w/ Cap Touch
SPX-15091
The Sunflower shield from Cowfish Studios enables your Arduino to run extremely responsive
graphics and touch processing while still leaving plenty of processor power for other tasks like
running simulations, sampling sensors, or responding to the user.
The TFT LCD display is a high-quality QVGA (320 x 240, 24 bit color depth) multi-domain display
that is great for viewing from many angles. On top of the display is a very responsive 3.5"
diagonal capacitive touchscreen. This is the kind of touchscreen used on cell phones - not the
frustrating resistive touch technology like you’d find on a payment pad at the Home Depot. There is
also an 8 Ohm 1.25W audio amplifier with a poke-home connection for the included speaker. What’s
the best part of all these goodies? Thanks to the Bridgetek FT813 Graphics Controller IC with
Embedded Video Engine (EVE) it won’t eat up all of your Arduino just to run them! The FT813 uses
an object-based command set to render the image onscreen, handle touch input, and output audio.
This keeps traffic on the SPI bus to a minimum and allows the host microcontroller to focus on more
interesting tasks.
But wait, there’s more! Hold on to your seat cause the Sunflower shield also includes a K-type
thermocouple amplifier (thermocouple included), an output to control a solid state relay, and a PWM
backlight controller for the LCD. We’re truly curious what kind of monstrosity you will make with all
this capability.
If the object-based graphics engine is intimidating don’t worry! Thankfully a man named James
Bowman wrote a very good Arduino library to support the FT813 chip and then went above and
beyond to create the ultimate manual for his library. He took all the hard work out and left only the
tasty creative jobs up to you, and there are even a host of examples to get started with.
Experimental Product: SparkX products are rapidly produced to bring you the most cutting edge
technology as it becomes available. These products are tested but come with no guarantees. Live
technical support is not available for SparkX products. Head on over to our forum for support or to
ask a question.
We do not plan to regularly produce SparkX products so get them while they’re hot!
FEATURES
Graphics
3.5" 320 x 240 (QVGA) TFT Display with 24 bit color
Multi-domain vertical alignment for better visibility
Bridgetek FT813 graphics controller IC with Embedded Video Engine (EVE)
Integrated capacitive touchscreen
Constant-current PWM LED driver for backlight
Excellent Arduino support w/ Gameduino2 library
Peripherals
Micro SD card slot using SPI
K-type thermocouple using MAX31855 amplifier – range -200 to 700 C, +/- 2 C
Poke-home connection for 8 Ohm 1W speaker
Poke-home connector for solid-state relay control
Arduino Pin Usage (Uno)
SPI (Shareable)
o MOSI (D11) : TFT, SD
o MISO (D12) : TFT, SD, Thermocouple
o SCLK (D13) : TFT, SD< Thermocouple
Other (Reserved)
o D6 : TFT Chip Select
o D5 : TFT Power-down
o D2 : TFT Interrupt
o D10 : SD Chip Select
o D3 : Thermocouple Chip Select
o D4 : Solid State Relay
Power
Vin requires 5V
Dimensions
Bezel size: 77 x 64 mm
Mounting tabs: 68.2 x 72.3 mm, 6.6 mm behind glass top
Must be placed as the last shield on Arduino
https://www.sparkfun.com/products/15091 11‐20‐18
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