Original Gravity: Analog Rotation Potentiometer Sensor for Arduino – Rotation 4707?? – PartsCountry

Description

Add some jazz & pizazz to your project with a colour touchscreen LCD. This TFT display is big (3.5″ diagonal) bright (6 white-LED backlights) and colourful! 480 x 320 pixels with individual RGB pixel control, this has way more resolution than a black and white 128 x 64 display, and double our 2.8″ TFT. As a bonus, this display has a resistive touchscreen attached to it already, so you can detect finger presses anywhere on the screen.

This display has a controller built into it with RAM buffering so that almost no work is done by the microcontroller. The display can be used in two modes: 8-bit or SPI. For 8-bit mode, you’ll need 8 digital data lines and 4 or 5 digital control lines to read and write to the display (12 lines total). SPI mode requires only 5 pins total (SPI data in, data out, clock, select, and d/c) but is slower than 8-bit mode. In addition, 4 pins are required for the touch screen (2 digital, 2 analogue)

Of course, we wouldn’t just leave you with a datasheet and a “good luck!”. Check out our detailed tutorial for wiring, testing and example code! For 8-bit interface fans, we’ve written a full open-source graphics library that can draw pixels, lines, rectangles, circles, text, and more. For SPI users, we have a library as well, it’s separate from the 8-bit library since both versions are heavily optimized. We also have a touch screen library that detects x, y and z (pressure) and example code to demonstrate all of it.

Revision History

• As of February 10th, 2025?- We’ve?updated the backlight driver as the previous chip was discontinued.
• As of December 27, 2022??C?we’ve updated this PCB to use TSSOP instead of SOIC versions of the 74-series level shifters, and to use a TPS61040-based backlight driver instead of FAN5331. We’ve also used?Adafruit Pinguin?to make a lovely and legible silkscreen. You may get the new PCB or the older version – both are identical other than the component swaps & fancy silkscreen.

Specifications

• PCB may come in blue or Adafruit black
• 3.5″ diagonal LCD TFT display
• 320 x 480 resolution, 18-bit (262,000) colour capable – our code uses only 16-bits since it’s faster.
• 8-bit digital interface, plus 4 or 5 control lines (12 pins minimum) or SPI mode with 4 or 5 SPI data/control lines (4 pins minimum) – not including the touch screen.
• 5V compatible! Use with 3.3V or 5V logic such as an Arduino
• 3.3V @ 150mA LDO regulator
• 6 white LED backlights with DC/DC constant-current boost. You can PWM dim the backlight
• 1 x 20 headers for easy breadboarding
• 4-wire resistive touchscreen
• Screen: 56mm x 85mm x 4mm
• PCB: 56mm x 97mm x 2mm
• Weight: 52g

Resources

• Tutorial and Downloads