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You say you want to hook up a TFT display to an Arduino? Are you joking?No! For about the price of a familiar 2x16 LCD, you get a high resolution TFT display. For as low as $4 (shipping included!), it's possible to buy a small, sharp TFT screen that can be interfaced with an Arduino. Moreover, it can display not just text, but elaborate graphics. These have been manufactured in the tens of millions for cell phones and other gadgets and devices, and that is the reason they are so cheap now.
This makes it feasible to reuse them to give our electronic projects colorful graphic displays.There are quite a number of small cheap TFT displays available on eBay and elsewhere. But, how is it possible to determine which ones will work with an Arduino? And what then? Here is the procedure:. ID the display. With luck, it will have identifying information printed on it. Otherwise, it may involve matching its appearance with a picture on Google images.
Determine the display's resolution and the driver chip. Find out whether there is an Arduino driver available. Google is your friend here. Henning Karlsen's library works with many displays. Download and install the driver library. On a Linux machine, as root, copy the library archive file to the /usr/share/arduino/libraries directory and untar or unzip it. Figure out how to hook up the hardware, i.e., which display pins are wired to which pins of the Arduino.
Load an example sketch into the Arduino IDE, and then upload it to the attached Arduino board with wired-up TFT display. With luck, you will see text and/or graphics.
With the display functional, you can then hack together a breakout board or plug-in shield. Finally, interface the display to your favorite Arduino project and write a sketch that adds colorful text and graphics to it. We'll begin with a simple one. The ILI9163 display has a resolution of 128 x 128 pixels. With 8 pins in a single row, it works fine with a standard Arduino UNO or with a Mega. The hardware hookup is simple - only 8 connections total! The library put together by a smart fella, by the name of sumotoy, makes it possible to display text in multiple colors and to draw lines.Note that these come in two varieties, red and black.
The red ones may need a bit of tweaking to format the display correctly - see the comments in the README.md file. The TFTILI9163C.h file might need to be edited.These babies are quite cheap. See, on eBay: $3.38, delivered all the way from China!Hardware connections: LCD pin Arduino pin- -1 LED (backlight) Vcc (3.3v)2 SCK (slave clock) D133 SDA (MOSI) D114 A0 (DC) D95 RESET Vcc (3.3v)6 CS (SS) D107 Gnd Gnd8 Vcc Vcc (3.3v)As mentioned, sumotoy created a library to drive this display. Download the library from.
This one is a 1.44' display with a resolution of 128 x 128 pixels, and it uses an driver.It is 5-volt friendly, since there is a 74HC450 IC on the circuit board that functions as a level shifter. These can be obtained for just a few bucks on eBay and elsewhere, - $3.56 delivered from China. It uses Henning Karlsen's, and it does a fine job with text and graphics. Note that due to the memory requirement of UTFT, this display will work with a standard UNO only with extensive tweaking - it would be necessary to delete pretty much all the graphics in the sketch, and just stay with text.The hardware connections: On 11-pin connector -LCD Pin Arduino Pin1 Vcc Vcc (3.3v or 5v)2 Gnd Gnd3 Gnd Gnd or N/C4 N/C5 N/C6 LED Vcc (3.3v or 5v)7 CLK SCK D13 / D52 on Mega or Due8 SDI MOSI D11 / D51 on Mega or Due9 RS D910 RST reset D811 CS SS D10 / D53 on Mega or DueNote that the 8-pin connector is not used.Example sketches for Uno and Mega/Due: Attachments. This baby has a row of 11 pins and a second row of 5 pins parallel to iton the far side of the display. It has 220x176 resolution (hires!) and will accept either 3.3 or 5 volts. It will work hooked up to an Uno, and with a few pin changes, also with a Mega.
The 11-pin row is for activating the display itself, and the 5-pin row for the SD socket on its back.The hardware hookup: LCD Pin Arduino Pin- -1 Vcc Vcc (5v or 3.3v)2 Gnd Gnd3 Gnd Gnd or N/C4 N/C (not connected)5 N/C6 LED (backlight) D37 CLK D13 (SCK)8 SDI D11 (MOSI)9 RS (register select) D910 RST (reset) D811 CS (chip select) D10about this display.Example sketches for Uno and Mega Attachments. This one is a 2.2' (diagonal) display with 176x220 resolution and parallel interface. It has a standard (' Intel 8080') parallel interface, and works in both 8-bit and 16-bit modes. It uses the S6D0164 driver in Henning Karlsen's library, and because of the memory requirements of same, works only with an Arduino Mega or Due.
It has an SD card slot on its backIt's a bit more expensive than the other displays we've discussed, see:The hardware hookup is likewise a bit more complex. The pins are labeled on the back of the display. LCD Arduino Mega/Due-DB08 D22DB09 D23DB10 D24DB11 D25DB12 D26DB13 D27DB14 D28DB15 D29RS (register select) D38WR (read/write) D39CS (chip select) D40RST (reset) D41Note that in 8-bit mode, the lower eight data lines, DB00 - DB07, are not used.about this display.The library.An example sketch: Attachments.
This one is a bit of an oddball. It's a clone of the more common, and it has two rows of pins, set at right angles to one another. To enable the display in 8-bit mode, only the row of pins along the narrow edge is used. The other row is for the SD card socket on the back, and for 16-bit mode. To interface with an Arduino ( Mega or Due), it uses Henning Karlsen's library, and the driver is ILI9325C. Its resolution is 320x240 (hires!) and it incorporates both a touch screen and an SD card slot.Buy it.At $7.50 + $1.19 postage, this is the most expensive of the displays discussed here, because of the high resolution and the touch screen.Hardware connections: The TFT uses the 18-pin connector (J3) along the short side of the display.
Display 1 2 3 4 5 6 7 8 9Gnd Vcc N/C RS RW RD DB10 DB11 DB12Arduino Gnd Vcc D38 D39 Vcc D22 D23 D24 Display 10 11 12 13 14 15 16 17 18DB13 DB14 DB15 DB16 DB17 CS N/C RST N/CArduino D25 D26 D27 D28 D29 D40 D41Notes:. N/C = not connected.
Vcc = 3.3v. In 8-bit mode, only the high-order bits of the parallel data buss are used.The library:Attachments. Having determined that a particular TFT display will work with the Arduino, it's time to think about a more permanent solution - constructing hard-wired and soldered plug-in boards. To make things easier, start with a blank protoshield as a base, and add sockets for the TFT displays to plug into. Each socket row will have a corresponding row next to it, with each individual hole 'twinned' to the adjacent hole in the adjoining row by solder bridges, making them accessible to jumpers to connect to appropriate Arduino pins.
An alternative is hard-wiring the socket pins to the Arduino pins, which is neater but limits the versatility of the board.Note that the sockets are made from 0.1' female header strips.The key to an effective DIY shield is a neat and logical layout. Sketching the prospective shield on quadrille (graph) paper may be helpful. A multitester or continuity tester might be useful for detecting wiring and soldering errors. Fail better.' - Samuel Beckett. Figure out how to interface other TFT displays, such as the Ihhaos LCD-2000 series. Experiment with using the onboard SD card slot to load pictures and fonts onto the LCD display.
Figure out how to enable the touch screen on those displays that have one. Interface working displays with other projects. See Step 8.
Interface TFT LCD displays of the types discussed with a Raspberry Pi and Beaglebone Black. Build complex projects, such as a portable oscilloscope, with a TFT LCD display.These would be nice topics for future Instructables. Thanks for the wealth of knowledge! It is amazing at what is possible with items the average person can easily acquire. I hope to put some of your tips to use this winter as I would like to build sensors and other items for home automation and monitoring.
Being able to have small displays around the house in addition to gathering and controlling things remotely will help the family see room conditions without going to the computer. The idea of a touchscreen control for cheap is mind blowing.Kind Regards,Dean.