tft lcd screen fritzing for sale

Add some jazz & pizazz to your project with a color capactive touchscreen LCD. This TFT display is big (2.8" diagonal) bright (4 white-LED backlight) and colorful! 240x320 pixels with individual RGB pixel control, this has way more resolution than a black and white 128x64 display. As a bonus, this display has a capacitive single-touch touchscreen attached to it already, so you can detect finger presses anywhere on the screen. (We also have a resistive touchscreen version of this display breakout)

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 and 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, 2 I2C pins are required for the touch screen controller.

Of course, we wouldn"t just leave you with a datasheet and a "good luck!". 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, its separate from the 8-bit library since both versions are heavily optimized. We also have an interfacing library for the capacitive touch screen

In our last episode, we continued learning about Fritzing — a novice-friendly electronics hardware design package that we are using to design a real time clock (RTC) shield for an Arduino. We saw how to use Fritzing to take the breadboard design from Part 1 and turn it into a schematic drawing that is crucial for understanding and documenting a design. We also saw how to take that schematic and create a printed circuit board (PCB) design that we sent off to BatchPCB. Well, after three weeks the PCB arrived and it works! Let’s take a look at it and then go a bit further with Fritzing to start learning how to make parts.

Figures 1, 2, and 3 show the Fritzing breadboard, the schematic, and the PCB views, respectively, that were used to generate the Gerber files that I sent to BatchPCB. I purchased one PCB for $26.27 and received it three weeks later (really not bad at all). Plus, they sent me an extra board for free — a two for one hidden sale that you might (or might not) get!

The RTC part of the design is fairly small and tucked away in the bottom left corner to be near the Arduino pins needed to provide power and the I2C connections required by the DS1307 chip. That seems to leave a lot of wasted board space, and indeed when I designed (not using Fritzing) a nearly identical circuit, I made the board much smaller. Remember, though, that the purpose of all this is to introduce Fritzing and how to use it to design an Arduino shield. To be a compliant shield, you need the PCB to fit on an Arduino — thus, the rows of holes on the top and bottom to fit over the Arduino connectors.

Fritzing is a too-cool tool. We’ve had a decent introductory ‘quick start.’ Let’s drill deeper and see what else we can do. Please note that Fritzing is evolving and works on several platforms, so your version may not be exactly what is shown here, but it should be close enough that you can figure out the (hopefully) slight differences.

In this view, we see the Parts and Inspector views on the right of the Fritzing window. These items are docked to the right, but can be dragged out and undocked as shown in Figure 10.

The Preferences dialog (Figures 13 and 14) has four tabs for setting preferences for Fritzing: General, Breadboard View, Schematic View, and PCB View.

Many of the core parts in Fritzing are generic and are quite easy to modify or create new parts with. We"ll look at how to turn the generic IC into a 74HC595 serial-to-parallel shift register. This part is available in the Fritzing core, but we"ll build this part as an exercise to get better acquainted with Fritzing"s features. Drag and drop a generic IC from the Core bin of the Parts dialog box onto the Breadboard View, then undock the Inspector dialog and set it next to the part as shown in Figure 21.

Fritzing has a mystery part that is somewhat similar to the generic IC. We will use it to create a new part that represents the bottom row of an Arduino shield so that we can repeat the RTC circuit design, but for a much smaller PCB (the RTC doesn’t need the top row of the Arduino, so why include it?). So, let’s use these parts to redo the RTC PCB from our last episode. Open that file and save a copy — just in case.

I chose Inkscape — an open source SVG graphics editor — to modify this part in the .svg format used by Fritzing because it is not just free, but a darn good program. I also have the expensive Adobe Illustrator program that draws .svg parts, but I find it less easy to use than Inkscape, so why bother?

We will only use Inkscape superficially to modify a part, but next time we will use it to create a part from scratch. So, if you think you’re going to really get into making parts with Fritzing, I suggest you take some time to learn Inkscape. The effort will come in really handy in the next Workshop.

You can find this part’s drawing in the Fritzing directory under \parts\svg\core\breadboard\7-segment_13.svg. Before messing with it, make a copy and paste it in the directory so you can restore it if you flub something up. Drag the part into Inkscape. Make sure you set Inkscape up as before with the 0.1” spacing and the page resized to fit the part.

Finally — and this is critical — before saving this part, resize the page to fit the part and then — even more critical — save the part as a plain .svg, not an Inkscape .svg (I forget this nearly every time). When you open the 13 mm seven-segment LED in Fritzing, you will see (as shown in Figure 37) that you are now getting an A. Good for you!

Our next Workshop will go a bit deeper into making parts with Fritzing. Some of this will be easy, some hard, and some darn near impossible — but hopefully my hints will help keep you from bloodying yourself on some of the same walls I smacked into. NV

Sometimes it is handy to have a small screen in your Arduino project. The 0.96 inch IPS color diplay is perfect for this. You can get the original Adafruit Color TFT display with SD card readerfor this for $20 (excluding shipping costs), but you can also find a clone on Chinese reseller websites or eBay. Mine did not include a SD card reader, but it was $3 (including shipping).

To make your project better to understand, you can also add board diagrams. This can be done using Fritzing. Just download the version supported by your OS. I have used the Windows 64-bit version and just needed to unzip it and start Fritzing.exe.

In my case I also needed a part that was not in the Fritzing database. Luckily there is a community that submits parts. It is located on the forum page.  Adafruit also has parts on their Github page. To import the part just click the icon in the Parts frame and select Import...

I was now able to create the breadboard diagram. Below you see the breadboard diagram created with Fritzing app of how to connect the display to Arduino Nano.

The display part is Adafruit based, but I have created a table on how to translate the Original Adafruit 0.96" 160x80 Color TFT Display to Chinese Clone IPS 0.96 inch 7P SPI ST7735 module

Adafruit_ST7735 is the library we need to pair with the graphics library for hardware specific functions of the ST7735 TFT Display/SD-Card controller.

Basically, besides the obvious backlight, we tell the controller first what we are talking to with the CS pins. CS(TFT) selects data to be for the Display, and CS(SD) to set data for the SD-Card. Data is written to the selected device through SDA (display) or MOSI (SD-Card). Data is read from the SD-Card through MISO.

You can name your BMP file “parrot.bmp” or modify the Sketch to have the proper filename (in “spitftbitmap” line 70, and in “soft_spitftbitmap” line 74).

#define SD_CS 4 // Chip select line for SD card#define TFT_CS 10 // Chip select line for TFT display#define TFT_DC 9 // Data/command line for TFT#define TFT_RST 8 // Reset line for TFT (or connect to +5V)

#define SD_CS 4 // Chip select line for SD card#define TFT_CS 10 // Chip select line for TFT display#define TFT_DC 9 // Data/command line for TFT#define TFT_RST 8 // Reset line for TFT (or connect to +5V)

However, if your application needs your screen sideways, then you’d want to rotate the screen 90 degrees, effectively changing the display from a 128×160 pixel (WxH) screen to a 160×128 pixel display. Valid values are: 0 (0 degrees), 1 (90 degrees), 2 (180 degrees) and 3 (270 degrees).

tft.print("Lorem ipsum dolor sit amet, consectetur adipiscing elit. Curabitur adipiscing ante sed nibh tincidunt feugiat. Maecenas enim massa, fringilla sed malesuada et, malesuada sit amet turpis. Sed porttitor neque ut ante pretium vitae malesuada nunc bibendum. Nullam aliquet ultrices massa eu hendrerit. Ut sed nisi lorem. In vestibulum purus a tortor imperdiet posuere. ");

In this Arduino touch screen tutorial we will learn how to use TFT LCD Touch Screen with Arduino. You can watch the following video or read the written tutorial below.

For this tutorial I composed three examples. The first example is distance measurement using ultrasonic sensor. The output from the sensor, or the distance is printed on the screen and using the touch screen we can select the units, either centimeters or inches.

The third example is a game. Actually it’s a replica of the popular Flappy Bird game for smartphones. We can play the game using the push button or even using the touch screen itself.

As an example I am using a 3.2” TFT Touch Screen in a combination with a TFT LCD Arduino Mega Shield. We need a shield because the TFT Touch screen works at 3.3V and the Arduino Mega outputs are 5 V. For the first example I have the HC-SR04 ultrasonic sensor, then for the second example an RGB LED with three resistors and a push button for the game example. Also I had to make a custom made pin header like this, by soldering pin headers and bend on of them so I could insert them in between the Arduino Board and the TFT Shield.

Here’s the circuit schematic. We will use the GND pin, the digital pins from 8 to 13, as well as the pin number 14. As the 5V pins are already used by the TFT Screen I will use the pin number 13 as VCC, by setting it right away high in the setup section of code.

I will use the UTFT and URTouch libraries made by Henning Karlsen. Here I would like to say thanks to him for the incredible work he has done. The libraries enable really easy use of the TFT Screens, and they work with many different TFT screens sizes, shields and controllers. You can download these libraries from his website, RinkyDinkElectronics.com and also find a lot of demo examples and detailed documentation of how to use them.

After we include the libraries we need to create UTFT and URTouch objects. The parameters of these objects depends on the model of the TFT Screen and Shield and these details can be also found in the documentation of the libraries.

Next we need to define the fonts that are coming with the libraries and also define some variables needed for the program. In the setup section we need to initiate the screen and the touch, define the pin modes for the connected sensor, the led and the button, and initially call the drawHomeSreen() custom function, which will draw the home screen of the program.

So now I will explain how we can make the home screen of the program. With the setBackColor() function we need to set the background color of the text, black one in our case. Then we need to set the color to white, set the big font and using the print() function, we will print the string “Arduino TFT Tutorial” at the center of the screen and 10 pixels  down the Y – Axis of the screen. Next we will set the color to red and draw the red line below the text. After that we need to set the color back to white, and print the two other strings, “by HowToMechatronics.com” using the small font and “Select Example” using the big font.

Now we need to make the buttons functional so that when we press them they would send us to the appropriate example. In the setup section we set the character ‘0’ to the currentPage variable, which will indicate that we are at the home screen. So if that’s true, and if we press on the screen this if statement would become true and using these lines here we will get the X and Y coordinates where the screen has been pressed. If that’s the area that covers the first button we will call the drawDistanceSensor() custom function which will activate the distance sensor example. Also we will set the character ‘1’ to the variable currentPage which will indicate that we are at the first example. The drawFrame() custom function is used for highlighting the button when it’s pressed. The same procedure goes for the two other buttons.

So the drawDistanceSensor() custom function needs to be called only once when the button is pressed in order to draw all the graphics of this example in similar way as we described for the home screen. However, the getDistance() custom function needs to be called repeatedly in order to print the latest results of the distance measured by the sensor.

Ok next is the RGB LED Control example. If we press the second button, the drawLedControl() custom function will be called only once for drawing the graphic of that example and the setLedColor() custom function will be repeatedly called. In this function we use the touch screen to set the values of the 3 sliders from 0 to 255. With the if statements we confine the area of each slider and get the X value of the slider. So the values of the X coordinate of each slider are from 38 to 310 pixels and we need to map these values into values from 0 to 255 which will be used as a PWM signal for lighting up the LED. If you need more details how the RGB LED works you can check my particular tutorialfor that. The rest of the code in this custom function is for drawing the sliders. Back in the loop section we only have the back button which also turns off the LED when pressed.

So I’ll start off by saying, if you like to tinker and work out how things work (like I do), read on, but if you want a display to plug-in and “just work” then it is really well-worth paying a bit more and pick up a well supported screen from the likes of Adafruit or Raspberry Pi or Pimoroni or similar.

If you’re still planning on “going it alone” then I suggest having a proper thorough look through the “lcdwiki” to see if the board you’re looking at is there – http://www.lcdwiki.com/Main_Page.  This might make things a lot easier!

MCUFriend TFT library for range of MCUFriend displays which includes support for some ILI9488 based modules: https://github.com/prenticedavid/MCUFRIEND_kbv/blob/master/MCUFRIEND_kbv.cpp

The “TL;DR” version is that to use the display with the widest range of microcontrollers, I’d recommend taking a look at the Arduino_GFX library by “Moon on our Nation” and read the LCD Wiki for more specific details.

This post details my experiments getting the display and touchscreen to work with the Arduino Uno.  Further posts might look at other options in the future.

I’ve used two devices as there are five signals that need level shifting: MOSI, CLK, CS, DC, RESET.  MISO does not need to be level shifted as this is the “LCD to microcontroller” line, so that is being driven at 3.3V but going into a 5V microcontroller line which is fine.

“the typical Adafruit TFT libraries are designed to work with 16bit color (RGB565), and the ILI9488 can only do 24bit (RGB888) color in 4 wire SPI mode.”

I want to try to get the touchscreen working, so my initial attempt was to add wiring into the touchscreen interface via the level shifters on a breadboard.  But it was proving so unreliable in terms of connections, that eventually I gave up and decided to make a DIY “shield” to support the module.

Note: This needed updating to support the touchscreen and display at the same time, for reasons I’ll go into later, but for now, just note that the circuit below isn’t the final version if you want touchscreen support, although it is fine for just the display.

I’ve included the connections for the touchscreen, which largely consist of adding it to the SPI bus and adding two IO pins for the Select and IRQ lines.  I’ve used slightly different IO pins for some of the TFT connections too to make the wiring slightly simpler. The updated wiring for the display is as follows:

My first iteration had both of the new touchscreen pins going through the level shifter, then I realised (doh) that the IRQ will be an INPUT pin, so actually can be connected straight to the Arduino… Also, that the Arduino only has two external interrupt pins on D2 and D3, so T_IRQ has to be one of those (I’d originally wired it to D6)!

Here are some photos of the build process for reference.  I’ve tried to stick to the same colours as the Fritzing diagram (although my “ochre” looks very like my “orange” in places!).

The MISO link does not need to go via the level shifters in the same way.  The initial build of the shield has them linked directly as shown below.  This was the cyan link in the diagram, but I’ve used pink wire here. It turns out that the display and touchscreen don’t play nicely together on the SPI bus, so I ended up having to do something different with MISO for the display, but more on that later.

The blue wires complete the links between the level shifters and the TFT header.  Once again, you can see the extra wire to T_IRQ which I remove later! I opted to take one of these underneath, the CLK signal seemed to make more sense that what as shown below.

Once I was confident everything seemed ok, it was a case of plugging in the two HC74125 chips (observing the correct orientation of course) and trying it with an Arduino and the screen.  One thing to consider – that screen is quite large to be supported just by a single set of headers on one side, so I used mounting holes in the shield PCB to add some 10mm M3 stand-offs.  There were two minor issues with this:

Now I have a reliable way to actually talk to the display module, I can get on with trying to drive the touchscreen.  If you want to follow along with a solderless breadboard (not recommended – it caused me no end of grief as there are just so many connections) here is an updated Fritzing diagram.

After enabling the touchscreen, I was finding that no-matter what I did I couldn’t get the touchscreen controller to give me a reading.  The touchscreen controller is a XPT2046 and there is a library from Paul Stoffregen (designer and developer of the Teensy Microcontroller), so that is what I was using.  It uses hardware SPI and just needs to be told the IRQ pin (optional) and “chip select” (CS) pin to be used for the touch controller.  You can find it here: https://github.com/PaulStoffregen/XPT2046_Touchscreen

But I couldn’t get anything to work.  Eventually I jumpered out the display from my shield and disconnected the SPI links to the display leaving just the touchscreen.  It turns out that the problems I was seeing are quite common with cheap, poorly implemented devices.  Paul Stoffregen once again provides the complete details of the issue in this article.  There are two common problems, which both manifest themselves if you attempt to use more than one SPI device on the SPI bus:

With MISO from the display unconnected, the touch screen worked. With both display and touch screen on the SPI bus, it doesn’t, although the display keeps working fine.  The solution is to build in a “tri-state buffer” to the MISO line for the problematic device and only have it enabled when that device’s “chip select” is active.

Alternatively, although I didn’t need to do this, you might want to consider using the remaining buffer for the touchscreen MISO pin too, so that both MISO connections go through enabling buffers.  I didn’t seem to need this with mine, but see how you go.  Maybe the XPT2046 does SPI better than the ILI9488.

Here is my test code to drive the display and respond to touch, with debug information over the serial port.  It includes two functions at the end that convert touch coordinates (0 to 4095) into display coordinates to match the screen resolution.  This is all relative to the current rotation providing that w and h are set appropriately i.e. obtained from the GFX library once setRotation() has been called.

Note that the touch screen library and the GFX library have the same understanding of rotation, which is really handy, but I suspect that is because both are designed to work with or are based on the original Adafruit GFX library.

The cute PiTFT got even more adorable with this little primary display for Raspberry Pi in HAT form! It features a 2.2" display with 320x240 16-bit color pixels. The HAT uses the high speed SPI interface on the Pi and can use the mini display as a console, X window port, displaying images or video etc. Best of all it plugs right in on top of your Model A+ or B+ and fits into Adafruit"s case quite nicely.

Ich habe ein neues Bautei mit dem Bauteile- Editor bei Inkscape erstellt. Ich habe Textfelder benutzt um die Pins des neuen Bauteils zu beschriften. Hierbei habe ich die Schriftart Droid Sans benutzt, wie es empfohlen wird. Diese habe ich sogar auf der Fritzing-Website heruntergeladen. Nach dem Gestalten des Bauteils bei Inkscape habe ich es bei Fritzing hochgeladen. Dann kommt die Meldung:

“Fritzing unterstützt derzeit nur OCRA und Droid- Schriftarten–diese haben die Schriftarten in ‘C:/Users/lonsk/OneDrive/Desktop/Soundinstallation Skulpturenpark/YX5300-MP3- Player normales svg.svg’ ersetzt.”

Die svg- Datei wird zwar dann bei Fritzing hochgeladen (per Bild als Ansicht laden) aber die Größe und Position des Schriftfeldes stimmen nicht mehr. Das nervt extrem, das Programm ist so für mich unbrauchbar und ich sehne mich nach meinen alten Bleistift- Schaltplänen:D Ich will aber nicht aufgeben, weil das Erstellen der Schaltpläne mit Fritzing viele Vorteile bereit hält, denke ich.

Gibt es irgendwo eine Datenbank, in der man weitere Bauteile für Fritzing herunterladen kann, oder eine Datenbank mit Bildern als Ansichten von Bauteilen, die mit Inkscape erstellt wurden? Ich würde mich sehr über einen Link freuen, ich habe bisher noch nichts gefunden.