hiletgo 3.2 ips tft lcd display ili9481 fritzing free sample

I’m mostly finished a modification of the adafruit part to convert it to this. I’m done for tonite and busy tomorrow but a part should be along soon (only pcb and the fzp file to finish). I found board dimensions (if not hole nor header placement which are just guesses) on ebay so it won’t be quite correct unless you can measure the placement of the holes and the pins with calipers but it should do the job. The adafruit part looks to be the alternate layout for this same display (only 10 pins instead of 16, different mounting holes and board size).

I don’t think inkscape is quirky, I get along with it quite well considering I am a newbie at it. I think the inkscape to Fritzing interaction needs work and I think most of the problems can be solved on the inkscape side of things.

This is slightly misleading in that copper1 is actually under copper0 not silkscreen, but the order should be silkscreen, copper1 with copper0 as a group under copper1 (at present copper1 and copper0 are reversed.) I don’t know of any problem this causes other than Fritzing will prefer to select silkscreen if it is the lowest group (thus a warning rather than an error.)

While this shows as an error (because in schematic it likely is one), in this case it is ignorable, because Fritzing will use the center of the pin as the termination point as was intended. Technically you can and should remove the connectorxterminal elements in breadboard, but it won’t hurt anything. repeats for all the pins on breadboard.

With that done and no major problems, load the part in to Fritzing and test it. This is to catch errors that the script can not (such as a terminalId existing but being in the wrong place). Here is a sketch of a typical test:

Doing that points out the problem. The diameter of your pads is slightly too small, they are around 0.075in (when they should be 0.078in) and the stroke width is 20.00025558. If I reset the diameter to 0.078 and the stroke-width to 20, the holes will be the correct 0.038in. However changing the diameter via the tool bar will move the center of the pad slightly (causing misalignment) so the trick to do is to change the w and h parameters to 0.078 in the tool bar and then record the radius from the xml editor window (which will be 29.) Now undo the w and h changes to restore the pad to its original position and instead change the radius from its current value to 29. This changes the diameter relative to the center of the circle leaving its x y position the same which is what we need in this case. As a side issue the radius is currently an ellipse not a circle (because of floating point roundoff during the rescaling) and thus has a rx and ry in xml editor. We want to change both to be 29 which will make it a circle with r=29 again. Then change the stroke-width to 20 and you are done. Alternately you can do the scale mathematically like this to calculate a new radius and stroke-width at the current scale (but I find rescaling easier):

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.

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.

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.