arduino tft display clock supplier

In electronics world today, Arduino is an open-source hardware and software company, project and user community that designs and manufactures single-board microcontrollers and microcontroller kits for building digital devices. Arduino board designs use a variety of microprocessors and controllers. The boards are equipped with sets of digital and analog input/output (I/O) pins that may be interfaced to various expansion boards (‘shields’) or breadboards (for prototyping) and other circuits.

The boards feature serial communications interfaces, including Universal Serial Bus (USB) on some models, which are also used for loading programs. The microcontrollers can be programmed using the C and C++ programming languages, using a standard API which is also known as the “Arduino language”. In addition to using traditional compiler toolchains, the Arduino project provides an integrated development environment (IDE) and a command line tool developed in Go. It aims to provide a low-cost and easy way for hobbyist and professionals to create devices that interact with their environment using sensors and actuators. Common examples of such devices intended for beginner hobbyists include simple robots, thermostats and motion detectors.

In order to follow the market tread, Orient Display engineers have developed several Arduino TFT LCD displays and Arduino OLED displays which are favored by hobbyists and professionals.

Although Orient Display provides many standard small size OLED, TN and IPS Arduino TFT displays, custom made solutions are provided with larger size displays or even with capacitive touch panel.

Time is a critical element of our existence that will never get old, and with technology, we can find better and more intuitive ways to measure it. In one of our past tutorials, we looked at how the DS3231 real time clock module can be used with Arduino to display time on a 16×2 LCD display. Today, we will build an upgrade to that project using an Arduino Due, the DS3231 RTC module and a 3.2″colour TFT display in place of the 16×2 LCD display used in the previous project.

At the heart of today’s project is the DS3231 real time clock module which we will use to obtain the current time, date and temperature of the environment. The DS3231 real time clock module is one of the most popular real-time clock chips among makers and DIY enthusiasts. It is a low-cost, highly accurate, I2Cbased real-time clock (RTC) with a temperature-compensated crystal oscillator (TCXO) and crystal integrated into it.  The module integrates a coin cell battery input which helps it retain date and time even when the main power to the device is interrupted. It maintains seconds, minutes, hours, day, date, month, and year information, automatically adjusting the date for months with fewer than 31 days, including corrections for leap year. It can be set to operate either in the 24-hour or 12-hour format with an active-low AM/PM indicator. It has been used in several projects on this website mostly, due to its accuracy, and its low power requirements which help it keep time accurately, for a longer period of time compared to other real-time clocks (RTC) modules.

Another key part/component that we will use in today’s tutorial is the Arduino Due. One of the important things, when designing electronic systems that have displays is ensuring, that there is no flicker or lag when updating information on the screen and one of the best ways to ensure that, is to use a fast enough micro-controller. Putting this into consideration, for this project, we will use the very fast Arduino Due board. The Arduino Due has one of the fastest CPU in the Arduino family. The Due runs on an 84MHz CPU compared to the 16MHz CPU speed of the Arduino UNO, and as such, it is able to update the screen without any visible flickering.

The most important update to the previous project, however, is the 3.2″color LCD display being used. The display gives us the ability to create a better, bigger and colourful user interface for our clock at a cheap price as it costs about 7$ on banggood.

The goal for this project is to build a real-time clock with a user-friendly interface capable of displaying (without lag or flickering) the current time, date, temperature including the minimum and maximum temperature recorded in a particular environment over time.

The 3.2″ TFT, like most other TFT displays, comes as a shield which can be easily mounted on the Arduino Due. This, however, makes it difficult to access the IOs of the Arduino after the display has been mounted, as it tends to cover the front face of the board. To solve this, so that the DS3231 module can be connected, male headers are used (after bending them as shown in the picture below) to connect the RTC module to the Arduino.

To easily write the code for this project, we will use two libraries: the Bodmer TFT HX8537  library for the TFT display and the Sodaq DS3231 library to easily interface with the DS3231 module. Both libraries can be downloaded via the links attached to their names above. The Bodmer library is a version of the UTFT library specially modified for the Arduino Due as this particular display is incompatible with the UTFT library.

Next is the void setup function. We initiate communication with the RTC module and Initialize the display, setting our preferred orientation for the display and print the UI to the display.

With this done, we move to the void loop function. Under this function, we write the code to update all the parameters (after specific intervals) on the display including the min temperature, the max temperature, time and the date.

That’s it for this tutorial guys, there are several useful projects that can be built using this tutorial as a foundation. You could decide to add a buzzer to the project to create an alarm clock or make a to-do list based project, all out of this.

In the last Arduino project I built a simple real time clock using DS1307 RTC and ST7735 TFT display (link is below) and in this project I’m going to show how to build a real time clock with RTC chip temperature monitor using Arduino, DS3231 RTC and the same display (ST7735 TFT).

The ST7735 TFT is a color display which has a resolution of 128×160 pixel and it communicates with the master device using SPI (Serial Peripheral Interface) protocol.

The DS3231 is more accurate than the DS1307 due to its built-in temperature sensor. It also (the DS3231) keeps time running even if the main power source is down (with the help of 3V battery). It also uses I2C interface to communicate with the master device which is in this case the Arduino.

The ST7735S shown in project circuit diagram has 8 pins: (from right to left): RST (reset), CE (chip enable), DC (or D/C: data/command), DIN (data in), CLK (clock), VCC (5V or 3.3V), BL (back light) and Gnd (ground).

Normally the ST7735 display works with 3.3V only, but many boards of this display have a built-in 3.3V regulator (AMS1117 3V3) like the one shown in the circuit diagram. This regulator supplies the display controller with 3.3V from 5V source.

All Arduino UNO board output pins are 5V, connecting a 5V pin directly to the ST7735 display board may damage its controller circuit. To avoid that, I connected each control line of the display to the Arduino board through 1k ohm resistor.

The DS3231 RTC module SDA (serial data) and SCL (serial clock) pins are respectively connected to Arduino A4 and A5 pins (ATmega328P hardware I2C module pins).

The ST7735 TFT display is connected to Arduino hardware SPI module pins (clock and data), the other pins which are: RST (reset), CS (chip select) and DC (data/command) are defined as shown below:

When you are using DS1302, DS1307 or DS3231 RTC in your real time clock project, You may have observed it’s library works on 24 hours format clock. If you are like me who don’t like to see clock in 24 hour format, this tutorial is for you. we will learn how to set 12 hour clock in RTC (Real Time Clock) using DS1302 with TFT Display. It is simple to convert from 24 hour format to 12 hour format clock by using any of DS1302, DS1307 or DS3231 RTC. In short we are subtracting 12 hours from 24 hours. So let’s get started.

Download library for Real Time Clock library from Rinky-Dink Electronics  OR you can download it from here because library may change by the time or it may not work.

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It"s based on an RGB TFT display controlled by an ATtiny814. It uses a crystal-controlled oscillator to keep accurate time, and takes advantage of the routines for reading from a TFT display described in my earlier article Reading from a TFT Display.

This started as a demo program for my TFT Graphics Library with support for reading from the display, but it grew in complexity, so I decided to write it up as a stand-alone project.

Without the ability to read back from the display you would have to redraw the whole display every time the hands move, which will be once a second if the clock has a seconds hand. This would require a fast processor.

This clock avoids the need to do this by using the ability to read from the TFT display to exclusive-OR the colour of each hand onto the image of the clock face. When the hand moves, you can remove it from its last position by drawing it again, which will restore the background to its previous state. This ensures that features under the hands, such as the hour numbers, aren"t wiped out when the hands pass over them.

The clock is designed to work with a 240x240 or 320x240 RGB TFT display available from AliExpress. I"ve also made a lower-resolution version that will work on a 128x128 or 160x128 display; see Lower resolution version. The following displays are suitable:

Unfortunately Adafruit displays aren"t compatible with this application, because they don"t support reading from the display; there"s more information about this in my article Reading from a TFT Display.

The clock uses the ATtiny814 Real-Time Clock to generate an interrupt every second, with the timing controlled by a 32.768kHz crystal. For the crystal I used a low-cost cylindrical clock crystal L - CS), where CL is the load capacitance, and CS is the stray capacitance which is usually estimated to be 2.5pF on a PCB. This gives C=20pF.

This project is a tabletop clock, designed as a production example for our Tangible Interaction class. We made it to demonstrate how to make a housing for an electronic device with tangible controls from a single block of wood. There are a number of mistakes we made along the way, so we’ve been lovingly referring to it as the “what not to do” clock. Below, we’ve detailed what not to do.

The device has an LCD screen that displays an analog clock face, two pushbuttons on the front face, and a recessed rotary encoder with pushbutton on the back face. It’s powered by a 5-12V DC power jack in the back.

The rotary encoder is used to set the time. Push the button once to set hours, twice to set minutes, and three times to set seconds. The appropriate clock hand will change colors when it’s the hand to be set. In any of these modes, turn the encoder to move the clock hand. A fourth push puts the clock back into normal operating mode.

The front pushbuttons control the brightness of the screen and the daylight savings mode. One button switches the hour hand back and forth from normal to daylight savings. The other toggles the display between a bright and a dim mode. The buttons light up when pressed, and fade on release.

The clock runs on an Arduino Nano 33 IoT. We chose this because it is a small form factor, has a built-in realtime clock, and a WiFi/Bluetooth radio that could be used to set the time wirelessly (that option is not currently implemented).

The display is an LCD display from Tinkersphere, the TS-336 TFT LCD display. This was our third choice. We settled on it because it was the best size for our housing, obtainable nearby, reasonably priced, and had an available library with decent documentation for graphics and text.

The first display we looked at before that was the SSD1306 OLED display, an inexpensive display with an I2C interface (and therefore requiring very few pins on the microcontroller). These displays are easy to use, and available from many retailers, but even the larger one was too small for our housing. The other display we considered was the DFR0529, a round TFT LCD display from DFRobot. The display was a good size for our housing, and a round display would have been ideal, but the available library was too slow to update the screen for our tastes, and we didn’t have time to write a new library.

The program is written for the Nano 33 IoT, but it could run on any of the MKR boards, or presumably any Arduino-compatible that uses a SAMD processor with the realtime clock on board.

In programming it, we had to reverse the direction of the encoder from the logical direction, because the user turns the encoder from the back while looking at the front of the clock.

Note: the brightness of the screen can be adjusted through the potentiometer( in the red box of the above diagram). Counterclockwise rotation to brighten the screen.

The graphic display coordinates and the text display coordinates of the 2.2”screen are two different coordinates systems. The origin of the graphic display coordinates begin from the centre point of the screen while that of the later one begins from the top left hand side of the screen.

The following codes are just one part of the API funciotn description. For more information, please refer to ST7687S Library Introduction and Display Library Introduction.

* @The formal parameter size refers to the text size based on the font(6×8). Size is rounded to the integer greater than 0; if size is 1, the pixel points the font occupied will be 6×8. if it is 2, that will be 12×16. The text out of the screen cannot be displayed;

The function of the program: taking the centre point of the 2.2”screen as the starting point(note: the graphic display coordinates and the text display coordinates are two different coordinates, the centre point of the graphic display coordinates is (64, 64) while that of the later one is (0, 0)), display a character string ”fire” with red text background box, white font and the size of the font 2 on the screen. The formal parameter size of the function to set font size tft.setTextSize (uint8_t size) should be greater than 0 and the text out of the screen cannot be displayed.

The function of the program: use the software image2lcd.exe to extract the bitmap of one image and display it on the centre part of the 2.2”screen(note: for the reason of UNO’s internal memory, the following demo cannot be accepted on UNO since the image file is too large, but it can be displayed on ESP32. So you’d better choose small image file if you want to display it on UNO. ) The parameter selection of the software is provided below.

We have used Liquid Crystal Displays in the DroneBot Workshop many times before, but the one we are working with today has a bit of a twist – it’s a circle!  Perfect for creating electronic gauges and special effects.

LCD, or Liquid Crystal Displays, are great choices for many applications. They aren’t that power-hungry, they are available in monochrome or full-color models, and they are available in all shapes and sizes.

Today we will see how to use this display with both an Arduino and an ESP32. We will also use a pair of them to make some rather spooky animated eyeballs!

There are also some additional connections to the display. One of them, DC, sets the display into either Data or Command mode. Another, BL, is a control for the display’s backlight.

The above illustration shows the connections to the display.  The Waveshare display can be used with either 3.3 or 5-volt logic, the power supply voltage should match the logic level (although you CAN use a 5-volt supply with 3.3-volt logic).

Another difference is simply with the labeling on the display. There are two pins, one labeled SDA and the other labeled SCL. At a glance, you would assume that this is an I2C device, but it isn’t, it’s SPI just like the Waveshare device.

This display can be used for the experiments we will be doing with the ESP32, as that is a 3.3-volt logic microcontroller. You would need to use a voltage level converter if you wanted to use one of these with an Arduino Uno.

The Arduino Uno is arguably the most common microcontroller on the planet, certainly for experiments it is. However, it is also quite old and compared to more modern devices its 16-MHz clock is pretty slow.

The Waveshare device comes with a cable for use with the display. Unfortunately, it only has female ends, which would be excellent for a Raspberry Pi (which is also supported) but not too handy for an Arduino Uno. I used short breadboard jumper wires to convert the ends into male ones suitable for the Arduino.

Once you have everything hooked up, you can start coding for the display. There are a few ways to do this, one of them is to grab the sample code thatWaveshare provides on their Wiki.

The Waveshare Wiki does provide some information about the display and a bit of sample code for a few common controllers. It’s a reasonable support page, unfortunately, it is the only support that Waveshare provides(I would have liked to see more examples and a tutorial, but I guess I’m spoiled by Adafruit and Sparkfun LOL).

Open the Arduino folder. Inside you’ll find quite a few folders, one for each display size that Waveshare supports. As I’m using the 1.28-inch model, I selected theLCD_1inch28folder.

Once you do that, you can open your Arduino IDE and then navigate to that folder. Inside the folder, there is a sketch file namedLCD_1inch28.inowhich you will want to open.

When you open the sketch, you’ll be greeted by an error message in your Arduino IDE. The error is that two of the files included in the sketch contain unrecognized characters. The IDE offers the suggestion of fixing these with the “Fix Encoder & Reload” function (in the Tools menu), but that won’t work.

You can see from the code that after loading some libraries we initialize the display, set its backlight level (you can use PWM on the BL pin to set the level), and paint a new image. We then proceed to draw lines and strings onto the display.

After uploading the code, you will see the display show a fake “clock”. It’s a static display, but it does illustrate how you can use this with the Waveshare code.

This library is an extension of the Adafruit GFX library, which itself is one of the most popular display libraries around. Because of this, there isextensive documentation for this libraryavailable from Adafruit.  This makes the library an excellent choice for those who want to write their own applications.

As with the Waveshare sample, this file just prints shapes and text to the display. It is quite an easy sketch to understand, especially with the Adafruit documentation.

The sketch finishes by printing some bizarre text on the display. The text is an excerpt from The Hitchhiker’s Guide to the Galaxy by Douglas Adams, and it’s a sample of Vogon poetry, which is considered to be the third-worst in the Galaxy!

Here is the hookup for the ESP32 and the GC9A01 display.  As with most ESP32 hookup diagrams, it is important to use the correct GPIO numbers instead of physical pins. The diagram shows the WROVER, so if you are using a different module you’ll need to consult its documentation to ensure that you hook it up properly.

The TFT_eSPI library is ideal for this, and several other, displays. You can install it through your Arduino IDE Library Manager, just search for “TFT_eSPI”.

There is a lot of demo code included with the library. Some of it is intended for other display sizes, but there are a few that you can use with your circular display.

To test out the display, you can use theColour_Test sketch, found inside the Test and Diagnostic menu item inside the library samples.  While this sketch was not made for this display, it is a good way to confirm that you have everything hooked up and configured properly.

A great demo code sample is theAnimated_dialsketch, which is found inside theSpritesmenu item.  This demonstration code will produce a “dial” indicator on the display, along with some simulated “data” (really just a random number generator).

One of my favorite sketches is the Animated Eyes sketch, which displays a pair of very convincing eyeballs that move. Although it will work on a single display, it is more effective if you use two.

The first thing we need to do is to hook up a second display. To do this, you connect every wire in parallel with the first display, except for the CS (chip select) line.

The Animated Eyes sketch can be found within the sample files for the TFT_eSPI library, under the “generic” folder.  Assuming that you have wired up the second GC9A01 display, you’ll want to use theAnimated_Eyes_2sketch.

The GC9A01 LCD module is a 1.28-inch round display that is useful for instrumentation and other similar projects. Today we will learn how to use this display with an Arduino Uno and an ESP32.