tft display graph in stock

Hi, nice article and I would like to be able to apply it to my idea of making a component testing curve tracer. Now it would normally use an analog oscilloscope set in the XY mode but it would be a way to bulky and space-hungry to my liking and that’s why an Arduino style 328P MCU made into a miniature oscilloscope (with a color TFT screen and XY inputs capable of withstanding up to 0.1 to 40Vp-p voltages would be a great candidate but have no idea how to do it since my programming skills are quite limited. Any help would be much appreciated TNX

The UNO R3 2.8 TFT Touch Screen covered most of the ports on the Arduino UNO so I used a Mega for this project. The microphone module required 3v -5v and recommended using the less noisy 3v channel on the Arduino. However, the touch screen covered both 3v and 5v ports. So, instead I used digital output 53 as a power source and connected a 220 ohm resistor between the power source and the microphone module. I used a 220 ohm resistor because I just happened to have one on my breadboard. A potentiometer or a higher ohm resistor might work better. However, if you use different voltage or a different resistor, you may need to adjust the code so that the graph displays properly. Changing the strength of the signal will require the data be massaged otherwise the graph spikes won"t appear at all (too low) or the whole screen will be filled with the graph (too high).

800x480 Graphic TFT Display  intelligent HMI that features a full color resistive or capacitive touchscreen available in serial RS232, TTL, I2C, RS422 and USB protocol.Included features, like the piezo speaker and vibratory motor, provide tactile and audio feedback for a comfortable, confident user interaction. Additionally, the field updatable micro SD card stores font and bitmap files to liberate space and resources for use by the microcontroller, Arduino, or other HMI controller.

5.2. COMPANIES THAT HAVE ADVERTISEMENTS DISPLAYED ON THE WEBSITE WILL STORE AND USE COOKIES IN ACCORDANCE WITH THEIR OWN PRIVACY POLICIES. ADVERTISERS AND THIRD PARTY COMPANIES WILL NOT BE PERMITTED TO ACCESS OR USE COOKIES OWNED BY THE WEBSITE.

Normally we show example of real-time reading things like DHT11 on monochrome LCD displays. We can graph that information. Graphing With Arduino on TFT LCD Color Display Probably a Needed Matter to Many Users. Graphing Can Become Difficult On Display With Less Known Drivers. Previously we have talked around MCUFRIEND TFT LCD Calculator. That one had problem with working codes. There are worse displays which are sold. Worse in the sense – most of the Arduino users need some easy working library which works with most common matters. This guide discuss some of the basic matters for the displays which use Elegoo Libraries (Adafruit Industries) and MCUFRIEND TFT LCD. The logic will be same for all similar displays but some tweaks needed for the others to make graph in proper orientation.

There are 3 main matters in the coding part – setting up graphing, reading value like temperature from DHT11 sensor, draw the graph. Unfortunately for practical purpose, you need to use board like Arduino Mega. Connecting DH11 with Arduino UNO is difficult as it occupies the whole board covering all pins. We are not always using the card reader but essentially it is difficult use the unused pins on Arduino UNO with such shield display.

Basically I purchased one Elegoo 2.8′ TFT LCD and was searching for graphing for some other reason. You can directly open this link to use in Arduino Web Editor. To use the same code on other boards, you need to modify some parts like :

In next article, we will see how we can graph values read by LDR on MCUFRIEND display. That is hopefully will be simple. Although with my model of MCUFRIEND TFT LCD, it not going to be easy to make it properly oriented.