by Xukyo | 3 May 2021 | Tutorials
The RC522 RFID module is a smart card reader which, among other things, allows to activate a mechanism when the right card is presented to the reader. In this tutorial, we will see the management of an RC522 RFID module with an ESP32 NodeMCU card. Prerequisite:...
by Xukyo | 23 Apr 2021 | Tutorials
ESP32 NodeMCUs are more and more used to make connected objects thanks to their embedded Wifi and Bluetooth links and their computing power. We will see how to use the Arduino IDE to program a NodeMCU. The way to configure the Arduino IDE is similar between these...
by Xukyo | 19 Apr 2021 | Tutorials
The AC light dimmer is a module that allows to vary the power of an alternating current. It has the same use as a transistor in direct current. It can be used to vary the brightness of a lamp supplied with 220V or to vary the speed of a fan, for example. Material...
by Xukyo | 15 Apr 2021 | Tutorials
The ServoHat is a shield for Raspberry Pi that is based on the PCA9685 controller. The PCA9685 module is a 16 channel controller that allows you to drive 16 PWM outputs via I2C communication. It allows among other things to free inputs and outputs of your...
by Xukyo | 12 Apr 2021 | Tutorials
The objective of this tutorial is to learn how to display a message on its LCD screen using the special I2C module for LCD. To realize this tutorial, we met some difficulties like to display a whole word with only the print() function of the LiquidCrystal library. So...
by Xukyo | 11 Mar 2021 | Tutorials
An interesting application in robotics is pattern recognition. In this tutorial we are going to use the OpenCV library in a Python code that will allow us to detect a cable at its centre. In order to achieve this line tracking we will perform image processing with...
by Xukyo | 11 Mar 2021 | Tutorials
To perform the image processing we will install OpenCV on the Raspberry PI. OpenCV is a free graphics library that makes image processing relatively easy. With OpenCV, it is possible to process images from the Pi Camera V2. Material Raspberry PI avec une distribution...
by Xukyo | 11 Mar 2021 | Tutorials
One of the most interesting elements to add is the Raspberry Pi Camera V2 or PiCam. This component allows you to take photos and videos. It is also possible to perform live image processing, such as line tracking for a robot. Material Raspberry Pi with a Linux...
by Xukyo | 24 Nov 2020 | Tutorials
Every computer is equipped with an internal real time clock that allows it to know the date. Arduino type microcontrollers do not have PSTN. The DS3231 module gives the Arduino the ability to calculate the date, allowing it to control time more precisely. Hardware...
by Xukyo | 24 Nov 2020 | Tutorials
One of the main objectives of robotics is to articulate objects. To do this, it is very common to use electric motors. In the case of flying robots, such as drones, the actuators need a high rotational speed to turn the propellers and allow flight. In this case,...
