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 | 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 | 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,...
by Xukyo | 14 Oct 2020 | Tutorials
In programming, it is very common or even necessary to use functions that require special definition. This is especially true when code blocks are repeated in the same program. A set of functions and objects are usually collected in libraries. We will see in this...
by Xukyo | 14 Oct 2020 | Tutorials
When you start programming with Arduino, you will very quickly get to the use of strings. A string is used to store text. It is used, for example, to display text on an LCD screen or to send text to the serial monitor. This is often the first example: the display of...
