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The article explores the application of digital circuits, such as logic gates, logic functions, flip-flop, and automata, using the Nexys 4 DDR platform from Xilinx and the Vivado software. The Nexys 4 DDR, featuring the Artix-7 FPGA, provides a robust environment for designing and testing digital systems. It allows for efficient implementation of various digital functions through hardware programming and simulation. The use of Vivado software eases the creation, simulation, and deployment of custom digital circuits, highlighting the versatility and power of FPGA technology in real-world applications. This paper highlights key principles, practical implementations, and design considerations involved in using these tools for digital circuit applications.

The paper aims to present the usefulness of Field Programmable Gate Array - based systems, the elasticity of hardware design for reuse, and the use of hardware and software resources. The proposed measurement system is a starting point for the design of a weather station capable of interpreting the variation of the size of atmospheric pressure, temperature, and humidity, which could make local weather predictions.

In this paper it is proposed to offer solutions using the BeagleBone Black FPGA development board, together with a series of electronic devices: LEDs, ultrasonic sensors, proximity sensors. The applications were developed using various existing programming languages such as: JavaScript, Python, Ruby but also using various commands specific to the Linux operating system. Also, the entire work was implemented using an online programmable cloud environment, called Cloud9 IDE that allows accessing and modifying applications developed at will from any location with an active internet connection.

Intelligent Transport System (ITS) is a worldwide movement meant to use advanced technology to make the ground transport systems more efficient, clogging-free, more secure and less polluting. The present technologies permit the development of applications for traffic monitoring in a semaphored crossroads. The solution proposed is a low-cost one, using FPGA DE0 development platform. The implementation and simulation of the application have been realized in Quartus II 13.1 and the diagrams corresponding to the outputs and inputs have been obtained using ModelSim- Altera 10.1d.

If the electrons and holes in excess are created in a semiconductor, either by means of light absorption, or using other methods, the thermic balance is disturbed, therefore these electrons and holes should be nullified after the source had been stopped. This process is named recombination. There are three main recombination types: radioactive, Auger and deep energy level recombination. All three are based on the doping concentration to a certain point. The life time is determined using the three recombination processes in semiconductor.

The project aims at creating a monitoring and control circuit in a desktop or complex system with the possibility to set the operating parameters. The project allows automatic and manual control of a certain number of fans using Pulse Width Modulation (PWM) control by the user or automatically by the system monitoring thresholds of minimum and average temperatures (also set by the user within the code). The system was designed with the following options: audible and visual alert when reaching maximum temperatures; time display, PWM percentage and three temperatures shown on a 16x2 LCD; the system-acquired data is then transmitted to a website. Additional features include the possibility of setting a color inside the system, also used as an alert as well as a color adjustment function by sound (for a musical lightshow). The mode of operation is based on the source code written in the Arduino IDE 1.6.3 software with the help of free libraries and free codes provided on the internet.

The article describes a sun-tracking system based on Arduino Nano, designed to optimize the output of a solar panel. It incorporates an INA219 sensor for current monitoring, two servo motors for dual-axis orientation, and four photoresistors for light detection. The system automatically adjusts the panel’s position, maximizing solar energy capture and enhancing energy efficiency.

In GaAs-type materials, the primary mechanism for intra-valley scattering of low-energy electrons is their interaction with acoustic photons. These collisions are of the elastic and isotropic type, with their main effect being the nearly uniform scattering of the velocity vector of the electrons. Since the drift current in heterojunction bipolar transistors is proportional to the electric field, the contribution of the majority drift current cannot be neglected, as even a very small internal field produces a significant current when the number of carriers is very high. At the metallurgical heterojunction (x = 0), the total current is equal to the sum of the two thermionic emission components. The paper analyses the variation of the direct current of the Al0.3Ga0.7As/GaAs heterojunction, used as an emitter-base NP junction in heterojunction bipolar transistors, using the Python program.

The assembly formed by a pn semiconductor homojunction together with the metal contacts necessary to connect the junction to the external circuit is a diode. The article aims to analysed and determine the internal parameters of a pn homojunction using the Octave software.

The work presented introduces a system that encompasses general notions about the dashboard computer and Arduino platform, used to create an automotive diagnostic tool through the OBDII port. This involves establishing a connection between the Arduino platform, a Bluetooth module, and a Bluetooth adapter that communicates with the Engine Control Unit (ECU), transmitting information displayed on an LCD screen. To highlight the system’s performance, a comparison of results was conducted with an authorized automotive tester from an auto service, using two different vehicle models.