In the realm of embedded systems, the 8051 microcontroller stands as a cornerstone, revered for its versatility, efficiency, and enduring relevance. Developed by Intel in 1980, the 8051 has since become one of the most widely used microcontrollers in the world, finding applications in diverse fields ranging from consumer electronics to industrial automation. This article aims to provide a detailed … [Read more...]
Hardware
Detailed article on computer hardware parts like RAM, Motherboard, Processor, Graphics card. Hardware also covers topics on hardware of Server, Single Board Computers like Raspberry Pi to Libre Hardware Projects.
How Do POS Terminals Work
A POS terminal (Point of Sale terminal) is an online terminal for cashless payment at a point of sale. It checks a debit card or credit card for blocking and reports the test result to the point of sale. A mobile device is called a "mobile point of sale" (mPOS). When the triumph of ATMs became apparent, banks came up with the idea of replacing three cash handling processes with a single, … [Read more...]
IoT Based Laser Water Tank Level Monitor with ESP32, VL53L0X, PHP & MySQL
To create an IoT-based water tank level measurement system with ESP32 Arduino, VL53L0X ToF sensor, PHP MySQL backend, and a web interface for visualization and real-time updates, we'll need to divide the project into two parts: the Arduino sketch for data collection and the web interface for visualization and alerts. This article is slightly complex and it requires a basic knowledge to handle a … [Read more...]
How to Blink an LED Only Twice After a Button Press Using Arduino
Blinking an LED is one of the most basic projects for Arduino beginners. Previously, we have demonstrated how to Blink LED and Beep Every X Seconds Upon Push Button Press. However, adding a condition to blink the LED only a certain number of times after a button press introduces a new level of complexity. In this tutorial, we'll explore how to achieve this functionality using an Arduino board, an … [Read more...]
Application of Resonant Circuit
An electrical resonant circuit is a resonant electrical circuit consisting of a coil and a capacitor that can perform electrical oscillations. The electric oscillating circuit is often compared to the harmonic oscillator of mechanics such as the spring pendulum or tuning fork. In this resonant circuit, energy is periodically exchanged between the magnetic field of the coil and the electric field … [Read more...]
Operation of Solar Inverters
Solar inverter refers to a special type of inverter that converts the DC voltage of the solar cells into alternating voltage and is optimized for operation with solar modules. This inverter is part of a photovoltaic system and has the task of feeding the electrical energy generated into the power grid. On the input side to the solar cells, there is usually a DC converter with a maximum power … [Read more...]
Background of Mobile Game Development
Mobile games are video games for mobile phones and smartphones, similar to games for PCs or game consoles. While the early mobile games, such as Snake or Memory, did not yet have color graphics and were transmissions from the early days of the computer, they are becoming increasingly elaborate with the advent of Java-enabled mobile phones, color displays, better computing power and an extended set … [Read more...]
Hazards of Overclocking (Mobile & Desktop Processors)
Overclocking is the operation of processors or other computer components (hardware components) at a higher clock speed above the normal manufacturer's specification, with the aim of increasing computing power. The opposite of this is underclocking, which is usually used as an energy-saving measure or with the aim of a longer service life. Occasionally, features that dynamically increase … [Read more...]
How Door Access Control System Works
Access control controls access via a set of rules defined by the operator "Who – When – Where" so that only authorised persons have access to the areas in buildings or protected areas on a site that have been approved for them. Access authorisations can be limited in time (expiry period, time). Access authorisation can be checked by people, e.g. employees of a security service, or by technical … [Read more...]
What is Inductive Coupling
Inductive coupling is the mutual magnetic influence of two or more spatially adjacent electrical circuits by electromagnetic induction as a result of a change in the magnetic flux. Counter-induction is the basis of some technical devices (such as the transformer), but it can also be a very undesirable effect (such as in the field of electromagnetic compatibility). One parameter that describes this … [Read more...]
Pros and Cons of Qi Charging (Inductive Energy Transfer)
Qi is a proprietary standard of the Wireless Power Consortium (WPC) for wireless energy transmission using electromagnetic induction over short distances. According to WPC, the Qi standard, which was founded in 2008, is supported by over 1000 different devices and counts over 200 companies among its members. The first supplier of smartphones was the South Korean manufacturer Samsung, whose Samsung … [Read more...]