A wheel hub motor is a motor that is installed directly in a wheel of a vehicle and at the same time carries the wheel hub. Most designs are electric wheel hub motors, but there were also internal combustion engines. In the case of electric wheel hub motors, both internal and external rotors are conceivable. In principle, the hub dynamo is similar to the wheel hub motor, an exclusively … [Read more...]
How Digital Photo Frame Works and What Are DIY Solutions
A digital frame (or digital photo frame) is an electronic device that reproduces the appearance of a frame, to display one or more photos from a digital source without the aid of a microcomputer. They usually rely on LCD, TFT, QLED and e-ink technology for display. The surface, matt or glossy finish, with a diagonal of 7 inches to 85 inches is in 4/3 format (the definition of the panel can … [Read more...]
ESP32 Control Servo Motor Over WiFi (Basic of Robot Car)
Many hobbyists try to directly use some projects on how to build a robot car available on the internet and eventually face issues. There are various reasons why the project fails because there are differences in setup and components. A common approach to steer a robotic car to the right or left is by using a shield which uses four DC motors. The method is good for toys but not enough mature or … [Read more...]
Updated Ping Sites For WordPress Blogs in 2023
In blogging, a ping is an XML remote procedure call (a form of a message) by which a blog informs one or more servers that its content has been published or modified. Ping was first used by Dave Winer on weblogs.com in 2001 and that standard is used still today. Open ping servers allow all kind of web services to subscribe to the list of blogs that have recently pinged them. Search engines can … [Read more...]
What is the Difference Between Ubuntu and Debian on Server?
Debian is a collaboratively developed free operating system. Debian GNU/Linux is based on the basic system tools of the GNU Project as well as the Linux kernel. Debian offers a wide range of application programs and tools. Debian was founded in August 1993. Today, the project has over 1000 official developers. It is one of the oldest, most influential, and most widely used GNU/Linux distributions. … [Read more...]
How Analog-to-Digital Converter (ADC) Works
An analogue-to-digital converter (ADC) is an electronic device whose function is to translate an analogue quantity into a digital value encoded on several bits. The converted signal is usually an electrical voltage. As we have explained before, the GPIO pins of any microcontroller board such as Arduino, ESP32 etc can handle digital input or output only. The analogue pins of Arduino are an … [Read more...]
How to Save Sensor Data from ESP32/Arduino to InfluxDB
There are some databases which are suitable for use with Arduino, ESP32 etc microcontrollers. We can indeed use MySQL (and PHP) to create IoT projects like this one. However that approach requires own API server and such method has limitations. It is a complicated method and presents app and web development moving away from PHP and MySQL/MariaDB. These days it is convenient to use Create React App … [Read more...]
WordPress Optimisation: Maximising Speed and Performance
Ensuring that your WordPress website runs both swiftly and smoothly is not just a preference—it's a necessity. In the current digital age, a lightning-fast user experience forms the cornerstone of online business, playing a pivotal role in maintaining visitors' engagement and ensuring their return. Moreover, website performance isn't just about end-users; it is also integral to the digital … [Read more...]
What We Have Learned From Titan Submarine Incident
The 2023 accident of the submersible Titan occurred during a dive into the international waters of the North Atlantic Ocean off Newfoundland, Canada. The Titan is a small submersible for tourism purposes, operated by OceanGate and intended particularly to ensure paid visits to the wreck of the Titanic. On June 18, 2023, it began a descent towards the wreckage during which it suffered an implosion … [Read more...]
List of GPL Compatible Fonts (100% Safe to Commercially Use)
When we are talking about Apache server or MariaDB or WordPress, we do not have any fear of getting prosecuted. We can develop products without paying any fees, virtually without reading their licensing terms, and we can claim ourselves as "experts" after developing a significant amount of skill. Even we charge our clients for downloading and installing the products. Adding a GNU GPL license … [Read more...]
Troubleshoot Not enabling PHP x.y FPM by default Notice on Ubuntu Server
If you are receiving the notice "Not enabling PHP x.y FPM by default" (with Apache webserver) after upgrading your Ubuntu server then you need to spend time behind the server and remain attentive during reboot. After I received this notice, I Google searched and read at least 50 web pages to understand where the error is arriving. The main information I got from Linode's community: … [Read more...]