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Database server setup: enhancing security and performance

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Setting up a robust database server is a critical step in ensuring the smooth functioning of applications and safeguarding sensitive data. In the realm of cybersecurity and efficient data management, employing good practices can make a significant difference. This article explores the advantages of segregating application and database servers, emphasizing the importance of allowing only authorized connections. Additionally, we'll discuss the use of SSH tunnels to enhance security and weigh the pros and cons of such a system.

Keeping time with DS1302: real-time clock on Arduino

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  • 8 mins read
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In the fascinating world of Arduino and microcontrollers, keeping time is key. You might need to build a digital clock, a timer, or something more complex like an automated plant watering system. That's where the DS1302 module steps in. It's a handy little device that can help you keep time accurately in your Arduino projects. In this article, we'll take a closer look at the DS1302 module, understand how it works, and explore its applications.

Soft Deletes vs Hard Deletes: Making the right choice

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In the world of data management, there are often two contrasting approaches to removing information from a database: soft deletes and hard deletes. Both have their pros and cons, and the choice between them can significantly impact how your data is handled. Let's dive into this crucial decision and help you decide which option is best suited to your needs.

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How to control mini water pump with Arduino

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  • 7 mins read
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The advent of Arduino microcontrollers has revolutionized the world of electronics and automation. With their user-friendly interface and vast array of modules and sensors, Arduino boards have become the go-to choice for hobbyists and professionals alike. In this article, we will explore the significance of a 5V water pump module, the importance of using transistors, and how to effectively connect the two to create an efficient water control system.

Repository cache in Symfony

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In today's data-driven world, efficient data management is paramount for any modern web application. Symfony, a popular PHP framework, provides developers with powerful tools and patterns to streamline data handling. Two key components that play a pivotal role in enhancing data management within Symfony applications are the Repository Pattern and Data Caching. In this article, we'll delve into these concepts, exploring how they work together to boost performance and simplify data access in Symfony projects.

Installing & setting up Symfony 6

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Symfony is a PHP web application framework and a set of reusable PHP components/libraries. Symfony aims to speed up the creation and maintenance of web applications and to replace repetitive coding tasks. It's also aimed at building robust applications in an enterprise context, and aims to give developers full control over the configuration: from the directory structure to the foreign libraries, almost everything can be customized.

Controlling a LED with Arduino

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Light Emitting Diodes (LEDs) are incredibly adaptable components often employed in electronics projects for various purposes, from indicating status to creating captivating lighting effects. When it comes to managing LEDs with an Arduino, you have the option of utilizing either digital pins or Pulse Width Modulation (PWM) pins. In this article, we'll explore the advantages of each method and provide you with a comprehensive guide on how to control LEDs using an Arduino.

Criteria: PHP package for managing Criteria Pattern

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The Criteria Pattern stands as a powerful tool, often hidden in the shadows of more commonly discussed design patterns. This pattern empowers developers to implement dynamic and customizable queries in their applications, enhancing flexibility and maintainability To facilitate this process, Criteria package provides the shared domain logic that contains abstract criteria implementation that each specific criteria should extend from.

The Repository Pattern

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In the ever-evolving world of software development, architects and developers strive to create scalable, maintainable, and robust applications. One of the key principles that aid in achieving these goals is the proper organization of data access and storage. The Repository Pattern is a fundamental architectural design pattern that provides a structured approach to handling data, making it an invaluable tool for developers. In this article, we will delve into what the Repository Pattern is, how it should be implemented, and provide some real-world examples of its application.

Connecting a motor to Arduino

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Arduino microcontrollers are the heart of countless DIY projects, from robots to automated systems. To bring these projects to life, you often need to interface them with motors. In this guide, we'll walk you through the essential steps of connecting a motor to an Arduino using a separate power supply while ensuring control with precision using an NPN transistor. This approach allows you to harness the full potential of your motorized creations without overloading your Arduino.



Playing popular songs with Arduino and a buzzer

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HiBit

Dr. Dre ft Snoop Dogg - Still D.R.E. has been added.

Enjoy!

Playing popular songs with Arduino and a buzzer

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HiBit

It's not possible to make a direct MP3 to buzzer decoder because a buzzer (especially a typical piezo buzzer) can only produce simple tones at specific frequencies, not complex audio like speech or music. MP3 files contain compressed, multi-frequency audio data far beyond what a buzzer can reproduce. At best, you could extract a basic melody or rhythm if the MP3 is extremely simple (like single-tone music), but decoding full MP3 audio into something a buzzer can play accurately isn't feasible.

Playing popular songs with Arduino and a buzzer

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HiBit

Jujutsu Kaisen - Specialz has been added.

Enjoy!

Complementary filter and relative orientation with MPU6050

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HiBit

Thank you, very appreciated!

The issue is likely that the MPU6050 isn't properly initialized after power-up. Make sure the setup() function runs completely each time the device is powered on, and consider adding a small delay before using the sensor.

Playing popular songs with Arduino and a buzzer

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HiBit

Yung Kai - Blue has been added.

Enjoy!

Playing popular songs with Arduino and a buzzer

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HiBit

First day out has been added.

Enjoy!

Playing popular songs with Arduino and a buzzer

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HiBit

Vanilla Ice - Ice ice baby has been added.

Enjoy!

Getting real-time position using MPU9250

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HiBit

We used an existing library for this. You can see how it was implemented in the code snippet above.

It is also accessible in our GitHub repository.

Reading MPU9250 sensors with Arduino

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HiBit

The article Getting Real-Time Position Using MPU9250 explains how to calculate real-time position using sensor data.

Complementary filter and relative orientation with MPU9250

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HiBit

You can learn how we calculate pitch and roll using a complementary filter in this project; the file is available on GitHub.

Playing popular songs with Arduino and a buzzer

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HiBit

Assassin's Creed 2 - Ezio's Family has been added!

Enjoy!

Playing popular songs with Arduino and a buzzer

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HiBit

Livin' on a prayer has been added.

Enjoy!

Playing popular songs with Arduino and a buzzer

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HiBit

Crystal Castles Kerosene has been added.

Enjoy!

How to use the NRF24L01 module with Arduino

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HiBit

The D10 pin has a specific function; it must be set as an output for the Arduino to operate as the master in an SPI communication protocol. In the provided wiring and code, the pin is already functioning as an output.

How to use the NRF24L01 module with Arduino

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HiBit

I suggest verifying the wiring to confirm that all components are correctly connected, followed by re-uploading the code. The examples provided in the post have been tested and are operational. Please consider that there might be a physical problem, such as a damaged or defective module.

Playing popular songs with Arduino and a buzzer

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HiBit

Coldplay - Hymn for the weekend has been added.

Enjoy!

Playing popular songs with Arduino and a buzzer

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HiBit

Was wollen wir trinken has been added.

Enjoy!

Playing popular songs with Arduino and a buzzer

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HiBit

The board has built-in memory. If additional memory is needed, an alternative board can be used.

Playing popular songs with Arduino and a buzzer

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HiBit

The Doom melody requires more memory than others, so make sure your board can handle that amount. If not, you will usually encounter an error during compilation.

As a workaround, you can try removing some of the notes (along with their respective durations) to fit the melody on the board.

Playing popular songs with Arduino and a buzzer

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HiBit

We couldn't find notes for that song that will sound good with a buzzer.


HiBit community member since December 2020