lucidar.me

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• name: description content: Lot's of cool stuff about robotics, computer science, Arduino, linux, sensors, actuators, web development ... | Lulu's blog | Philippe Lucidarme

• http://lucidar.me/en/
• Contact
• Français
• http://lucidar.me/#collaps-0
• Brushless Hall sensor frequency calculator
• Commutation sequence for BLDC motors
• Inside a Maxon EC45 BLDC motor
• MIT Motor GIM4310-36
• How to size a motor?
• Motor sizing for an autonomous mower
• Online motor sizing calculator
• http://lucidar.me/#collaps-1
• Algorithmic
• http://lucidar.me/#collaps-2
• Arduino based accurate distance measurement for Sharp GP2Y0A02YK
• Arduino based accurate distance measurement for sharp GP2Y0A21YK
• Arduino 1.0.5 and Atmel templates for Qt Creator 3.0.1 and Ubuntu 14.04
• Arduino serial echo
• Arduino: serial terminal on TFT display
• OV7670 camera and arduino
• How to install Arduino IDE 2.0 on Ubuntu 20.04
• How to install Arduino IDE on Ubuntu 18.04
• QR code orientation With Arduino Nicla Vision
• Radino RF233 in Arduino IDE
• Un Arduino or une Arduino ?
• http://lucidar.me/#collaps-3
• RFID mobile robot localization
• http://lucidar.me/#collaps-4
• Learn C programming
• Lesson 1.1. History of C programming language
• Lesson 1.2. First program
• Lesson 1.3. Compilation
• Lesson 1.4. Preprocessor directives
• Lesson 1.5. Which compiler to choose?
• Lesson 1.6. Flowchart
• Lesson 2.1. Types and variables
• Lesson 2.2. Integers
• Lesson 2.3. Floating point numbers
• Lesson 2.4. Characters
• Lesson 2.5. Variables initialization
• Lesson 2.6. Ariane flight 501
• Lesson 3.1. Arithmetic operators
• Lesson 3.2. modulo
• Lesson 3.3. Operators and types
• Lesson 3.4. Type casting
• Lesson 3.5. Bitwise operators
• Lesson 3.6. Bitwise operators details
• Lesson 3.7. Shifting operators
• Lesson 3.8. Assignment operators
• Lesson 3.9. Increment and decrement operators
• Lesson 3.10. Comparison operators
• Lesson 3.11. Logical operators
• Lesson 3.12. Operator precedence
• Lesson 4.1. printf
• Lesson 4.2. scanf
• Lesson 4.3. putchar
• Lesson 5.1. Conditional branching (if...else)
• Lesson 5.2. Nested if and indentation
• Lesson 5.3. Checking intervals
• Lesson 5.4. Ternary Operator ?:
• Lesson 5.5. switch..case statement
• Lesson 5.6. Break keyword in switch..case
• Lesson 6.1. do..while loop in C
• Lesson 6.2. While loop in C
• Lesson 6.3. For loop in C
• Lesson 6.4. How to choose the right loop in C ?
• Lesson 6.5. Exercices on loops in C
• Lesson 7.1. Bit masking
• Lesson 7.2. Bit masking, how to clear a bit in C?
• Lesson 7.3. Bit masking, how to set a bit in C?
• Lesson 7.4. Bit masking, how to toggle a bit in C?
• Lesson 7.5. Bit masking, how to check a single bit in C?
• Lesson 7.6. Overview of bit masking
• Lesson 8.1. Basic syntax of C functions
• Lesson 8.2. Calling C functions
• Lesson 8.3. Void keyword
• Lesson 8.4. Return keyword
• Lesson 8.5. Variable scope
• Lesson 8.6. Global variables
• Lesson 8.7. Static variables
• Lesson 8.8. Random numbers in C
• Lesson 8.9. Mathematical functions in C
• Lesson 9.1. Syntax of C arrays
• Lesson 9.2. Array initialization
• Lesson 9.3. Multidimensional arrays
• Lesson 9.4. How C arrays are stored in memory?
• Lesson 9.5. Arrays and functions
• Lesson 9.6. Exercises on C arrays
• Lesson 10.1. Strings in C
• Lesson 10.2. Null terminated string
• Lesson 10.3. The string.h library
• Lesson 10.4. String and functions
• Lesson 11.1. Introduction to pointers in C
• Lesson 11.2. Syntax of C pointers
• Lesson 11.3. Dynamic memory allocation
• Lesson 11.4. Incrementing pointers
• Lesson 11.5. Pointers as function argument in C
• Lesson 12.1. Introduction to structures in C
• Lesson 12.2. Properties of structures in C
• Lesson 12.3. Structures and pointers
• Lesson 12.4. Structures and functions
• Lesson 13.1. Recursive functions in C
• Lesson 13.2. Depth of recursive functions
• Lesson 13.2. Mutual recursion
• Lesson 14.1. Additional exercises
• http://lucidar.me/#collaps-5
• Best chess opening according to Stockfish
• How to use Stockfish in command line
• http://lucidar.me/#collaps-6
• How to change default language in CodeIgniter?
• How to create a contact form with CodeIgniter?
• How to create a custom 404 error page with CodeIgniter?
• How to perform basic DataBase operations with CodeIgniter?
• How to remove index.php from URL with CodeIgniter?
• How to slugify a string in CodeIgniter?
• How to install CodeIgniter on Ubuntu?
• http://lucidar.me/#collaps-7
• Ball and beam model
• Dynamic model of an inverted pendulum (part 1)
• Dynamic model of an inverted pendulum (part 2)
• Dynamic model of an inverted pendulum (part 3)
• Dynamic model of an inverted pendulum (part 4)
• Dynamic model of an inverted pendulum (part 5)
• Dynamic model of an inverted pendulum (part 6)
• Modelling of a simple pendulum
• Equation of closed and open loop systems
• PI-based first-order controller
• http://lucidar.me/#collaps-8
• Prediction of the evolution of the COVID-19
• Prediction of the evolution of the COVID-19 deaths in some countries
• Prediction of the evolution of the COVID-19 in some countries
• Modelization of COVID-19 for Mainland China
• http://lucidar.me/#collaps-9
• D3.js tutorial
• D3.js tutorial - Part 1 - Start with D3.js
• D3.js tutorial - Part 2 - Selectors
• D3.js tutorial - Part 3 - Basic methods
• D3.js tutorial - Part 4 - Method chaining
• D3.js tutorial - Part 5 - Create SVG and draw a circle
• D3.js tutorial - Part 6 - Basic shapes
• D3.js tutorial - Part 7 - Data binding
• D3.js tutorial - Part 8 - Bar chart
• D3.js tutorial - Part 9 - Resize chart
• D3.js tutorial - Part 10 - Scale chart
• D3.js tutorial - Part 11 - Responsive chart
• D3.js tutorial - Part 12 - Axes
• http://lucidar.me/#collaps-10
• List of 200 english irregular verbs
• List of 200 english irregular verbs in JSON format
• List of 200 english irregular verbs in text or .tsv format
• http://lucidar.me/#collaps-11
• How to compile C/C++ files with an external library
• How to install Qt Creator on Ubuntu 16.04?
• How to install Qt Creator on Ubuntu 18.04
• How to install Visual Studio Code on Ubuntu 18.04
• How to resize shared memory limit on Ubuntu 14.04
• How to swap variables in C or C++
• How to read XML files with Qt ?
• SHA-256 Library in C
• C++ std::vector
• http://lucidar.me/#collaps-12
• How to install Docker on Ubuntu 22.04?
• How to install and run Portainer on Ubuntu 22.04?
• How to reset Portainer password?
• Run MySQL and phpMyAdmin with Docker Compose
• http://lucidar.me/#collaps-13
• Adding copper pour in EAGLE
• Adding mounting holes to a PCB with EAGLE PCB software
• Create Solidworks 3D model from EAGLE
• EAGLE Tutorial - Part 1 - Control panel
• EAGLE Tutorial - Part 2 - Schematic editor
• EAGLE Tutorial - Part 3 - Board editor
• EAGLE Tutorial
• Install EAGLE 6.6 on Ubuntu 16.04
• Understanding layers in EAGLE PCB Software
• Usefull EAGLE ULP scripts
• http://lucidar.me/#collaps-14
• Change A31301 I²C address via EEPROM
• Connector MR30
• Datasheet for the AZDelivery Display SSD1306
• Hall effect sensor Allegro A31301
• Introduction to LoRa32 V2.1_1.6 Point-to-Point Communication
• Farad to watt.hour capacity converter
• Online resistance calculator
• http://lucidar.me/#collaps-15
• Built-in RGB led on an ESP32 FireBeetle DFR0654
• How to install ESP32 boards in the Aduino IDE?
• Linearity of the ESP32 ADC
• ESP32-DevKitC V4 real current consumption in deep sleep mode
• ESP32 FireBeetle DFR0478 real current consumption in deep sleep mode
• ESP32 FireBeetle DFR0654 real current consumption in deep sleep mode
• ESP32-S3-DevKitM-1 real current consumption in deep sleep mode
• ESP32 real current consumption in deep sleep mode
• http://lucidar.me/#collaps-16
• Finals of the French cup of Robotics 2018
• http://lucidar.me/#collaps-17
• Hosting Node.js Express website on Firebase wth ES modules
• Hosting a dynamic website on Firebase
• Hosting a static website on Firebase
• http://lucidar.me/#collaps-18
• Gridfinity, magnet polarity
• Gridfinity Super Light Baseplate
• http://lucidar.me/#collaps-19
• Inside a Xiaomi Aqara Relay
• Installation Template for the Linky Meter
• Customer tele-information on French electric meter Linky
• http://lucidar.me/#collaps-20
• Xsens MTi-3 (9-Axis IMU + AHRS)
• MPU-9250 and Arduino (9-Axis IMU)
• http://lucidar.me/#collaps-21
• D-Link DCS-5222L
• Foscam C2M IP camera
• Hikvision DS-2CD2742FWD-IS IP Camera
• Reolink RLC-520 IP Camera
• IP cameras for home automation
• http://lucidar.me/#collaps-22
• Simple and lightweight JavaScript Ajax module
• http://lucidar.me/#collaps-23
• Kalman filter example
• http://lucidar.me/#collaps-24
• Cherry MX switches
• How to use logkeys (keyboard sniffer) on Ubuntu?
• How to install logkeys (keyboard sniffer) on Ubuntu?
• Review of the Nuphy Air75 keyboard
• Review of the WEIKAV Sugar65 keyboard
• What are the best websites to practice typing?
• Keycaps for French AZERTY keyboards
• http://lucidar.me/#collaps-25
• Markdown blockquotes
• Markdown code and syntax highlighting
• Markdown emphasys
• Markdown headings
• Markdown horizontal lines
• Markdown images
• Markdown links
• Markdown lists
• http://lucidar.me/#collaps-26
• Calculating the transformation between two set of points
• Catmull-Rom splines
• Check if a number is prime online
• Check if a point belongs on a line segment
• Cross product
• Common derivatives rules
• Common derivatives
• Dot product
• How to calculate the intersection points of two circles
• How to check if four points are coplanar?
• Common integrals (primitive functions)
• Least square approximation with a second degree polynomial
• Least-squares fitting of circles
• Least-squares fitting of sphere
• The mathematics behind PCA
• Online quadratic equation solver
• Online square root simplifyer
• Sines, cosines and tangeantes of common angles
• Singular value decomposition (SVD) of a 2×2 matrix
• Tangent line segments to circles
• Understanding covariance matrices
• Weighted PCA
• http://lucidar.me/#collaps-27
• How to calculate intersection points between two circles in Matlab?
• Load MNIST database in Matlab
• Load MNIST database in Matlab
• Matlab optimization, example of function optimization
• The right way to make animations with Matlab
• http://lucidar.me/#collaps-28
• Angular and linear velocity, cross product
• Configurable gear for solidwork
• Elastic collision - Part 1 - Hypotheses
• Elastic collision - Part 2 - Velocity decomposition
• Elastic collision - Part 3 - Velocity calculation
• Elastic collision - Part 4 - Synthesis and reminder
• Elastic collision - Part 5 - Source code
• Elastic collision - Equations and simulation
• Enable Add-Ins in Solidworks
• Newton's Second Law of motion
• Geometric model for differential wheeled mobile robot
• How to insert gears in a Solidwoks assembly
• Mathematical model of a mechanical differential
• Model of a rotary joint driven by a linear motor [Part 2]
• Model of a rotary joint driven by a linear motor [Part 3]
• Model of a rotary joint driven by a linear motor [Part 4]
• Model of a rotary joint driven by a linear motor
• http://lucidar.me/#collaps-29
• MX Master 3: world best mouse
• http://lucidar.me/#collaps-30
• Monitor most popular dimensions
• Viewsonic monitors
• http://lucidar.me/#collaps-31
• Matlab TCP/IP socket sender and receiver
• http://lucidar.me/#collaps-32
• Neural networks curve fitting
• Datasets for deep learning
• Gradient descent example
• How popular are neural networks over the years?
• Install TensorFlow and Keras for Linux
• Learning rule demonstration
• Linear regression example
• Most popular activation functions for deep learning
• Most relevant deep learning research papers
• Neural Network Perceptron
• Simplest neural network with TensorFlow
• Simplest perceptron
• Single layer training algorithm
• Single layer classification example
• Gradient descent for neural networks
• Single layer limitations
• Neural networks
• http://lucidar.me/#collaps-33
• Add authentication of users with their Google account in Node.js / Auth0
• Install Atom on Ubuntu
• Install node.js on Ubuntu
• MySQL queries in Node.js
• Simple http web server with Node.js
• Simple web server with Express in Node.js
• http://lucidar.me/#collaps-34
• Convert degrees [°] to meters [m] and vice-versa
• Convert radians [rad] to meters [m] and vice-versa
• Convert radians [rad] to millimeters [m] and vice-versa
• http://lucidar.me/#collaps-35
• Convert inches [in] to centimeters [cm] and vice-versa
• Convert meters [m] to kilometers [km] and vice-versa
• Convert meters [m] to millimeters [mm] and vice-versa
• http://lucidar.me/#collaps-36
• How to install ownCloud server on Ubuntu 20.04
• http://lucidar.me/#collaps-37
• CAN bus motor controller for DC or BLDC motors
• CAN bus pressure sensor
• CAN bus shield for Raspberry Pi 3
• CAN bus ultrasonic distance sensor
• CAN bus time of flight distance sensor
• Low-cost PCB manufacturers
• http://lucidar.me/#collaps-38
• B2P2 variable geometry single tracked vehicle
• Interactive Chess Board - Student Projects
• Cooking Assistant - Student Projects
• IMU - Student Projects
• Smart Possession Arrow - Student Projects
• Smart Tank - Student Projects
• Smart Thermometer - Student Projects
• 2023 Student Projects
• Supercapacitor Solar Charger - Student Projects
• ToF Sensor - Student Projects
• http://lucidar.me/#collaps-39
• How to compute all the factors of a given number in Python
• Copy lists in Python
• Count list elements in Python
• Create lists in Python
• DataFrames in Pandas/Python
• Delete lists in Python
• Get list elements in Python
• How to get and parse HTML pages in Python?
• Insert, append, extend and concatanate lists in Python
• Install Visual Studio Code on Ubuntu for Python
• Iterate over lists in Python
• Matplotlib and Visual Studio Code
• Remove an element from a list in Python
• Reverse lists in Python
• Find elements in lists in Python
• Slice lists in Python
• http://lucidar.me/#collaps-40
• Quaternions and gyroscope
• Quaternion conjugate
• Quaternion normalization
• Quaternion product
• Quaternion to rotation matrix
• Quaternions and rotations
• http://lucidar.me/#collaps-41
• Flatten HTML
• How to get HTML content from Quill editor?
• WYSIWYG rich content editor. Part 1. The basics
• WYSIWYG rich content editor. Part 2. Check if bold
• List of WYSIWYG rich content editors
• How to insert MathJax formulas in Quill editor?
• Non editable span in contenteditable
• http://lucidar.me/#collaps-42
• List of the 100 most common passwords
• List of the 1,000 most common passwords
• List of the 10,000 most common passwords
• List of the 100,000 most common passwords
• List of the 1,000,000 most common passwords
• Load the most popular passwords in C / C++
• Load the most popular passwords in Node.js
• Load the most popular passwords in Python
• http://lucidar.me/#collaps-43
• How many characters in search engine queries?
• PageRank Google iterative algorithm
• PageRank Random Surfer
• http://lucidar.me/#collaps-44
• Convert bauds to bits per second
• Convert bauds to bytes per second
• C++ cross-platform RS232 serial communication library
• Most common baud rates table
• How to read and write arrays of bytes on serial port in C/C++
• How to read and write strings on serial port in C/C++
• How to list serial ports in C?
• What are the most used baud rates?
• http://lucidar.me/#collaps-45
• SFML - Part 1 - Installation and first program with Qt Creator
• SFML - Part 10 - Text and font
• SFML - Part 2 - Get available screen resolutions
• SFML - Part 3 - Display a sprite
• SFML - Part 4 - Moving a sprite with the keyboard
• SFML - Part 5 - Shaders
• SFML - Part 6 - Sprites and shaders
• SFML - Part 7 - Heat effect shader
• SFML - Part 8 - Water effect shader
• SFML - Part 9 - Sound and music
• SFML tutorial
• http://lucidar.me/#collaps-46
• Convert binary, decimal and hexadecimal
• Convert cubic meters of topsoil to tonnes
• Convert from binary to decimal and vice-versa
• Convert newton-metre [N.m] to kilogramme-centimeter [Kg.cm] and vice-versa
• Convert newton-metre [N.m] to millinewton-metre [mN.m] and vice-versa
• Convert meters per second [m/s] to kilometers per hour [km/h] and vice-versa
• Convert miles per hour [mph] to kilometers per hour [km/h] and vice-versa
• Convert newton-meter [N.m] to newton [N] and vice-versa
• Convert kilometers per hour [km/h] to radians per second [rad/s] and vice-versa
• Convert radians per second [rad/s] to meters per second [m/s] and vice-versa
• Convert radians per second [rad/s] to miles per hour [mph] and vice-versa
• Convert revolutions per minute [rpm] to radians per second [rad/s] and vice-versa
• Convert revolutions per second [rps] to radians per second [rad/s] and vice-versa
• Convert radians [rad] to degrees [°] and vice-versa
• Convert revolution per minute [rpm] to miles per hour [mph] and vice-versa
• Convert revolutions per minute [rpm] to kilometers per hour [km/h] with gear ratio and vice-versa
• Convert revolutions per minute [rpm] to kilometers per hour [km/h] and vice-versa
• Convert revolutions per minute [rpm] to meters per second [m/s] and vice-versa
• Convert revolutions per second [rps] to meters per second [m/s] and vice-versa
• http://lucidar.me/#collaps-47
• How to access to a Linux terminal on Universal Robots
• Pedestral base for Universal Robot UR5
• http://lucidar.me/#collaps-48
• Add icons on your web pages
• 3D image carousel in pure JavaScript and CSS
• Draw a circle in a square in pure CSS with ::before
• Comprehensive list of CSS frameworks
• How to Create a Svelte & Firebase Project
• CSS color table
• CSS styles for Rainbow code highlighter
• How to detect ad blockers on web sites?
• HTML drop-down list of citizenships.
• HTML five stars ranking
• How Bézier curves are described in SVG paths
• How to check if a number is prime in JavaScript
• How to get list of subdirectories in PHP
• How to automatically scroll to the bottom of the page in Google Chrome
• How to send dynamic data using Ajax?
• How to slugify a string in JavaScript?
• How to slugify a string in PHP?
• How to sort a multidimensional array in PHP?
• In PHP, how to convert a date in French?
• Levenshtein distance in mySQL
• List of supported languages by Prism syntax highlighter
• Nice HTML checkbox
• PHP array of countries and citizenships.
• Pure CSS loader
• Replace HTML checkbox with images
• Simple SSE in PHP
• Sessions or cookies?
• http://lucidar.me/#collaps-49
• Web development class
• Lesson 1.1. History of the Internet
• Lesson 1.2 Introduction to HTML
• Lesson 1.3. Special characters in HTML
• Lesson 1.4. Comments in HTML
• Lesson 1.5. Global structure of HTML pages
• Lesson 1.6. Hyperlinks in HTML
• Lesson 1.7. ID attribute in HTML tags
• Lesson 1.8. HTML anchors
• Lesson 1.9. Images in HTML pages
• Lesson 1.10. HTML tables
• Lesson 1.11. Most used HTML tags
• Lesson 1.12. Some advice
• Lesson 1.13. Ressources
• Lesson 2.1. Introduction to CSS
• Lesson 2.2. Inline CSS
• Lesson 2.3. Internal CSS
• Lesson 2.4. External CSS
• Lesson 2.5. CSS selectors
• Lesson 2.6. CSS colors
• Lesson 2.7. Margin and padding
• Lesson 2.8. CSS units
• Lesson 2.9. Most used CSS properties
• Lesson 3.1. History of JavaScript
• Lesson 3.2. JavaScript Hello World
• Lesson 3.3. Console.log
• Lesson 3.4. Comments in JavaScript
• Lesson 3.5. Variables in JavaScript
• Lesson 3.6. JavaScript events
• Lesson 3.7. Document Object Model (DOM)
• Lesson 3.8. Changing HTML
• Lesson 3.8. JavaScript frameworks
• Lesson 4.1. Introduction to PHP
• Lesson 4.2. PHP tags
• Lesson 4.3. PHP variables
• Lesson 4.4. isset vs empty vs is_null
• Lesson 4.5. PHP operators
• Lesson 4.6. PHP quotes
• Lesson 4.7. Tests in PHP: if .. else
• Lesson 4.8. PHP arrays
• Lesson 4.9. PHP loops
• Lesson 4.10. PHP sessions
• Lesson 5.1. HTML forms
• Lesson 5.2. HTML forms, POST or GET?
• Lesson 5.3. Input fields
• Lesson 5.4. HTML form fields
• Lesson 6.1. Introduction to MySQL
• Lesson 6.2. phpMyAdmin
• Lesson 6.3. SQL queries
• Lesson 6.4. Connect to MySQL in PHP
• Lesson 6.5. SQL queries in PHP
• Lesson 6.6. Getting data from MySQL in PHP
• Lesson 6.7. Get last ID
• http://lucidar.me/#collaps-50
• How to configure php.ini on AWS EC2 Cloud9?
• How to create a fresh AWS Cloud9 environment?
• How to install a virtual XAMPP web server on Lubuntu
• How to install a web server on Debian 11 with VirtualBox
• How to install and configure Xdebug on Ubuntu?
• How to install CodeIgniter 4 on Amazon AWS Cloud9 server
• How to install phpMyAdmin on Ubuntu?
• How to configure and run Apache server on AWS EC2 Cloud9?
• How to upgrade PHP to 7.2 on ubuntu?
• How to upgrade PHP to 7.3 on ubuntu?
• How to upgrade phpMyAdmin on Linux?
• How to install MySQL and phpMyAdmin on AWS EC2 Cloud9?
• Part 1. How to create new machine with VirtualBox?
• Part 2. How to install Debian 11 with VirtualBox?
• Part 3. How to configure Apache on Debian 11?
• Part 4. How to install PHP on Debian 11?
• Part 5. How to install MariaDB on Debian 11?
• Part 6. How to install phpMyAdmin on Debian 11?
• Part 7. How to install an FTP server on Debian 11?
• http://lucidar.me/#collaps-51
• ZigBee shield for Arduino
• Autopsy of a ZigBee frame
• OM15020 JN5169 NXP USB Dongle
• IEEE 802.15.4 ZigBee chips
• ZigBee frame encryption with AES-128-CCM*
• ZigBee sniffer
• http://lucidar.me/#top
• Legal notice

• https://friconix.com
• https://twitter.com/_Fifi_Lulu_
• https://www.tipeee.com/le-blog-a-lulu

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