Engineering Concepts

Option 1: pi@raspberrypi:~ $ sudo nano /etc/rc.local #add path before exit 0 line: su - pi -c "sleep 10 && export DISPLAY=:0 && cd "folderPath" && /usr/bin/python3 fileName.py" & CTRL+O  // to save the changes Enter CTRL+X  // to close the file editor pi@raspberrypi:~ $ sudo reboot (To check the autostart of the software app.) Option 2: go to /home/pi/.config create an autostart folder create a .desktop file into this. add path of an autoreboot.sh file to it with delay : app.Desktop file [Desktop Entry] Exec=sh -c "sleep 15; /home/pi/on_reboot.sh" Create a virtual environment myenv add app folder to myenv create a on_reboot.sh file in /home/pi/ folder.  Add following paths into this file: #!/bin/bash source /home/pi/Documents/myenv/bin/activate cd /home/pi/Documents /myenv/MyApp python3 app.py sudo reboot to check the autostart of the software app.

It involves a few key steps. Here’s a complete guide to get it working: 1. Gather Required Materials Raspberry Pi 3B+ (with Raspbian OS installed) USB thermal printer USB cable to connect the printer Printer paper Power supply for the Raspberry Pi and printer 2. Connect the Printer Connect the thermal printer to the Raspberry Pi via the USB port. Ensure the printer is powered on and loaded with paper. 3. Install Required Packages Open the terminal on your Raspberry Pi and install the necessary software: Download the driver software for the printer.  Use install.sh file to install it. $ chmod +x install.sh       // make the install.sh file executable $ sudo ./install.sh        // run the install.sh  $ sudo apt install cups libcups2-dev printer-driver-escpr CUPS (Common Unix Printing System) is a printing system that allows the Raspberry Pi to communicate with printers. printer-driver-escpr includes drivers for many thermal printers. 4. Add U...

  The NI cRIO-9035 and NI cRIO-9053 are both CompactRIO controllers that include integrated FPGA resources for real-time and FPGA-based applications, but there are some differences in the FPGA resources they provide. Below is a comparison of the FPGA resources for both models: 1. NI cRIO-9035 cRIO-9035 Chassis with 8-slots Number of Ethernet Ports on Controller:  2 Slot Count:  8 Conformal Coated:  No Processor Core:  1.33 GHz Dual Core Intel Atom RAM Size:  1 GB Hard Drive Memory Size:  4 GB Programming Method:  LabVIEW FPGA Operating Temperature Range:  -20 °C to 55 °C GigE Vision Support:  Yes FPGA:  Kintex-7 70T 2. NI cRIO-9053 cRIO-9053 Chassis with 4-Slots Number of Ethernet Ports on Controller:  1 Slot Count:  4 Conformal Coated:  No FPGA: Xilinx  Artix-7 50T GigE Vision Support:  Yes Operating Temperature Range:  -20 °C to 55 °C Processor Core:  1.33 GHz Dual Core Intel Atom RAM Size:...

Git Version Control System Version Control System (VCS) have seen great improvements over the past few decades and some are better than others. VCS are sometimes known as SCM (Source Code Management) tools or RCS (Revision Control System). One of the most popular VCS tools in use today is called Git.  Like many of the most popular VCS systems available today, Git is free and open source.  Git is a mature, actively maintained open source project originally developed in 2005 by Linus Torvalds, the famous creator of the Linux operating system kernel. Git is a  Distributed Version Control System , a category known as DVCS.  Rather than have only one single place for the full version history of the software as is common in once-popular version control systems like CVS or Subversion (also known as SVN), in Git, every developer's working copy of the code is also a repository that can contain the full history of all changes. Some frequently used commands for Git Hub : 1...

WPF (Windows Presentation Foundation) and WinForms (Windows Forms) are both frameworks provided by Microsoft for building Windows desktop applications, but they have some key differences: UI Design Approach : WinForms : WinForms uses a more traditional approach to UI design, where controls are positioned using absolute coordinates. It follows a procedural programming model. WPF : WPF uses a more modern approach called "declarative programming", where UI elements are defined using XAML (eXtensible Application Markup Language) and are more flexible in terms of layout. WPF also supports a more powerful data binding system, allowing for easier separation of UI and business logic. Graphics and Multimedia : WinForms : WinForms provides basic support for graphics and multimedia, but it's limited compared to WPF. WPF : WPF has built-in support for hardware-accelerated graphics, 2D and 3D rendering, animations, and multimedia. It provides richer visual capabilities out of the box....

  Stack Memory Stack is a linear data structure that follows the LIFO (Last-In-First-Out) principle. The stack is managed by the CPU, there is no ability to modify it. Variables are allocated and freed automatically. The stack it not limitless – most have an upper bound. The stack grows and shrinks as variables are created and destroyed Stack variables only exist whilst the function that created them exists       Stack of Books                                                                  Stack of Coins       

10 important links to practice and study for coding interviews : 1.  patterns to ace any coding interview:  https://lnkd.in/gBu9uZtz 2. Backtracking solution for 10 popular problems:  https://lnkd.in/gjpC9MCC 3. Dynamic Programming patterns for beginners:  https://lnkd.in/gevrxmmy 4. All Graph algorithms in one place:  https://lnkd.in/g2xdz7TY 5. When to use two pointers?:  https://lnkd.in/gqzEDmf6 6. Sliding Window algorithm made easy:  https://lnkd.in/gnDS8sJn 7. Ultimate Binary Search guide:  https://lnkd.in/gg_BB6ik 8. How to solve Linked List problems?:  https://lnkd.in/gp7FgTGx 9. Comprehensive Data Structure and Algorithm study guide:  https://lnkd.in/gcUnWavF 10. How to effectively use Leetcode:  https://lnkd.in/gEuRT4ik