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What is PCB and how does it work?

 A Printed Circuit Board (PCB) is a fundamental component in electronic devices, providing the physical structure to mount and connect electronic components. The process of working with a PCB involves designing, fabricating, assembling, and testing. Below is a simplified guide on how to work with a PCB: 1. Designing a PCB PCB design is the first and crucial step. It involves creating a blueprint of the electrical circuit that will be etched onto the board. Choose PCB Design Software : Common tools include KiCad , Eagle , Altium Designer , or EasyEDA . Schematic Diagram : Create a schematic that shows how components are connected (e.g., resistors, capacitors, ICs). Component Placement : In the PCB design software, place components on the board. The design should consider the physical size and pin connections of the components. Routing : This is the process of connecting the components via traces (the electrical pathways). Ensure proper routing to minimize interference and avoid s...
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Android versions list A to Z

1. Android 1.0 (Apple Pie) – September 2008

  • First Android release.
  • Basic smartphone features: phone dialer, contact list, web browser, camera support, and access to Google services like Gmail and Maps.
  • No on-screen buttons (hardware navigation buttons were used).

2. Android 1.5 (Cupcake) – April 2009

  • On-screen keyboard: The introduction of the first software keyboard, replacing the hardware keyboards.
  • Video recording: Added video recording capability to the camera.
  • Widgets: Home screen widgets, improving user interaction.
  • Copy and Paste: Initial clipboard support.

3. Android 1.6 (Donut) – September 2009

  • Faster performance: Improvements to speed and UI performance.
  • Expanded screen support: Supports a variety of screen sizes and resolutions.
  • Updated Search: Added voice search functionality.
  • App management: The ability to install and update apps via the Android Market.

4. Android 2.0 - 2.1 (Eclair) – October 2009

  • Enhanced Google Maps: Improved maps with turn-by-turn navigation.
  • Multiple accounts: Syncing of multiple email accounts (e.g., Exchange support).
  • Improved Camera: Flash support and better camera interface.
  • Live wallpapers: First appearance of live wallpapers.

5. Android 2.2 (FroYo) – May 2010

  • Performance improvements: Speed optimizations, including JIT (Just In Time) compiler for better performance.
  • Flash support: Integrated Flash 10.1 support in the browser.
  • Wi-Fi hotspot: Ability to turn the phone into a mobile hotspot.
  • App2SD: Ability to install apps onto the SD card to save internal storage.

6. Android 2.3 (Gingerbread) – December 2010

  • UI improvements: Refined user interface with darker colors.
  • NFC support: Near-field communication for data sharing and mobile payments.
  • Improved gaming: Game development APIs and sensors for better game performance.
  • Battery improvements: Optimizations for battery life.

7. Android 3.0 - 3.2 (Honeycomb) – February 2011

  • Tablet-specific UI: A new, tablet-optimized user interface, featuring a more prominent action bar.
  • Multitasking: Improved multitasking with the ability to switch between apps more easily.
  • Google Talk with video chat: Integrated video calling using Google Talk.

8. Android 4.0 (Ice Cream Sandwich) – October 2011

  • Unified UI: A unified user interface for both smartphones and tablets.
  • Face Unlock: First version to introduce face recognition for unlocking.
  • Improved multitasking: More intuitive task-switching and notifications.
  • New font: Introduced Roboto as the system font.
  • Android Beam: Introduced NFC-based content sharing.

9. Android 4.1 - 4.3 (Jelly Bean) – July 2012

  • Project Butter: Focused on performance improvements, making the UI smoother.
  • Google Now: Virtual assistant powered by Google search.
  • Notification improvements: More interactive notifications.
  • Expandable notifications: Notifications could now show more content and be interacted with.

10. Android 4.4 (KitKat) – October 2013

  • New design: Flat design with emphasis on minimalism.
  • OK Google: Added "OK Google" hotword detection for voice searches.
  • Immersive Mode: Hides the status bar for a full-screen experience in apps and games.
  • Improved performance: Optimizations for low-end devices.
  • Bluetooth improvements: Support for Bluetooth LE (Low Energy).

11. Android 5.0 (Lollipop) – November 2014

  • Material Design: A fresh design language with new animations, shadows, and vibrant colors.
  • ART Runtime: Replaced Dalvik with ART (Android Runtime) for improved performance.
  • Battery saver mode: New power-saving features.
  • Notifications overhaul: Introduced lock screen notifications and actionable notifications.

12. Android 6.0 (Marshmallow) – October 2015

  • Permissions system: Apps now ask for permissions individually instead of all at once during installation.
  • Doze mode: A new power-saving feature that reduces background activity when the phone is idle.
  • Google Now on Tap: Integration of Google Now with contextual information from apps.
  • USB Type-C support: Native support for USB Type-C connections.

13. Android 7.0 (Nougat) – August 2016

  • Split-screen multitasking: Ability to run two apps side by side.
  • Doze on the go: Improved power-saving Doze mode that works while on the go.
  • Daydream VR: Support for Google’s virtual reality platform.
  • Quick settings: Redesigned quick settings panel with additional toggles.
  • Bundled notifications: Notifications grouped by app.

14. Android 8.0 - 8.1 (Oreo) – August 2017

  • Picture-in-Picture mode: Support for running apps in a small floating window while using other apps.
  • Notification channels: Categorized notifications for better management.
  • Autofill framework: Automatically filling in passwords, addresses, etc.
  • Background limits: Restrictions on background processes for better battery life.
  • Google Play Protect: A security feature that scans apps for malware.

15. Android 9.0 (Pie) – August 2018

  • Gestural navigation: First introduction of gesture-based navigation (replacing traditional buttons).
  • Adaptive battery: AI-based power management to prioritize battery use.
  • Digital Wellbeing: Tools to monitor and manage screen time.
  • App actions and slices: Contextual shortcuts for apps and slice previews.

16. Android 10 – September 2019

  • Dark mode: System-wide dark theme for a more comfortable viewing experience.
  • Gesture navigation: Enhanced gesture controls, replacing the traditional three-button navigation system.
  • Privacy improvements: More control over location, data, and permissions.
  • Focus mode: Helps users reduce distractions by limiting apps.
  • Live Caption: Automatic captions for media playback.

17. Android 11 – September 2020

  • Bubbles: A new way to chat with apps in a floating bubble format, similar to Facebook Messenger.
  • Screen recording: Native screen recording feature.
  • One-time permissions: Temporary permissions for apps to access sensitive data.
  • Conversations: Dedicated space for conversations in the notification shade.
  • Smart home controls: Direct control of smart devices from the power menu.

18. Android 12 – October 2021

  • Material You: Major redesign of the user interface, allowing dynamic theming based on the wallpaper.
  • Privacy Dashboard: A tool to show which apps accessed sensitive data (location, microphone, etc.).
  • Mic and camera indicators: Real-time indicators for when the mic or camera is being used.
  • Haptic feedback: Enhanced haptic feedback for more immersive experiences.

19. Android 13 – August 2022

  • Theming improvements: Expanded Material You with custom color palettes and broader UI theming.
  • Spatial Audio and Bluetooth LE Audio: Support for better audio experiences.
  • More privacy controls: Restrictions on clipboard access, improved photo picker, and privacy for notifications.
  • Multi-device support: Enhanced support for apps and settings across multiple devices.

20. Android 14 – August 2023

  • Refined user interface: More extensive customizations for the user interface, allowing greater personalization.
  • Improved security and privacy: Further controls for managing sensitive data and background processes.
  • Extended Battery life features: New features aimed at extending battery life with AI-based enhancements.
  • Cross-platform compatibility: Enhanced compatibility with a wide range of devices including foldables, tablets, and wearables.
Each Android version built upon the last, with a focus on improving performance, security, battery life, and user experience while introducing features that were ahead of their time.

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