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The Pretend Engineer

The Pretend Engineer

Aerospace logic. Acres of problems.


  • March 20, 2026

    Rapid Shutdown System

    Rapid Shutdown System

    This post in the Solar Installation Series discusses the Tigo rapid shutdown system for solar power setups, a crucial safety feature mandated since 2017. It details equipment requirements, installation, and operation protocols to ensure compliance and safety. The system effectively reduces voltage during emergencies, enhancing safety for first responders and users.

  • March 17, 2026

    Kinetic and Potential Energy

    Kinetic and Potential Energy

    This lesson explains kinetic and potential energy. Kinetic energy is derived from an object’s motion, while potential energy depends on its position and height. Key formulas are presented, illustrating energy conservation in closed systems, such as roller coasters. Real-world examples, including baseballs and bullets, highlight the significance of these energies.

  • March 13, 2026

    Guide to Wiring Solar Power Equipment

    Guide to Wiring Solar Power Equipment

    This post, part six of a solar installation series, focuses on wiring the EG4 battery and inverter system. It covers equipment, wire management, and key connections, emphasizing the importance of safe installation practices. The author shares DIY solutions for organizing wiring, including 3D-printed looms, and discusses the integration of AC power into the system.

  • March 10, 2026

    Understanding Forces in Physics

    Understanding Forces in Physics

    This post discusses the fundamental concept of forces in physics, exploring both contact and non-contact forces, including applied, normal, friction, drag, tension, and spring forces. It emphasizes differences between weight and mass, explains the principles of Newton’s Laws, and highlights practical examples to enhance understanding of how forces interact in various scenarios.

  • March 6, 2026

    The Ultimate Guide to Building a Solar Equipment Shed

    The Ultimate Guide to Building a Solar Equipment Shed

    This post details the construction of a solar equipment shed designed to securely store heavy batteries and inverters while adhering to safety regulations. Key design features include fire-resistant materials, proper ventilation, and planned capacity for future expansion. The structure aims to optimize space and minimize fire risks effectively.

  • March 3, 2026

    Newton’s Laws of Motion

    Newton’s Laws of Motion

    This post covers the basics of Newton’s Laws of Motion and gives visual references. It is intended to be an introduction to the Laws of Motion.

  • February 27, 2026

    Quick Tips for DIY Solar Panel Installation

    Quick Tips for DIY Solar Panel Installation

    This post, part four of a solar installation series, details the installation process of solar panels on a roof. It emphasizes the importance of electrical setup, safety regulations like the Rapid Shutdown System, and proper grounding of rails. The installation took about five hours, and planning is essential for a successful outcome.

  • February 24, 2026

    Review of Vevor’s Ultrasonic Cleaner

    Review of Vevor’s Ultrasonic Cleaner

    The author reviews Vevor’s Ultrasonic Cleaner, emphasizing its effectiveness and ease of use for cleaning parts during a bandsaw refurbishment. Despite minor drawbacks like long heating times and sound, it excels in removing grime when paired with a degreaser. Overall, it is recommended for its value and performance.

  • February 20, 2026

    Lifting Solar Panels – Innovative Solutions

    Lifting Solar Panels – Innovative Solutions

    Sometimes you get caught in a place where you need to engineer your way out. This happened to me when I had everything lined up to install my solar panels only to not have a lift. So I engineered a solution!

  • February 17, 2026

    DC Circuits – Series vs Parallel

    DC Circuits – Series vs Parallel

    Introduction Today, we are covering the difference between series and parallel circuits, and some of the related math and what it means. This is a basic understanding of this topic to help my readers understand the concepts employed in other posts. If you have not read DC Circuits – Basics, I encourage you to do…

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