TNNJoy Studio Notes

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Jul 27, 2026

How to Fix OpenWeatherMap City ID Deprecation on ESP8266 Weather Clocks

A step-by-step guide to patching your Arduino code and restoring live weather data on your DIY desk clock.

Jul 19, 2026

DIY 3D Wooden Marble Run Kit: The Perfect Gift for Puzzle Builders

An in-depth look at the design, assembly experience, and tips for building a flawless mechanical marble maze.

Jul 19, 2026

How to Fix a Jammed Push-to-Eject Precision Screwdriver Case

A simple guide to repairing the spring-loaded release mechanism on your 46-in-1 tool kit.

Jul 19, 2026

Why Does My DIY Radio Always Power Up at Max Volume? (And How to Fix It)

Understand why your DIY FM Radio Kit resets to a loud volume (Level 8) on startup, and learn how to easily calibrate the trimmer pot and fix level 0 audio bleed.

Jul 19, 2026

How to Solder SMD Components: The Step-by-Step Guide for DIY FM Radio Kits

Master the art of soldering 16-pin SMD chips flush to your PCB with no pre-drilled holes using our step-by-step DIY guide.

Jul 18, 2026

The Birth of the Jet Age: The History of the First Jet Engine

How did we break past the speed limits of propeller flight?