“Gear Reduction Mechanism Educational Model”4 Gear System DIY “Limited time promo – launch price” | LED Power Demo | STEM Model

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Compact and durable mechanical gear generator powered by hand motion. This model uses a 4-gear system inside a reinforced housing, designed for smooth rotation and long-lasting use. It converts manual movement into electrical energy when paired with a generator. ⚙️ Perfect for: STEM learning Mechanical demonstrations DIY electronics Educational projects 🔧 Required parts (not included): 8x ball bearings (22mm outer diameter) 4x steel shafts (8mm diameter, 120mm length) 12V DC generator (or compatible) 💡 Function: By rotating the handle, motion is transferred through the gear system to drive the generator. 🔋 Usage example: Can power an LED light while turning the handle Great for testing small electronics This is a mechanical energy demonstration model. Output depends on rotation speed, generator type, and user input. 📏 Important Note on Dimensions The dimensions of this model are carefully designed to ensure proper functionality. ⚠️ If the dimensions are changed or scaled, the model may not function correctly and mechanical parts may not fit or work as intended. For best results, use the original dimensions as provided.