GloGravity is a sustainable lighting solution that utilizes gravitational potential energy to create an LED light without the need for electricity, batteries, or fuel. This project is designed for off-grid communities, particularly in rural or disaster-affected areas, and provides a safer, cleaner alternative to hazardous kerosene lamps and disposable batteries. It also promotes environmental sustainability by reducing the use of non-renewable energy sources.

The lamp utilizes a simple pulley and weight system. The materials used include a sprocket, chain, adjustable dumbbell with round plates (2.5 kg and above), a DC dynamo, wires, and an LED light. The base and frame were constructed using a peg board to provide support for the pulley. A DC dynamo was attached to the pulley axle to convert mechanical energy into electrical energy. The LED was then connected to the dynamo's output. When the weight is lifted and released, it gradually descends under gravity, spinning the dynamo. This motion generates enough electricity to light the LED.

Figure 1. GloGravity model (front)

Figure 2. GloGravity model (back)

Tests were conducted using various weights to observe changes in brightness and lighting duration. It was observed that a maximum of 2.5 kg was required to power the LED. Heavier weights produced brighter light but shortened the duration as the weight decreased more quickly. Despite fluctuating power from the dynamo, the LED still functioned steadily, showing

that no complex voltage regulator was needed. GloGravity demonstrates that gravitational energy can be an effective and environmentally friendly source of light in areas without electricity. Its simplicity and flexibility make it suitable for households in remote areas or during emergencies. The project highlights a key trade-off between brightness and duration, allowing users to determine the optimal balance based on their needs. With minimal materials and low cost, GloGravity has potential for wider application as a safe and sustainable lighting option for the future.

Authors: Aisha Nabiha binti Zulkifly, Nur Wafa Huda binti Mohd Nazron, Noor Alia Adila binti Baharruddin, Nur Damia Batrisyia binti Kaswadi, Nur Alsyaurah Aina binti Sharil, Gs. Dr. Ya'akob bin Mansor, Nur Ain Asyiqin binti Anas.

Date of Input: 05/06/2025 | Updated: 05/06/2025 | emma