sowmya 
Building a traffic light working model using three different color LED lights, a 9V battery, and three switches is a great way to demonstrate the traffic light working principle. Here’s a step-by-step guide to create this model: Materials Needed: Video Steps to Build the Model 1. Prepare the Base: 2. Mount the LEDs: 3. Wiring … Read more
To build a barrier gate working model using a robo motor, car toy big wheel, paper straw (as the gate), and a 9V battery, follow these step-by-step instructions. This model demonstrates how barrier gates work, using basic materials and a DC motor to simulate the lifting and lowering of road gates at crossings or parking … Read more
A regenerative energy working model using two DC motors, a 9V battery, a switch, and toy car wheels can demonstrate how mechanical energy is converted into electrical energy and then reused. This model gives a practical demonstration of regenerative energy by recycling some of the energy from a mechanical system into electrical energy! Here’s how … Read more
A hydraulic lift working model using a syringe and cardboard is a fun and simple project to demonstrate the principles of hydraulics. The hydraulic lift model works on Pascal’s Law, which states that pressure applied to a fluid is transmitted equally in all directions. When you push the plunger of one syringe, it creates pressure … Read more
Creating a water tank overflow alarm working model using a water sensor is a simple and effective project to demonstrate how technology can prevent water wastage. The project will detect when the water in the tank reaches a certain level and trigger an alarm to notify that the tank is full. Here’s a step-by-step guide … Read more