This is a fire alarm working model using a tubelight starter. The starter contains a bi-metallic strip that responds to heat. When a flame (from a matchstick) is brought near, the heat bends the strip inside the starter, completing the electric circuit. This allows current to flow and activates the buzzer, simulating a fire alarm. … Read more
This is a Water Wheel Working Model. When water is poured over the bottle cap paddles, it rotates the wheel using kinetic energy of flowing water. This concept is used in hydroelectric power plants where water spins turbines to generate electricity. The model demonstrates conversion of water energy into mechanical energy. Materials Needed How to … Read more
This is a gravity-based water dispenser. When the water bottle is placed upside down, gravity pushes water toward the straw pipe. Opening the cap slightly allows air to enter, and water flows out through the straw into the glass. This demonstrates how gravity and air pressure can be used to dispense water without electricity or … Read more
This model shows how a water level indicator works. When the water reaches the level of the two safety pins, it completes the electric circuit, turning on the red LED light and the buzzer. This indicates that the tank is full and water should be stopped. It helps in preventing water overflow and wastage, and … Read more
This is an automatic street light working model without sensors. When a vehicle passes over a hump, it presses the push button below, turning on the LED street light. Once the vehicle leaves the hump, the button is released and the light turns off. This shows how street lights can work automatically using simple pressure … Read more
Project Theme: Simulate how a blood pressure monitor (sphygmomanometer) works using hydraulics and pressure concepts with syringes and a cardboard dial to show BP levels. Step-by-Step Video Instructions: 1. Make the Arm Cuff Simulator 2. Hydraulic Pressure Mechanism 3. Create the BP Dial 4. Pressure-to-Pointer Movement How It Works: https://howtofunda.com
In this DIY project, you’ll learn how to build a Streetlight Working Model using cardboard, LED lights, and a 9V battery. Step-by-Step Video Instructions: Manual Version (Switch-controlled): https://howtofunda.com
In this DIY video, learn how to make a Balanced Diet Wheel Working Model using cardboard, color paper, and a rotating pointer. This simple yet educational project helps students understand the different food groups and the importance of a balanced diet in an engaging way. Turn the arrow to any food group and explain the … Read more
In this video, learn how to build a fully functional Hydraulic JCB (Backhoe Loader) Model using cardboard, syringes, and tubes. This model is ideal for school science exhibitions and helps explain Pascal’s Law and real-world applications of hydraulics in construction machinery. Step-by-Step Video Instructions: 1. Create the Base: 2. Build the Cabin: 3. Construct the … Read more
In this video, you’ll learn how to make a Mini Air Cooler (AC) using cardboard, a DC motor, and simple tools. This project is perfect for school science fairs, teaching the concept of evaporative cooling and basic electrical motor use. Step-by-Step Video Instructions: 1. Build the Frame: 2. Add the Fan: 3. Make Cooling Pad … Read more
In this video, learn how to make a Hydraulic Powered Robotic Arm Working Model at home using syringes, cardboard, and pipes. This model demonstrates how hydraulics can be used to control the motion of robotic arms, just like those used in manufacturing industries and construction! Step-by-Step Video Instructions: 1. Base Construction: 2. Build the Arm … Read more
A hydroelectricity generator converts water flow energy into electrical energy using a turbine and generator. This method is commonly used in hydropower plants to produce renewable electricity. Hydroelectricity Generator Working Model Making This DIY working model will demonstrate how flowing water can generate electricity using a rotating turbine made of bottle caps, a DC generator, … Read more
Rainwater harvesting is the process of collecting, storing, and using rainwater for agricultural purposes. It helps in water conservation, groundwater recharge, and irrigation during dry seasons. This DIY working model will demonstrate how rainwater is collected, stored, and reused for irrigation using a DC water pump and a 9V battery. Materials Required: Steps to Make … Read more
Control (Ctrl) shortcut keys are keyboard combinations that help users perform common tasks quickly. These shortcuts are used with the Ctrl key along with another key to execute commands. Common Control Shortcut Keys and Their Functions: Basic Editing Shortcuts File Management Shortcuts Text Formatting Shortcuts Navigation Shortcuts Browser Shortcuts These shortcuts increase efficiency by reducing … Read more
The sectors of the Indian economy are divided into three main categories based on the type of economic activity: 1. Primary Sector (Agriculture & Natural Resources) 2. Secondary Sector (Manufacturing & Industries) 3. Tertiary Sector (Services & Trade) Relation Between the Sectors: How to make 3D working model on the sectors of the Indian economy … Read more