How to Make a Projector Working Model at Home using Big Bulb filled with water, Mobile Phone and Cardboard Box

Creating a simple projector working model at home using a big bulb filled with water, a mobile phone, and a cardboard box can be an exciting project.

This approach, often known as a water lens projector, utilizes the principle of refraction to magnify and project images onto a surface. Follow these step-by-step instructions:

Materials Needed:

  1. A large cardboard box
  2. Big bulb or flashlight
  3. Mobile phone with videos or images to project
  4. Water
  5. Plastic or glass container (for the water-filled bulb)
  6. Magnifying glass or lens
  7. Cutter or scissors
  8. Tape
  9. Ruler
  10. Pencil
  11. Black paper or cloth (optional, for light control)

Instructions to Make Mobile Phone Projector:

How to Make a Projector Working Model at Home | inspire science fair project | DIY| howtofunda

Step 1: Choose a Suitable Box

  • Select a large cardboard box that can comfortably house your mobile phone and allow for adjustments to focus and image size.

Step 2: Cut Openings

  • Cut a rectangular opening on one side of the box. This will serve as the projection screen.
  • On the opposite side, cut a smaller hole for the water-filled bulb to emit light into the box.
  • Cut a small opening on the top for the mobile phone’s camera to capture images.

Step 3: Prepare the Water-Filled Bulb

  • Fill a plastic or glass container with water.
  • Submerge the big bulb into the container, making sure it is filled with water. Seal the opening of the bulb with tape or a cap to prevent water leakage.

Step 4: Place the Mobile Phone

  • Insert your mobile phone through the top opening, ensuring the camera aligns with the lens.
  • Adjust the position until the phone is secure, and the lens captures a clear image.

Step 5: Secure the Water-Filled Bulb

  • Place the water-filled bulb inside the box through the opening you cut for it. This will serve as the light source.

Step 6: Adjust the Focus

  • Move the mobile phone back and forth or adjust its position until the image on the screen is in focus. You can also use the phone’s focus adjustment feature.

Step 7: Control Light Exposure (Optional)

  • To enhance the projection quality, cover the openings with black paper or cloth to control light exposure. This step helps create a darker environment inside the box.

Step 8: Dim the Ambient Light

  • To improve image clarity, dim the lights in the room where you are using the projector.

Step 9: Test and Enjoy

  • Turn on the mobile phone and project videos or images onto the screen. Experiment with different sizes and distances to find the optimal setup.

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