I have been digging through the old toys at home to extract electrical components that I can use in the projects.
Here a teddy donated his organs for the purpose of engineering. Thank you friend.
The doll would light up and play a melody when tapped gently.
It used an electrical component called a piezo electric sensor to detect movements, taps, vibrations.
Here is a demonstration of how a piezo electric sensor works.
In this project, I have used a piezo sensor to light up an led. When the sensor is pressed or dropped the led lights up.
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