Electronics

In this lesson we have our first contact with semiconductor materials. These materials are used to make electronic components, such as the diode and the transistor. With transistors we can make up automatic circuits in which we use a sensor to activate an electric receiver.

In this video we use a light sensor (ldr) to make a light bulb work. When the sensor detects light, the light bulb doesn't shine. When we cover the light sensor, the light bulb shines.

In this second video we use a temperature sensor (ntc) to make a light bulb work. If we don't touch the sensor, the environmental cold makes the light bulb shine. When we touch the sensor, our heat makes the light bulb remain without shining.