Resistor is necessary when connecting an LED to a 9V battery, it reduces the amount of current flowing through the LED and prevents it from burning out.

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In this tutorial, we will explore how to utilize a push button to control an LED. The push-button circuit consists of a switch,resistor and an LED.

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Build your own challenging steady hand game where you have to move a metal stick through a twisted wire without touching the sides.

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This simple circuit allows you to turn on an LED with just the touch of your finger! Today I am going to make a simple touch sensor using the transistor BC547.

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In this project, we will build a LED Dimmer Circuit. For this circuit, we will use a BC547 NPN transistor. Using only a transistor and a potentiometer.

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A dark detector circuit is a circuit that can detect the presence of darkness or absence of light. It can be used to detect the presence of night.

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