This is the first tutorial on the interrupt series of tutorials on stm32f4discovery board. In this tutorial we will learn about interrupts. We will get to know what is meant by interrupts. How interrupt process works. Why to use interrupt. What benefits you will get if you use interrupt driven approach. After that we will start creating a circuit with stm32f4discovery board, breadboard, leds, switch and connecting wires. We will build this circuit for understanding and practically seeing how interrupt works in microcontroller world.