FUNDAMENTALS OF COMPUTER

Detailed explanation-1: -A Raspberry Pi 4 board has 40 pins on it. Among these pins, we have four power pins on the Raspberry Pi, two of which are 5v pins and another two are 3.3v pins. The 5v power pins are connected directly to the Raspberry Pi’s power input and we can use these pins to run low power applications.

Detailed explanation-2: -Sensors are another type of input that can be connected to the Raspberry Pi. They may gather data about, for example, light or temperature conditions, but fundamentally they work in a similar way to the push button: they provide different input to the Pi depending on something that is happening externally.

Detailed explanation-3: -The Raspberry Pi has a 40-pin GPIO (General Purpose Input/Output) connection, which makes it very easy to connect to the outside world. To connect the GPIO to external sensors, you can: Connect the sensors directly to the GPIO pins using jumper wires.

Detailed explanation-4: -There are two 5V pins and two 3V3 pins, as well as a number of ground pins (0V), which are unconfigurable. The remaining pins are all general-purpose 3V3 pins, meaning that the outputs are set to 3.3 volts and the inputs are tolerant of 3.3 volts.