FUNDAMENTALS OF COMPUTER

Detailed explanation-1: -Let’s start with the power pins. The Raspberry Pi can provide both 5v (pins 2 and 4) and 3.3v (pins 1 and 17) power.

Detailed explanation-2: -The voltage of a pin is labelled on the reference guide. 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.

Detailed explanation-3: -The Raspberry Pi can set the pin to take either value and treat it as an output, or it can detect the value of the pin and treat it as an input. There are twenty-six pins in total: three power supply pins, 3V3 (3.3V), 5V0 (5.0V) and GND (0V); 6 DNC (do not connect) pins; and seventeen GPIO pins.

Detailed explanation-4: -3V3-Pin 1 and 17 This means 3.3 volt. The 3V3 pins can be used power low energy consuming parts, like a couple of LED’s. Never use more than 50 mA, so for example no more than 2 LED’s. 5V0-Pin 2 and 4 This means 5.0 volt.

Detailed explanation-5: -The Pi is engineered to work at 5 volts, plus or minus 5% (4.75-5.25 volts). If you supply less voltage than required, the Pi won’t power on. Which is why you shouldn’t attempt to power your Pi by plugging into a laptop or desktop computer.