Power regulation by most common 7805 IC


Today, I will tell you about a very small, ignored and THE most important component while building a robotic or embedded system. Yes, that is 7805 voltage regulator IC. 

It is a member of 78xx series of fixed linear voltage regulator ICs. The voltage source in a circuit may have fluctuations and would not give the fixed voltage output. The voltage regulator IC maintains the output voltage at a constant value. The xx in 78xx indicates the fixed output voltage it is designed to provide. 7805 provides +5V regulated power supply. Capacitors of suitable values can be connected at input and output pins depending upon the respective voltage levels.