Use of Voltage Regulator ICs in Robotics - 7805 / 7809 / 7812

What is voltage regulator IC ?

 The 78xx (sometimes L78xx, LM78xx, MC78xx...) is a family of self-contained fixed linear voltage regulator integrated circuits. The 78xx family is commonly used in electronic circuits requiring a regulated power supply due to their ease-of-use and low cost. For ICs within the family, the xx is replaced with two digits, indicating the output voltage (for example, the 7805 has a 5 volt output, while the 7812 produces 12 volts). The 78xx line are positive voltage regulators: they produce a voltage that is positive relative to a common ground. There is a related line of 79xx devices which are complementary negative voltage regulators. 78xx and 79xx ICs can be used in combination to provide positive and negative supply voltages in the same circuit.

Practical Definition - Voltage regulator, any electrical or electronic device that maintains the voltage of a power source within acceptable limits.

How to make a line follower robot using logic gates

Introduction:

Here we are going to see about logical control robot, which means we have take some condition that it can satisfies 3 conditions:- In this we are going to take Move Forward, Backward and Stop. For that we are going to use any 2 logic gates which should satisfies 3 conditions and Driver IC for Motor.
In this project we can see about the following concepts-
•    Power Supply or 9/12v battery
•    DC Geared Motor or BO-Motor
•    Basic Motion of Robot
•    Logic used in the Running the robot
•    Logic Gates
•    Driver IC