I want to know the meaning of 1,2,3,4 and what all are the uses of it in ic
please help me to learn this to be a robotics enginer
It sounds like you are referring to the pin numbers (connection numbers) on the package of an integrated circuit. The manufactuirer's data sheet for the part will tell you the electrical function of eah pin. If you are not referring to IC pin numbers, please could you restate the question?