This course is about INTEL 8051 microcontroller. This course includes 8051 microcontroller Architecture, Instruction sets with examples, Assembly language Programs, Timers & Counters, Interrupts, Serial port programming, and how to interface external memory devices with 8051 microcontrollers. This course targets students from beginners to any level. How to use a 40 pin microcontroller chip is taught clearly in this course. At the end of this course, students will be able to program 8051 microcontrollers effectively for various applications. After completion of this course, a student can achieve maximum marks since my presentations are pointwise specific. As an industrialist, one can earn clear knowledge about 8051 so that they can apply it while doing projects. After studying this course you can easily understand any other microcontroller