Interfacing Microcontroller 8225 The INTEL 8255 is a general purpose programmable peripheral interface. It is used to perform a variety of input/output functions in a microcomputer system. It is a 40 pin DIP IC. It requires +5V DC power supply for its operations. The 8255 Interfacing the microprocessor/ microcontroller on one side with peripherals on

Bit addresses for I/O – Microcontroller 8051 Microcontroller 8051 contains four I/O ports. They are Port 0, Port 1, Port 2 and Port 3. All ports are 8 bit ports. So totally it contains 32 I/O pins that connects the 8051 to the outside world. Port 0 pins may be served as inputs, outputs or

Assembler and Addressing Mode 8051 Assembly language is the human language most closely tied to machine language. addressing mode 8051 It is usually written in instruction mnemonics. Once the program has been written in mnemonis, it is translated into machine code by a process known as assembly the program. Assembly language programming requires the use

Direct Electronics Supply  These lectures follow the traditional review of direct electronics supply circuits, with emphasis on two- terminal networks and equivalent circuits. The idea is to bring you up to speed for what is to come. The course will get less quantitative as we go along. In fact, you will probably find the course

The principal light sources used for Optical Sources optic communication application are heterojunction-structured semiconductor laser diodes (also referred to as injection laser diodes or ILDs) and light-emitting diodes (LEDs).  A heterojunction consists of two adjoining semiconductor materials with different band-gap energies. These devices are suitable for fiber transmission systems because they have adequate output power

COMPONENTS OF AUTOMATIC CONTROL SYSTEM The basic components of an automatic control system are error detector, Amplifier and Controller, Actuator (power actuator), plant and sensor or Feedback system. The block diagram of an automatic control system The plant is the open loop system whose output is automatically controlled by closed loop system. The combined unit