8051 Microcontroller | Pin Diagram & Projects

8051 microcontroller is an 8 bit microcontroller designed by Intel in the year 1981. It was known as system on a chip as it had 40 DIP pins, 128 bytes of RAM, 4K byte of on-chip ROM, two timers, one serial port, and 4 ports (8-bit wide), all on a single chip. It includes four parallel 8-bit ports, that can be programmed or addressed per need. An onboard 12 Mhz on-chip crystal oscillator is included in the microcontroller.

8051 Pin Diagram

  • 8051 Microcontroller is a 40 pin PDIP (Plastic Dual Inline Package) Controller
  • 4 Ports and 40 Pins are used to manage all I/O operations.
  • I/O operation port has 32 pins reserved.
  • The other 8 pins are designated as Vcc, GND, XTAL1, XTAL2, RST, EA, ALE/PROG, PSEN.
  • Please refer the video for detailed explanation.

8051 Microcontroller Projects

Vehicle Sensing Streetlight Using 8051
8051 vehicle sensing streetlight
The project aims at saving energy by detecting the vehicle movement on highways and switching on the block of street light ahead of it and simultaneously switching off the trailing lights.
Hand Motion Robotic Vehicle Using 8051
Hand Motion Robotic vehicle 8051
The person just has to move his hand in order to move the vehicle in forward, backward, left or right direction. So the user does not have to press any buttons.
Password Circuit Breaker Using 8051
8051 password circuit breaker
A circuit breaker is used along with a keypad for lineman safety while working. The line man can enter the password to switch OFF the circuit.
8051 Bomb Disposal Robot
Military Bomb disposal robot
This system makes use of robotic arm as well as robotic vehicle which helps not only to enter an area involving high risk but also to pick whatever object it wants to.
8051 Motion Based Door Opener
8051 Motion Based Door Opener
Motion Based Automatic Door Opener mainly aims in opening the doors without any manual help. It is difficult to manually open the door always in places like hotels, malls, office, supermarkets etc.
DTMF & RF DUal Control Robot
8051 password circuit breaker
Here we propose a “8051 Dual Controller Based Robot”, which is an advanced type of robotic vehicle which can be controlled by Dual Tone Multi Frequency Based controller (DTMF), Radio Frequency (RF).

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