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Project Name: Interfacing LCD display controller. Objective of Project: Programming the AT89C2051 microcontroller to show the sentence “I LOVE YOU” on 16x2 line LCD display. Circuit Diagram: List of components: SL Name and Description Quantity 1 MCU 89C2051 1 2 LED 2 3 Resistance 1K Ohm 4 4 Capacitors 30pf (10 uf 50Volt(1),100uf 50Volt(1)) 2 5 Crystal Q11.059A1 1 6 Voltage regulator 7805 1 7 Bread board 2 8 Connecting wires 9 Battery 9 Volt 1 10 16*2 LCD display 1 Printout of Program: ; P1.0-P1.7=D0-D7, P3.0=RS, P3.1=R/W, P3.2=E ORG 0 MOV DPTR,#MYCOM C1: CLR A MOVC A,@A+DPTR ACALL COMNWRT           ;call command subroutine ACALL DELAY   

Project Name: Automatic Water Pump Controller (ON/OFF). Objective of Project: Automatic Water Pump ON/OFF using P3 and P1 of AT89C2051 Microcontroller. Circuit Diagram: List of components: SL Name and Description Quantity 1 MCU 89C2051 1 2 LED 2 3 Resistance 1K Ohm 4 4 Capacitors 30pf (10 uf 50Volt(1),100uf 50Volt(1)) 2 5 Crystal Q11.059A1 1 6 Voltage regulator 7805 1 7 Bread board 2 8 Connecting wires 9 Battery 9 Volt 1 10 Display 3 11 Transistor 3 12 Water - Flow Chart of Program: Printout of Program: Brief Description of Program: We declare the bit P3.0 as Lo and bit P3.1 as Hi. Then we define the code for Pump ON and Display O. And define the code for Pump OFF and Display F. We send FF to P3 to