11 thoughts on automatic college bell yashveer singh sir could i know that can we program 8051 microprocessor according our collage time 8 periods go in our collage and there is 30 mints break after 4 periods and each period is of 50 mints. Automatic college bell at89s8252 ds1307 this project takes over the task of ringing of the bell in colleges it replaces the manual switching of the bell in the college it has an inbuilt real time clock ds1307 which track over the real time when this time equals to the bell ringing time then the relay for the bell is switched on. 8051 microcontroller based automatic school college bell using timers school bells college bells automatic school college bell using pic microcontrol. Automatic college bell using microcontroller circuit diagram 3d 16f877a 555 8051 microcontroller android arduino arduino uno arm atmega32 atmel avr dc motor dht22 electronics embedded esp8266 google hi tech c iot l293d lcd led matlab microcontroller mikroc mobile motor mplab mplab xc8 pcb pic proteus python raspberry pi samsung sensor . Automatic bell system for school this system uses a power supply block to drive all the circuit components an 8051 microcontroller to control and manage bell timings a real time clock for accurate timing operation a matrix keypad to enter and configure the bell timings and a seven segment display to display the time and information