This is an automatic quiz buzzer system in which if more than one team presses the buzzer, the accurate delay time is taken into account and the number is displayed. Here is the simple circuit diagram ...

Fig-1: 8051 Microcontroller LCD Interface (Schematic Diagram). The figure above shows the circuit schematic for interfacing the **16x2 LCD** with the **AT89C51 Microcontroller**. It includes essential ...

The AT89C51 microcontroller used in this project is a low-power high-performance cmos 8- bit microcomputer with 4k bytes of flash programmable and erasable read only memory (perom). The device is ...

This is used for detecting the pulse when the voltage is zero. Finally, the detected pulse from ‘C’ is fed to the microcontroller of the control section. Fig.2: Circuit diagram of phase angle ...