Automatic Power Grid Controller

Automation of systems has become the demand of the day. Newer technology has made everything automatic and self repairable. In fact most of the developed systems are impossible to be controlled by human beings. There are many advantages of automation, first and most common human errors are eliminated, speed of operation becomes very fast and most advantageous is that the cost gets reduced. In automatic power grid power grid and different units are controlled on the basis of time.

Serial com in PC via USB port to control different relays will be used. The interfacing is based on UART standard. The UART port is found in microcontrollers but unfortunately it is not there in personal computers. Hence we have used a USB to UART converter to convert the USB data into UART and this way the interfacing is done between computer and microcontroller

. To control the devices, we a relay driver (here ULN2803) is used. For the sake of simplicity, we will control only four relays. It can be extended according to the requirements. Controlling variable is time. In the duration of 24 hours, we will allot different time slots to each unit. On proper time, the relays will be activated automatically and corresponding unit will get activated.

• Dimensions (cm) LxWxH: 30 x 30 X 15
• Weight (kg): 0.9