Auto power supply control from 4 different sources to ensure no power break

Description

Auto supply switching is basically the selection of supply from multiple available power sources automatically by using the microcontroller concept that is to check the availability of the source and switching to that available source to ensure uninterrupted power supply to load. In the case of the electrical appliance control using automation causes more safety.

Auto supply switching kit is a prototype for the same which is an auto change to another source when the main supply fails without human interaction in this system we are designing an embedded circuit to control and ensure auto supply switching. In case all 4 phases are available, then the switching will be in the default phase. Four relays are there to control the switching. As it is not feasible to provide all 4 different sources of supply, one source with alternate switches is provided to get the same function.

In this project, we are having Auto power supply4 switches kit which we consider as 4 different sources of supply. When we press any of the switches it shows the absence of that particular source that is connected to the microcontroller as input signals. Here we are using an 8051 family microcontroller. The output of the microcontroller is given to the ULN2803 which acts as a relay driver. The current phase working is displayed on LCD also.