The system is designed to calculate the energy consumption of an electrical load in units (kWh) and estimate the corresponding electricity cost in rupees based on the duration of usage. The calculated results are displayed instantly, helping users save time and providing a simple method for monitoring the energy consumption of individual electrical devices. An energy audit is a process of analyzing the power consumption of an electrical device and determining the cost incurred during its operation. It helps users evaluate whether a particular device is being used efficiently and economically in domestic or industrial applications. As electricity tariffs continue to increase, monitoring and auditing the energy consumption of individual devices has become increasingly important. The proposed project consists of an instant energy auditing system using a PIC microcontroller. The system calculates the energy consumed by a device and the corresponding cost for a specified period of operation. The user can enter the electricity tariff and the expected operating time of the device through push buttons. Based on the entered parameters and the load power consumption, the PIC microcontroller calculates the estimated energy consumption in units and the associated electricity cost. The results are then displayed instantly, allowing the user to easily monitor and evaluate the energy usage of the connected device.        

Minimum Features:  

• Energy consumption calculation in kWh (units).
• Electricity cost estimation in rupees.
• PIC microcontroller-based operation.
• Tariff input through push buttons.
• Operating time input through push buttons.
• Instant display of calculated energy and cost.
• Simple and user-friendly operation.
• Suitable for domestic and industrial loads.
• Helps in energy auditing of individual electrical devices.
• Reduces manual calculation time and errors.

       

The major building blocks of this project are:

1. Regulated Power Supply.
2. PIC Microcontroller.
3. Push Buttons
4. Digital Energy Meter.
5. Optocoupler.
6. Relay with driver.
7. LCD with driver.
8. Buzzer with driver
9. Crystal
10. LED indicators.

   

Software’s used:    

1. PIC-C compiler for Embedded C programming.
2. PIC kit 2 programmer for dumping code into Micro controller.
3. Express SCH for Circuit design.

       

Regulated Power Supply:                  

Block Diagram:          

video: