Submitted by
CHANDRA KUMAR. V
GOPINATH. D
MUTHU KRISHNAN. J
PRADHAP KUMAR. T
SENGOTTOVEL. P
VISHNU. V

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1. SYNOPSIS
The objective of this project is to wireless energy transmitter with tariff system through microcontroller. This is a type of data transfer through wireless communication by using microcontroller. This system will be useful for the EB people to transmit the data from the consumer place to EB without going directly to the consumer place. This particular system will transmit the number of units consumed by the consumer as well as the amount has to pay for the month.
1.1 Methodology:
This project is designed by following blocks
 IR transmitter and receiver.
 Microcontroller
 LCD display
 Encoder.
 RF transmitter
 RF receiver
 Decoder.
 PC
2.1 BLOCK DIAGRAM DESCRIPTION :
By using the keyboard, we are fixing the corresponding data before that the IR transmitter and receiver senses the number of rotation of energy meter and it gives to signal conditioning circuit.
This Circuit delivers the output in terms of pulses to the Microcontroller. Number of units consumed is indicated in the display. If the particular data and time is reached, the microcontroller sends the signal to encoder. The encoded signal is then transmitted to RF transmitter.The RF receiver receives the transmitted signal and then it is given to the decoder. The Decoded signal is now transferred to PC. This is wireless type of communication.
4.2 EXPLANATION:
The ac voltage, typically 220V rms, is connected to a transformer, which steps that ac voltage down to the level of the desired dc output. A diode rectifier then provides a full-wave rectified voltage that is initially filtered by a simple capacitor filter to produce a dc voltage. This resulting dc voltage usually has some ripple or ac voltage variation.
A regulator circuit removes the ripples and also remains the same dc value even if the input dc voltage varies, or the load connected to the output dc voltage changes. This voltage regulation is usually obtained using one of the popular voltage regulator IC units.
4.4 WORKING PRINCIPLE
4.4.1 TRANSFORMER:
The potential transformer will step down the power supply voltage (0-230V) to (0-6V) level. Then the secondary of the potential transformer will be connected to the precision rectifier, which is constructed with the help of op–amp. The advantages of using precision rectifier are it will give peak voltage output as DC, rest of the circuits will give only RMS output.
4.4.2 BRIDGE RECTIFIER:
When four diodes are connected as shown in figure, the circuit is called as bridge rectifier. The input to the circuit is applied to the diagonally opposite corners of the network, and the output is taken from the remaining two corners. Let us assume that the transformer is working properly and there is a positive potential, at point A and a negative potential at point B. the positive potential at point A will forward bias D3 and reverse bias D4.
The negative potential at point B will forward bias D1 and reverse D2. At this time D3 and D1 are forward biased and will allow current flow to pass through them; D4 and D2 are reverse biased and will block current flow.The path for current flow is from point B through D1, up through RL, through D3, through the secondary of the transformer back to point B. this path is indicated by the solid arrows. Waveforms (1) and (2) can be observed across D1 and D3.One-half cycle later the polarity across the secondary of the transformer reverse, forward biasing D2 and D4 and reverse biasing D1 and D3. Current flow will now be from point A through D4, up through RL, through D2, through the secondary of T1, and back to point A. This path is indicated by the broken arrows. Waveforms (3) and (4) can be observed across D2 and D4. The current flow through RL is always in the same direction. In flowing through RL this current develops a voltage corresponding to that shown waveform (5). Since current flows through the load (RL) during both half cycles of the applied voltage, this bridge rectifier is a full-wave rectifier.