17-05-2012, 02:51 PM
ENERGY SAVER WITH PERSON IN/OUT COUNTER
Energy Saver with Person In- out counter.docx (Size: 4.68 MB / Downloads: 87)
INTRODUCTION
Objective:
The objective of this project is to save the energy according to the number of persons in the room. For an example let us consider the auditorium. We save the energy depends upon the number of audience in the auditorium.
Scope:
This project makes the automatic auditorium. The fans & light in the auditorium are controlled depends upon the number of audience present in auditorium.
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.
IC voltage regulators:
Voltage regulators comprise a class of widely used ICs. Regulator IC units contain the circuitry for reference source, comparator amplifier, control device, and overload protection all in a single IC. IC units provide regulation of either a fixed positive voltage, a fixed negative voltage, or an adjustably set voltage. The regulators can be selected for operation with load currents from hundreds of milli amperes to tens of amperes, corresponding to power ratings from milli watts to tens of watts.
P.C.B FABRICATION
The materials required for the preparation of printed circuit board are:
1. Copper cladded sheet
2. Tracing paper, Indian ink pen, carbon sheet etc.,
3. Paint and nail polish (or) even P.C.B ink and a small painting brush.
4. Tray, Ferrichloride solution, few drops of dilute hydrochloric acid (or) sulphuric acid.
5. Thinner solution (Petrol, Kerosene (or) Turpentine)
6. Small cotton piece
7. Flat bottom disc, enameled inside
8. Hacksaw with blade and file.