DESIGN AND CONTRUCTION OF MULTIPURPOSE CIRCUIT

INTRODUCTION
A multipurpose circuit board (MCB) is a mechanically supports and electrically connects electronic components using conductive tracks, pads and other features etched from copper sheets laminated onto a non-conductive substrate. Components – capacitors, resistors or active devices are generally soldered on the MCB. Advanced MCBs may contain components embedded in the substrate.
MCBs can be single sided (one copper layer), double sided (two copper layers) or multi-layer (outer and inner layers). Conductors on different layers are connected with vias. Multi-layer PCBs allow for much higher component density.
FR-4 glass epoxy is the primary insulating substrate. A basic building block of the MCB is an FR-4 panel with a thin layer of copper foil laminated to one or both sides. In multi-layer boards multiple layers of material are laminated together.
Multipurpose circuit boards are used in all but the simplest electronic products. Alternatives to MCBs include wire wrap and point-to-point construction. MCBs require the additional design effort to lay out the circuit, but manufacturing and assembly can be automated. Manufacturing circuits with PCBs is cheaper and faster than with other wiring methods as components are mounted and wired with one single part. Furthermore, operator wiring errors are eliminated.

1.1 BACKGROUND OF THE STUDY
Technology is advancing every moment creating smarter devices. Every new device is trying to make activities easier and comfortable S. Khodyachykh, (2006). Life will be awesome while using multi-purpose extension box. The multi-purpose extension box from the mains, the Live wire passes through the fuse and switch and continues to all the other sockets. The Neutral wire passes just passes straight to the other pin in the sockets (in your case, the black wire).

If a tester is lighting up when brought in contact with the Earth terminals, it necessarily means there is a short between Earth and Live terminals somewhere. If you have a multi-meter, set it to ‘buzz’ (the option which lets you check continuity) and go on eliminating places of short. It should be pretty straight forward to find it. Start from the exposed solder points.

Multi-purpose extension box with Single 3 Pin Universal socket and 3 meter cable is used for supplying the power, circular shape universal extension board with cable. The cord can be coiled by turning the face plate. With the multi-purpose extension box you can control devices in your home such as fan, light, fridge, AC… Main feature of the project is its low cost and compactness. With this multi-purpose extension box, we are able to switch on and off remotely any device plugged into it.

1.2 SCOPE OF THE STUDY
The study will cover the qualitative and quantitative analysis that is involved in the design and construction of multipurpose extension box

1.3 OBJECTIVES OF THE STUDY
The present study has been designed to evaluate the construction of multi-purpose extension box. The study has also explain the various materials required in the design and construction of multi-purpose extension box.