Fire Alarm in 30 Rs

A SIMPLE FIRE ALARM FROM A DIODE FOUND IN OLD RADIO, TV, ELECTRONIC APPLIANCES.

YOU WILL NEED-

1)A DIODE

2)A BUZZER

3)6 - 9 VOLT BATTERY

4) PLY WOOD TO ASSEMBLE

5)SOME WIRES

6)SOLDERING IRON WITH LEAD

HOW TO MAKE-

-ASSEMBLE THE CIRCUIT GIVEN BELOW AND SOLDER ALL THE CONNECTIONS ACCEPT THE LEADS WHICH ARE GOING TO DIODE.

-SELECT THE PLACE WHERE YOU WANT TO FIX TH SENSOR(DIODE).

-CONNECTING THE LEADS OF DIODE IS DONE BY WINDING UP SINGLE CORE STRAND    

 WIRE ON THE BOTH THE ENDS OF DIODE.  

- REMOVE THE INSULATION OF THOSE SINGLE CORE STRAND WIRE WHICH ARE CONNECTED TO THE DIODE, BECAUSE THIS CAN MELT THE INSULATION WHEN THE DIODE IS HEATED UP.

-NOW CONNECT THE WIRES TO THE CIRCUIT.

-IT IS READY TO TEST BUT READ THE PRECAUTIONS BEFORE YOU GET STARTED.

PRECAUTIONS-
-DO NOT TOUCH THE DIODE WHEN THE DIODE IS HEATED UP.
-PLACE THE DIODE FAR AWAY FROM THE CIRCUIT,SOMETIMES THE PLYWOOD WOULD     BURNS.                  
-BE SAFE AND WORK CAREFULLY.

                                                                     CIRCUIT DIAGRAM-