RF based tsunami detection and remote alert system with 60dB siren

sir, i need an abstract of this topic, s i kindly requst you to give me the abstract
thanking you,
Megha maria ....etc

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AUTOMATED ALARM CIRCUITS
ACKOWLEDGEMENT
Through perseverance and enthusiasm combined with effort in the right direction can bring forth the thing called success but the realization of the harsh reality that the path towards success is full of myriads, temptations, impediments and pitfalls often proves to be disheartening in such situation, it is the able guidance of knowledgeable persons that steers one through difficulties and help her achieve success.

We are highly obliged to express our deep sense of great gratitud ....etc

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1. Name the district where most number of Railway station in Kerala?
(A) Ernakulam(B)Palakad
(C ) Thrissur(D)Thiruvanathapuram

2.In which district is 'Ponmudy dam’ situated?
(A) Alapuzha(B)Idukki
(C ) Pathanamthitta(D).Kollam

3.Which Road is the first Rubberised road in Kerala?
(A) Kottayam-Kumili(B)Kottayam -Erumelly
(C ) Thiruvananthapuram-Kanyakumari(D)Edappilly-Palakkad

4.The first floating ATM in India is established by SBT at:
(A) Kochi(B)Alapuzha
(C ) Quilon(D)Thiruvananthapuram

5.Which Prime Mi ....etc

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Two alarm circuits are presented here. One produces bird-chirping sound and the other British police siren tone. Fig. 1 shows the circuit of the birdchirping- sound alarm unit along with the circuit of the control unit. Fig. 2 shows the circuit of only the British police siren tone generator, which has
to be integrated with the control circuit portion of Fig. 1 at points A and B to complete the circuit diagram of automated alarm

http://ziddudownload/5196571/AUTOMATEDALARMCIRCUITS_1.pdf.html ....etc

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 Hi amchitra  i would like to get details on report on police siren using timer 555 details in pdf and ppt ..My friend Justin said report on police siren using timer 555 details in pdf and ppt will be available here and now i am living at ......... and i last studied in the college/school ......... and now am doing ....i need help on ......etc ....etc

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169/2015
1.Today is Monday. After 54 days it will be :
(A)Tuesday
(B)Thursday
(C )Friday
(D)Saturday

2.In a certain code SCHOOL is written as LPPIDS. How is COMPUTER written in the same code ?
(A) RFVUPNPC 
(B) RFUVQNPC 
(C ) KCZFXMYA 
(D) DPNQVSFT

3.Look at the Series : 26, 25, 27, 26, 28, 27 — What number should come next 
(A)26
(B)27
(C )28
(D)29

4.Choose the odd one : 43, 53, 63, 73, 83.
(A)73
(B)63
(C )53
(D)43

5.Choose the word which best expresses the meaning of the given word : WAR ....etc

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1.The HCF and LCM of two numbers are 12 and 216 respectively. If one of number is 108, find the other number:
(A).36
(C )24

2.Which one of the following is a prime number?
(A)2(B)6
(C) 9.(D)1

3.John makes a profit of 12% by selling the article for Rs. 448. Calculate the cost price.
(A)100(B)200
(C )300(D)400
(B) 48 (D) 9

4.Find the value of‘p’ for which 3, 5, p+5, 25 are in proportion :
(A) 15(B) 20
(C ) 10(D) 30

5.‘A’ can complete a piece of work in 10 days. ‘B’ can complete the same piece of ....etc

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ELECTRONIC SIREN

The 741 is a versatile device and it can be used in the design of a wide variety of sound-effects generators. This circuit produces a siren. The siren can be used in conjuction with other circuits. The siren can be used as the alarm output of a home or automobile security system. Before discussing the circuit operation, let us see the description and working of 741 IC. An operational amplifier, often referred to as an Op Amp, is a very high gain & high performance amplifier ....etc

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HOW TO WRITE A REPORT ON AUTOMATED ALARM CIRCUITS ....etc

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i want project report on police siren In my project there is 2IC 555, no transiistor , 4 resister. so please give it. ....etc

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