Electronic house
Tuesday, November 4th, 2008Touch sensitive burglar alarm for internal security
This simple circuit when connected to a metal locker or cupboard generates an alarm when touched by an undesired entity.
The transistor gets saturated by just touching its base. Here is a simple, low cast touch switch with alarm based on this idea. The 50 Hz hum present in our body is the key to this circuit. BC 549 transistor has been chosen for this circuit. The circuit is basically a burglar alarm with timer. Timer circuit is a monostable multivibrator. Initially voltage at pin 2 of IC 1 is low.
If the sensor, which is the base of the transistor T1 is touched by the finger (even the slightest, touch will do) transistor T1 is saturated. Now the voltage at pin 2 of IC 1 is greater than 1/3 Vcc. As a result IC 1 gets a trigger pulse at its trigger input pin 2. Therefore its out goes high for a predetermined time period. The period can be adjusted by varying the value of resistor R1 or capacitor C1 as T=1.1*R1*C1 sec.
The siren circuit is build around IC 2 (UM 3561). Since the output of IC 1 is high, the IC 2 gets power supply. The output from IC 2 is amplified by transistor to drive an 8-ohm, 500mw load-speaker.
Circuit diagram of Touch sensitive burglar alarm
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Dear Sir,
I am so glad that I come across your site as I was looking for similar projects. It is very informative.
Please let me know if you have the layout and pcb details and if possible please mail the same to me to my above email. I will be ever grateful to you for that.
Thanks and warm regards,
Really your site is very informative.Please let me know if you have the layout and pcb details and if possible please mail the same to me to my above email. I will be ever grateful to you for that.
Thanks
Really your site is very informative.I want to get the block diagram of this project with more details
Thanks
Dear Sir,
I am so glad that I come across your site as I was looking for similar projects. It is very informative.
Please let me know if you have the layout and pcb details and if possible please mail the same to me to my above email. I will be ever grateful to you for that.
Thanks and warm regards,
hello Sir,
great job.am impressed.Really your site is very informative.Please let me know if you have the layout and pcb details and if possible please mail the same to me to my above email.
Really your site is very informative.Please let me know if you have the layout and pcb details and if possible please mail the same to me to my above email. I will be ever grateful to you for that.
Thanks
please send me information about Touch sensitive burglar alarm for internal security.I liked this topic alot
hi! please send me parts list off all equipments..
hii
i m intersted in this project can u send me the necessary details…
hello
am a final year student and i wish to do this as my project can u pls send me the cost of this and also related circuits… thank u
Sir I am interested in this project.
Will you please send me all details of this project on my email id: a_dark_knight43@yahoo.com.
And please tell me the total cost of this project:i will wait for your response sir.plezzzz
hello sir
the project of electronic house is quite interesting.can u please send me the abstract of this project.
thanku
dear sir,
i want to take it my final year project. please said to me that how much cost will be required for implement it. and if possible please send the lay out and details circuit diagram of this project .my email id is ahmripon@gmail.com
I AM SO SUCH INTRESTED ON THE ABOVE PROJECT THAT IS ELECTRONIC HOUSE AND I WANT DETAIL OF IT.SO PLEASE SEND ME ITS DETAIL.
Hi sir! Really ur project is very excellent. I am interested in doing this as my project work. So plz…. Send me more details about ur electronic house.
hi,i want to have the material list for this project and will you please send the complete details of this project including the PCB layout and circuit diagram for power supply.
My mail id:munawermunnu@gmail.com
sir,i’m interested in doing tis as my project work,so plz…………….
send me more details adout ur electronic house and circuit diagram than total cost of this projuct.pcb layout.i will wait for ur mail so plzzzzzzzzz respn me sir.thank you sir
sir i m a third year ec student… i m searching topics for my mini project. . it should not include microcontrollers … can u please mail me some topics…its urgent …
this is awesome project.please send me all pcb lay outs,circuit diagrams,lay out of circuits on house.functionong of remote controlled equipments.pls send me the full details about this ………shahfahad_3@yahoo.com
hi im final year student of EC… and im really like this project. so plz send me necessary data to built this projects… so im able to make this projects as my final year….
sir, i m 3rd yr entc student
i am interested in electronics house project. bt
Can I make this as mini project? Please give the details. or mail me some another topics for my mini project.
I’m impressed with this project so please send me all details of this project immediately.
Thanks
sir,i like E.H. send me more details adout ur electronic house and circuit diagram than total cost of this projuct.pcb layout.i will wait for ur mail so plzzzzzzzzz respn me sir.thank you sir
hi
i am intrested in electronic house
please send me desired info about it
helloo sir i m interested in this but i want minor project in the basis of this so please send me full detail in the short time period because i want to show this in my tec-fest there is no much time left more this fest so plz send
a nice interesting project………………
Sir, I’m interesting about project… Can you send more details regarding to this. I would like to implement this house as my final project. Plz as soon as possible send me the complete circuit diagram and other regarding details…
Hello Sir, I am interested in electronics house project.
Can I make this as mini project? Please give the details.
Hello
I am interested in electronics house project.
Can I make this as mini project? Please give the details.
and this project is iteresting http://www.youtube.com/watch?feature=player_embedded&v=Tj63nZ5hsBw
can you help me,to realise that?
pls send me program for this project. pls pls…
durgeshtiwary.1993@yahoo.com