[SOLVED] High-theft alarm circuit

[mo2_star]

Hello to all friends
i need a alarm circuit with very high voice
i want to use it in a Theft alarm for a store .

ThanKs.

 

[tpetar]

Hello to all friends
i need a alarm circuit with very high voice
i want to use it in a Theft alarm for a store .

ThanKs.

What is "high voice" ? You mean very loud ? or you want to break glass with high tones ?

For voice you need specialized IC which can store recorded voice. Good amplifier and good speakers will be responsible for volume.

 

[captain251731]

you should use motorized siren from KHERAJ SIRENS and operate it with a relay.
these sirens are available in the range 2km, to 10 km. with very loud sound

Sirens - Kheraj Electrical Industries
**broken link removed**

 

[mo2_star]

yes my mean is very loud . I am sorry
Should be enough to neighbors can hear it .

- - - Updated - - -

you should use motorized siren from KHERAJ SIRENS and operate it with a relay.
these sirens are available in the range 2km, to 10 km. with very loud sound

Sirens - Kheraj Electrical Industries
**broken link removed**

I can't use this because i can't find it in my country and Because we're in an economic boycott

 

[neddie]

You may need to be a little more specific about your requirements if you want any helpful replies. Do you want PIR , or is a door switch
/magnetic good enough. Are you going to build it yourself , or are you happy to buy?
Here are some starters:
https://www.kitronik.co.uk/products/project-kits/ic-based-kits/alarm-project-kit/
https://electroschematics.com/8425/led-security-light-with-pir-motion-sensor/
**broken link removed**

There are a ton of schematics out there for alarms. For a loud siren I'd use a piezo electric siren(sound bomb) , about as loud
as you get for a fairly cheap price , and they don't need a big power supply to get working.
Cheers
Neddie.

 

[tpetar]

yes my mean is very loud . I am sorry
Should be enough to neighbors can hear it .

I can't use this because i can't find it in my country and Because we're in an economic boycott

You can use compressed air trumpete for car, and beleive me I have this earlier, this weakup deads from graves. I remove this from car, because this is very dangerous for usage in city traffic. You need only to supply 12V to compressor and to switch button :

 

[mo2_star]

ThaNks my friends.
If I design a circuit alarm with a IC 555 and then I output it to a power amplifier
Can I get a loud sound output of the amplifier?

 

[tpetar]

Yes of course. I am quite convinced that your neighbors will be delighted.

;-)