But the problem is that i want to do it only using BJTs, please no MOSFETs since i can't find them or i am not comfortable with them.

hi.
OK, do you have any Darlington NPN power transistors.? TIP series
E

 

hi.
OK, do you have any Darlington NPN power transistors.? TIP series
E

No i don't have any please suggest me one and should work on lower power....

 

hi,
You must tell me what power BJT's that you have available.
E

 

hi,
You must tell me what power BJT's that you have available.
E

i can find 2n2222 in my area but its max ic=800mA.
suggest me a NPN BJT that can at least handle 1A current.

 

hi,
Look at this PDF.
May require a small heat sink, depends on the Siren ON period.
E

 

Hello,

You could lookup a transistor in the attached table.

Bertus

 

Hello,

You could lookup a transistor in the attached table.

Bertus

Thank you for this.