alarm

is anyone tell me the circuit of alarm. i want in my project that the alarm ring first time when i switch it on then after 10 sec delay the alarm ring again.please help me.

u can use the transistor logic to enable & disable the alarm by programming the time required to you check the logics of PNP & NPN will help you a lot

Probably the best way to do this is to use a CMOS 4060 and feed the Q14 output into the Trigger pin of a 555 in one-shot mode. Set the duration of the one-shot 555 to however long you want the alarm to sound. Use the output of the one-shot to run the alarm (through whatever driving circuit is required--though a 555 can drive up to about 100ma), or you could make an alarm with another 555 by running the output of the one-shot to the Reset pin and once again configure this 555 in astable mode with whatever frequency you want the alarm to be at.

Depending on how precise that 10 seconds needs to be (you gave very little criteria), will determine how you configure the oscillator that comes with the 4060. The datasheet has circuits: "CD4060(CD4060)":http://www.alldatasheet.com/datasheet-pdf/pdf/26880/TI/CD4060.html

i m adding the 10sec alarm as u wished.........so plz view it n my post.....