Simple Alarm [CCS C Compiler]

[armghan11]

I want a simple alarm circuit that turn on when receive an interrupt from another micro controller.....

 

[alexxx]

Hi!

Turn on what? A siren? Drive a relay? An open collector output? What would that be?
Which MCU are you using?
And what kind of interrupt? Level or edge?

Please provide some more details about project scenario, a schematic would be even better. :wink:

 

[armghan11]

Hi!

Turn on what? A siren? Drive a relay? An open collector output? What would that be?
Which MCU are you using?
And what kind of interrupt? Level or edge?

Please provide some more details about project scenario, a schematic would be even better. :wink:

I am developing a non intrusive load monitoring system that will monitor all the load activities in a building... the system will display all the appliances running and also record there timings... if any appliance is on for too long it will turn on a Alarm! i am using pic16f877a controller... i want my controller to generate a level interrupt that will go to 555timer and the siren will turn on.

 

[alexxx]

i am using pic16f877a controller... i want my controller to generate a level interrupt that will go to 555timer and the siren will turn on.

Sorry, I don't use pic to further help you with the code, but you don't need to make the circuit more expensive with the use of 555. PIC timers are already there, you could use them as well.
As for hardware, you should provide information on the siren (like operating voltage for example) to get help. If datasheet is available it would be useful for other members if you posted it.