MICROCONTROLLER GOIN OFF AFTER SOME MINUTES

[dadamuyiwa]

Hi guyz, I am using a microcontroller in a particular circuit microwave receiver board as a voltage source to power my relay swicth but d controller is switching off on its own after every 27secs . Pls, does anybody know wht culd b d problem?

 

[zx_sa]

If the timing is always exactly 27 seconds, then there is one likely cause: the watchdog. You do not say which microcontroller you're using, but check if it's got a watchdog and confirm that the watchdog is doing what you expect it to do.

Another option, less likely but also possible, is some demo versions of development software builds a time limit into any source code that you compile. So you can test anything you like, but it will set the watchdog to reset the CPU after a certain time. This prevents you from creating a commercial product with demo software tools.

 

[madicalphy]

and if you want to use a mocrocontroller from 8051 family, here you will find example and reference projects of micro controllers.
**broken link removed**

 

[dadamuyiwa]

Thanks guyz.