I have developed a 89c52 based circuit , basicaly , a sequential timer.
It sequentially turns on two motors for programmed by multipole switches.
I have used two relays to switch on and off the motors . My power supply is simple tranformer/rectifier type.
My problem is that CPU hangs abruptly keeping both the relays on or off(once in a day/two if run continuously.)
Please help me , I am in serious trouble.