ronydc
Full Member level 3
dear friends,
i hvae made a simple project with 89c51 and i am in trouble.
the project is --> 8 relays, 8 switches. when one wsitch is pressed, one relay becoms on and all others off.
so simple.
but the problem is --> at the start, when i firstly ON the supply, ( +5v from a regulated supply), all the LEDS blink once and goes off. after that the program works finely.
my problem is, how to remove this blinking of all the leds at the start..? is this a power supply problem..? or something needs to be dont with at the reset pin of the mcu..?( this tyme i am providing the "power on reset" to pin 9).
what modifications or additions i need to do to any microcontroller ckt to avoid this starting problem....
please advise.. friends.
-rony.
i hvae made a simple project with 89c51 and i am in trouble.
the project is --> 8 relays, 8 switches. when one wsitch is pressed, one relay becoms on and all others off.
so simple.
but the problem is --> at the start, when i firstly ON the supply, ( +5v from a regulated supply), all the LEDS blink once and goes off. after that the program works finely.
my problem is, how to remove this blinking of all the leds at the start..? is this a power supply problem..? or something needs to be dont with at the reset pin of the mcu..?( this tyme i am providing the "power on reset" to pin 9).
what modifications or additions i need to do to any microcontroller ckt to avoid this starting problem....
please advise.. friends.
-rony.