Hi,

I know its been discussed before also but my problem is a little different.

I drive about six relays from micro with ULN2003 and 4049 in between micro and relays.

ULN2003 has surge supressor diodes on chip but still when the any of the relays delatches the micro often gets garbage in it.

The worst thing is that external interrupts get actuated. Can't disable ext. ints. because they are required.

Help

Babar