every time Arduino restart, it's send pulse of 5v to A0. how to prevent it?

hiii guys , my arduino pro mini send pulse of 3.5v for few sec to analog 0, every time it's restart.

how can i prevent it ?

TNX.

That should not happen. It could be something in your code or wiring, neither of which we can see.

Read the how to use the forum sticky to see how to properly post code and some advice on how to get the most from the forum. Following the guidelines will get you better and faster help.

If it’s not an error in your sketch most likely that this pin is just floating. Connect 10K-20K pull down resistor.

groundFungus you were right ... lucky me i'm a programmer ..

tnx ;)