int0 problem

Projects General Guidance
1

Hello all,

i have a little problem and i surely need some help here.

i'm counting 1Hz pulses through int.0 (RX/D0 pin) using an arduino uno R3, for a few weeks the project works fine... but due a misconnection of a potentiometer reading from A0, the voltage of the all system went down when i put the minimum resistance at the potentiometer. after this the arduino uno starts to show a very rare behavior, when i try to read that 1Hz pulse through the D0 pin, it reads nothing but, i can load the blink sketch for example.

i put a led/resistor in the D3 pin and try the following: i switch to int.1 (D3) and the voltage simply drops to zero. also i have the error: "avrdude: stk500_getsync(): not in sync: resp=0x00" whenever i try to program the arduino when the "1Hz" pulse running through the D0 pin. i try to burn the bootloader again using the methods on the official site, but nothing seems work. also i can't use any kind of shield at all (i'm using uSD shield and GSM shield).

do you have any clue about this. regards

2

First things first. User interrupt 0 is 'attached' (wired to) to arduino digital pin D2 and interrupt 1 to D3 as per the reference:

http://arduino.cc/en/Reference/AttachInterrupt

3

Thank you Retrofly,

i managed to solve the problem. was the misconnection of the int.0 and a low level voltage in other stage of my project.

thanks a lot