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Topic: Arduino DUE does not start until is not pressed Reset button (Read 3499 times) previous topic - next topic


Nov 24, 2013, 07:53 pm Last Edit: Nov 25, 2013, 07:08 pm by K5CZ Reason: 1
After powered up, my Arduino  DUE does nothing. I must to press Reset to start sketch previously uploaded. Power from USB or power from barrel jack does not affect this behavior.

Is this normal? Or this mean, that reset circuit has problem?

PS: reset from USB (via DTR) starts sketch too.


Title states "UNO" but text states "Due". 

I do not own a Due, but all YNO with Optiboot autorun at power-on.

I would expect a Due to autorun.  Else, how would unattended restart work?
Maybe a Due owner will validate.



Nov 25, 2013, 02:30 am Last Edit: Nov 25, 2013, 08:33 am by westfw Reason: 1
If you have an Arduino older than Uno Rev3, you may be suffering from the "reset overshoot" problem described here:
http://forum.arduino.cc/index.php?topic=64256.105  These were especially common in the Uno R2.
The fix is a clamping diode (any general purpose diode) between reset and +5V (cathode on +5V, anode on reset), which you can do like:


Title states "UNO" but text states "Due".

I'm sorry, mistyped. My Arduino Uno R3 starts immediately after power up, Arduino Mega 2560 R3 too, but latest purchased / my new Arduino Due R3 does not start.



Did you solve this problem of "AutoStart" with the Due?

I also have the same problem.




Do you have anything drawing power through the Due?  A display screen?  I always need to push restart after power up because the 7" screen i use draws a lot of power.  I've measured 600 mA through the whole Due/Shield/Screen assembly.  On power the screen illuminates then on reset the sketch runs and the screen template layout appears.

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