Hi! I have this project of a "phone". It consists of: Arduino DUE, 4x4 Keypad, SD Data shield, a phone receiver detect (on/off) an Amp and a Speaker. I am using a 9V 1A power source to power everything. On the first turn on, if the board is cold, the Arduino won't run the program (I can see the l…

It seems my Arduino DUE was faulty... New DUE - no problems.

DUE "phone" not turning on when cold

anon77129126 September 20, 2021, 3:26pm 2

Some electronics have a minimum operating temperature.

Please specify how cold "cold" is.

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