Arduino mini: setup() and loop() does not run while battery powered

Development Tools IDE 1.x
1

Hi,

I got a problem with my arduino mini 04. When I power the board with batteries trough the +9v pin and gnd, the setup or loop does not run. It does not matter how many amps or what voltage I give it there. If I power it trough a voltage regulator to the +5v pin, it works fine.

I have a led connected to pin 13, and that blinks on startup, but nothing more. I have tried different codes to test, but no result, still a problem.

So, I think it is an hardware problem, maybe a voltage regulator on the board or something, but I really don't know yet. So I hope you guys can help me out. :slight_smile:

Regards,
The Crusher

2

With your 9V connected, can you put a multimeter across pins 2 & 6 on the ICSP header and measure a solid 5V?

3

Where is the ICSP header on the mini?

4

Ah, you don't have one.

Ok, when you connect 9V and Gnd, do you measure between 5V pin and Gnd and see if the onboard regulator is working?

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5

Hi, sorry for my late reply.

When a 9V battery is connected, I mesuere 3,78V between +5V and GND pins.