can arduino on output mode sink current?

Question

I have a arduino set below:

pinMode(1,OUTPUT);
digitalWrite(1,LOW);

Now, I am expecting 1.2mA current flow through the pin that is set as output. Is that accepted? If so, what it the max current a pin can sink?

The current comes from a pul up resistor on the line

note: I can't protect it with a diode.

score 6 · Accepted Answer · answered Nov 08 '17 at 22:07

6

Ok, I just found it.

from the arduno docs:

Atmega pins set aa output can source (provide positive current) or sink (provide negative current) up to 40 mA (milliamps) of current to other devices/circuits.

answered Nov 08 '17 at 22:07

Ryan B.

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score 2 · Answer 2 · answered Nov 08 '17 at 23:13

2

Yes it can. This blog post of mine will help to explain it.

In short:

It’s all so simple now, isn’t it? The output pin is just like a switch that either connects it to 5V or to ground.

answered Nov 08 '17 at 23:13

Majenko

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score 1 · Answer 3 · answered Nov 08 '17 at 22:14

1

can arduino on output mode sink current?

yes.

from the arduno docs:

the datasheet for the particular device is the best place for that answer.

answered Nov 08 '17 at 22:14

dannyf

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can arduino on output mode sink current?

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