Max Current for Digital Pins: Is it limited by the board?

[LarryD]

@LarryD

Okay, .84v ÷ .00369 ≈ 241Ω

.84v(220) + 1.89v(LED) = 2.78v
3.3v - 2.78 = .52 across the o/p pin still high

Re post.

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Brown Brown Black Black Brown (1%) is 110 Ω

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Is the pin .52v to GND .