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Type: Posts; User: PaulStoffregen

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  1. Replies
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    I wouldn't worry about only a few ohms difference.

    I wouldn't worry about only a few ohms difference.
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    Ok, I just tested several random LEDs, and the...

    Ok, I just tested several random LEDs, and the RGB LED PJRC sells, using pins 9 and 12 and a 0.961 ohm resistor.

    Here are the results:



    1ohm current led vcc pin9 ...
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    11,445

    There's generally 2 ways to think about these...

    There's generally 2 ways to think about these things: physics and datasheet specs. In this message, I'll talk about the physics....

    Most chips with digital outputs have a pair of transistors that...
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    11,445

    The trouble with connecting a LED without any...

    The trouble with connecting a LED without any series resistor is the actual current flowing through the LED, wires and transistors can be rather unpredictable. It's likely the current could be too...
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