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Topic: Non Linear Fading (Read 1 time) previous topic - next topic

Gav

Are you talking about a current limiting resistor from arduino to the signal pin of the MOSFET? If so, why? I thought the input resistance was huge.
If you mean on the output, I'm actually running some LED strips which are already set up to take 12V raw, so the MOSFET just switches the power supply directly to the strips. Is that all ok?

Also, am i right in saying that the MOSFET is either on or off? if i put 1V on the input pin (they are logic level MOSFET's by the way) they will be off, right?

Grumpy_Mike

I mean the output.

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set up to take 12V raw,


So if you feed them with 10V they will be dimmer.

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Also, am i right in saying that the MOSFET is either on or off?


Not quite, a FET has a threshold voltage but there is also a liner region that can half turn a FET on. Even with so called logic FETs. If you operate the FET in this mode it will have a large current down it with a largish voltage across it and you will exceed the power dissipation of the FET.

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