On Mon, 08 Feb 2010 20:48:26 +0100, "Dario Greggio" said:

> This is a point indeed. I was planning on using a transistor as well, 
> coupled to a tiny SOT23 such as MCP9800. I can't actually think of 
> anything "faster" than a transistor to heat up, I mean... a lamp or a 
> resistor sounds slower to me...

A hot wire exposed directly to the air is pretty responsive. The wire
material is also probably a relatively poor conductor of heat, so the
temperature is not heavily influenced by the connecting wire. As opposed
to a transistor, encased in plastic, with copper leadframe and
conductors muddling the accuracy by bleeding heat into the thermally
isolated parts of the device.

Cheerful regards,

Bob

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