--- In "Gonzalo A. de la Vega"
<> wrote:
>
> Depending on the thermal conductivity and thermal capacity of what you
> are controlling, and the precision you need, may only need a
> thyristor: usually the time constants of temperature controlled
> systems is quiet large (like tens of seconds), so just turning the
> heater on and off is enough. If this is the case you won't need a PWM
> output either, just binary.
> Note that by saying a thysritor I mean any on-off device: triac, or
> relay too. A thyristor is rectifying, so you'll get at most 1/2 the
> power unless you use two of them.
The accuracy isn't really a problem; if this swings 2-3 degrees either
way it's no big deal. Even 5 degrees would be OK.
The dimmer thing is aesthetic more than anything else. This
particular heater is bright, so I'm trying to eliminate this bright,
150W bulb from flashing on and off in a most annoying manner. :-)
I could go to a ceramic heater, but they're much more expensive, and
then I'd need a light source anyway, so I'm trying to dim the heater bulb.
Thanks,
--Yan
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