[DIYbio] Re: Making my own incubator

The air is heated, some (few) centimeters above is the petri dish.

There is a 'lattice' (I hope this is the correct english word) that
keeps the petri dish away from the bottom of the cup where the
resistors are, but lets the hot air go through.

The temperature sensor is not near the ressistances (64°C) but above
the petri dish to get somewhat accurate 35°C.

On 3 Feb., 20:26, leaking pen <itsat...@gmail.com> wrote:
> are you heating with the elements directly in your culture, or are you
> heating a water bath?
>
> how far from the elements is the temp sensor?
>
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> On Fri, Feb 3, 2012 at 12:09 PM, Mega <masterstorm...@gmail.com> wrote:
> > Hey,
>
> > As I need someting to heat my e.coli cells above 30 degrees Celsius to
> > make them grow exponentially,   I'm building my own heater.
>
> > It's made of a very big christmas coffe cup  (some 15cm in diameter),
> > controlled by an attiny 13 and lm335 (temperature sensor).
>
> > It's heated by 6 Ohm resisstances (3 parallel -> 3 of parallels in
> > serial)
>
> > It's powered 3,7Volts, 900 mA. Resistances heat up to ~ 64 °C. When
> > sensor reaches 35°C it will stop heating.
>
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