Sounds good! let us know how it works.
On Fri, Feb 3, 2012 at 1:04 PM, Mega <masterstorm123@gmail.com> wrote:
> 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?
>>
>>
>>
>>
>>
>>
>>
>> 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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