[DIYbio] Re: Making my own incubator

Yes I have.

But the heating elements may burn the styrofoam (polystyrene).
Although they have just a bit more than 60°C I want to be sure noone
is hurt ;)

My idea is to heat the cup up using a hair-dryer before using it... So
it has already 30°C heat and the circuit doesn't need to heat so much
up (20->30°C takes several (very many!) minutes!!)

On 5 Feb., 08:00, CodonAUG <elsbe...@gmail.com> wrote:
> Have you thought about using a styrofoam cooler as the chamber instead
> of a cup?
>
> On Feb 4, 4:12 am, Mega <masterstorm...@gmail.com> wrote:
>
>
>
>
>
>
>
> > Thank you.... I have already written the code (I modified the code I
> > used for measuring the temperature many months ago)
>
> > I could post some pictures here if there is an online storage where to
> > put them in...
>
> > Pulse-with modulation would work well with transistors/MOSFETs  but as
> > I have only electronical transistors (maybe can't stand the amperage)
> > at home I'm using a relais.
>
> > Yeah and the temperature I'm measuring is displayed by two LEDs :
> > First LED shows 'tens', second one 'ones'. So if it was 34 °C (Komma
> > is not displayed) it would be -> 3times first led blinking , 4 times
> > second led.
> > (To avoid using LCD which would mean you'd need a bigger chip like
> > ATmega8)
>
> > On 3 Feb., 23:40, Cathal Garvey <cathalgar...@gmail.com> wrote:
>
> > > I love this idea! It's really minimalist and simple. A cool hack. :)
>
> > > I have code for a water bath that uses an arduino and an LM35; you might
> > > be able to re-use some of that code if you like?
>
> > > In particular, there's an LM35 reading function and some basic
> > > temperature controls, and some failsafe code built in.
>
> > > It's on github here:https://github.com/cathalgarvey/KettleKontroller
>
> > > And it's attached. Currently set to 55C for the G.stearothermophilus I'm
> > > trying to culture, you'll have to change that if you want to use it as-is.
>
> > > Also if you're using it as-is, you'll need to play with "HeatPulseDur"
> > > and "RestPulseDur": they cover how long to turn the heater coil on and
> > > off during heating. Kind of like coarse pulse-width-modulation; you can
> > > use different settings to get different rates of heating out of any
> > > given setup.
>
> > > Right now, it's pin A0 for LM35 input (with the LM35 on +5V), and heater
> > > control is on pin 13 (In my case, controlling a relay which turns a
> > > kettle on and off)
>
> > > On 03/02/12 19:09, Mega 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.
>
> > > --www.indiebiotech.com
> > > twitter.com/onetruecathal
> > > joindiaspora.com/u/cathalgarvey
> > > PGP Public Key:http://bit.ly/CathalGKey
>
> > >  BathProto3
> > > 6KAnzeigenHerunterladen

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