[DIYbio] Re: Making my own incubator

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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