[DIYbio] Making my own incubator

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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