Terrarium heating

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Hello All,

I am also fairly new to everything called microcontroller but I think it is the
best sollution for my heating problem in my terrarium.

I would like to know if it is possible to drive heat and moisture sensors on the
AVR controllers.

Also I would like to know wich programmer I must have for programming of all
different standard AVR. I was thinking about the STK500.

greetings to all,
John

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The STK500 works with all AVRs except the ATmegaxxx. Keep that in mind.

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Dieter,

The STK500 supports all ATmega parts also, with the current exception of ATmega103(L) due to its package size.

Best regards,

Morten, AVR tech. support, Atmel FAE

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for temperature sensing I normally just use a 2n2222 with emitter and base wired together. The junction drop created is relatively inverse linearly related to temperature, and the a/d in the avrs can get decent resolution of this to at least half a degree.

The humidity sensors I have seen in the past are basically variable resistors, stick a fixed resistor with it to make a voltage divider and you can measure that voltage with the a/d as well.

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