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Automatic temperature controller

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Automatic temperature controller

Postby MrP » Sun May 19, 2013 10:14 am

Hello!

I'm having some trouble analysing this automatic temperature controller circuit. Can you please give me some indications? Thank you so much!

Image

How can I find the resistor RA value to impose a 45ºC temperature on resistor R5?
When switches I1 and I2 are open, how can I find the current that will start to heat the resistor R5 and the power dissipated?
And how can I find the same current with only one of the switches open?

I just need some advice to analyse this. Thank you so, so much!
MrP
 
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