CAN u help me?thermostat with ntc termistor (R=10k) with op amp ?

[mcsniper]

I don t know how to do?wich op amp would i chose?
termistor :NTC R=10k [25;60]ºc and  tºref=36º
op amp [0,5]V

I don t know how could I do it

Vout of op amp proporcional to Rtermistor which serve as entry to conversor A/D of 8 bits

25ºC->0V
60º->5V

when tº exceed tºref(36ºc)+-5% .it produce:

a-)PWM signal with period of 0.5ms and dutty cycle of 50%
b-)signal (I don´t know the name it looks like tooth ) with period 0.5ms
c-)activate exit to 220V