Please help me in solving this problem :
Design a circuit to control teh temperature of a water bath at a setpoint temperature of 75 degree celcius. Choose a resistive sendor and draw up a bridge circuit which will provide a control around the setpoint. Suggest values for all components to be used. Heat can be supplied to a heater in the bath using power amplifier which requires 0 to +0.5 V for zero to maximum power output.