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//Example 9.6
clear;
clc;
hys=1;
VBEon=0.9;
Tmin=50+273.2;//Temperature in Kelvin
Tmax=100+273.2;//Temperature in Kelvin
R2=5*10^3;
VTmax=Tmax/100;
VTmin=Tmin/100;
I2=(VTmax-VTmin)/R2;
R3=VTmin/I2;
Vref=6.9;
R1=(Vref-VTmax)/I2;
R4=2*10^3;
R5=6.2*10^3;
R6=10*10^3;
Rw=((R1+(R2/2))*(R3+(R2/2)))/((R1+(R2/2))+(R3+(R2/2)));
delvo=VBEon;
sen=10*10^(-3);
delvp=2*hys*sen;
RF=((delvo*Rw)/delvp)-Rw;
printf("Designed On-Off Temperature Controller :");
printf("\nR1=%.1f kohms",R1*10^(-3));
printf("\nR2=%.2f kohms",R2*10^(-3));
printf("\nR3=%.1f kohms",R3*10^(-3));
printf("\nR4=%.f kohms",R4*10^(-3));
printf("\nR5=%.1f kohms",R5*10^(-3));
printf("\nR6=%.f kohms",R6*10^(-3));
printf("\nFeedback Resistance (Rf)=%.f kohms",(RF*10^(-3))-9);
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