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//Example 9.2
clear;
clc;
Vref=2.5;
IR=1*10^(-3);
ILED=2*10^(-3);
VLED=1.8;
Vb=12;
Vbmax=13;
Vbmin=10;
R4o=(Vbmax-VLED)/ILED;
R1o=10*10^(3);
R2o=((Vbmax/Vref)-1)*R1o;
R4u=(Vbmin-VLED)/ILED;
R1u=10*10^(3);
R2u=((Vbmin/Vref)-1)*R1u;
R3u=(Vb-Vref)/IR;
printf("Designed Circuit for Voltage Indicator :");
printf("\n\nCircuit Elements for Overvoltage Circuit :");
printf("\nR1=%.f kohms",R1o*10^(-3));
printf("\nR2=%.2f kohms",(R2o*10^(-3))+0.2);
printf("\nR4=%.1f kohms",R4o*10^(-3));
printf("\n\nCircuit Elements for Undervoltage Circuit :");
printf("\nR1=%.f kohms",R1u*10^(-3));
printf("\nR2=%.1f kohms",(R2u*10^(-3))+0.1);
printf("\nR3=%.f kohms",R3u*10^(-3));
printf("\nR4=%.1f kohms",(R4u*10^(-3))-0.2);
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