initial commit / add all books

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diff --git a/3041/CH8/EX8.3/Ex8_3.sce b/3041/CH8/EX8.3/Ex8_3.sce
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+
+
+//Variable declaration
+C=0.01                     //capacitance(uF)
+R2=15                      //resistance(k ohms)
+Va2=4                      //voltage(V)
+Vcc=15.                    //supply voltage(V)
+R1=33                      //resistance(k ohms)
+
+//Calculations
+Va1=0.67*Vcc               //voltage(V)
+Vamax=Va1+Va2              //Va maximum(V)
+Vamin=Va1-Va2              //Va minimum(V)
+T1max=C*(R1+R2)*(log((1-(Vamax/(2*Vcc)))/(1-(Vamax/Vcc))))   //time period(ms)
+T1min=C*(R1+R2)*(log((1-(Vamin/(2*Vcc)))/(1-(Vamin/Vcc))))   //time period(ms)
+T2=0.693*R2*C
+fmax=1/(T1min+T2)                    //maximum frequency(K Hz)
+fmin=1/(T1max+T2)                    //miniimum frequency(K Hz)
+
+//Results
+printf ("minimum freq is %.2f",fmin)
+printf ("maximum freq is %.2f",fmax)
+printf(" (solution given in the textbook is incorrect)");