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+//Caption:Design a square wave generator using 7555 CMOS
+//Ex8.4
+clc;
+clear;
+close;
+V=5//Supply voltage(in volts)
+f1=1//Frequency(in khz)
+f2=3//Frequency(in khz)
+C=0.01//Capacitance(in micro farad)
+Ra=47//Choosed resistor(in kilo ohm)
+t1=1/(2*f1)
+t2=1/(2*f2)
+R=t1/(0.693*C)
+Rb=R-Ra
+disp(C,Rb,Ra,'Components required to design the circuit are Ra,Rb(in kilo ohm) and Capacitance(in micro farad)=')
+\ No newline at end of file