10 files changed, 125 insertions, 0 deletions
diff --git a/317/CH15/EX15.1/example1.sce b/317/CH15/EX15.1/example1.sce
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+// find diode current
+// Electronic Principles
+// By Albert Malvino , David Bates
+// Seventh Edition
+// The McGraw-Hill Companies
+// Example 15-1, page 524
+
+clear; clc; close;
+
+// Given data
+Vb=10;// breakover voltage of the diode
+V=15;// input voltage in volts
+Ih=4*10^-3;// holding current in amperes
+Vd=0.7 ;// voltage across diode in volts
+R=100;// resistance in ohms
+
+// Calculations
+// as V>Vb ,the diode breaks over .Taking into consideration the voltage across the diode
+I=(V-Vd)/R;// diode current in amperes 
+disp("Amperes",I,"diode current=")
+
+// Result
+// Diode current is 143 mAmperes
+\ No newline at end of file
diff --git a/317/CH15/EX15.1/example1.txt b/317/CH15/EX15.1/example1.txt
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+Diode current is 143 mAmperes
+\ No newline at end of file
diff --git a/317/CH15/EX15.4/example4.sce b/317/CH15/EX15.4/example4.sce
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+// find input and supply voltage for the SCR
+// Electronic Principles
+// By Albert Malvino , David Bates
+// Seventh Edition
+// The McGraw-Hill Companies
+// Example 15-4, page 531
+
+clear; clc; close;
+
+// Given data
+Vgt=0.75 ;// gate trigger voltage in volts
+Igt=7*10^-3;// gate trigger current in amperes
+Rg=10^3;// in ohms
+Rl=100;// in ohms
+Ih=6*10^-3;// holding current in amperes
+
+// Calculations
+Vin=Vgt + (Igt*Rg);// input voltage in volts
+Vcc=0.7 + (Ih*Rl);// supply voltage in volts
+disp("Volts",Vin,"Input voltage=")
+disp("Volts",Vcc,"Supply voltage=")
+
+// Result
+// Minimum input voltage needed to trigger the SCR is 7.75 Volts
+// Supply voltage that turns off the SCR is 1.3 Volts
+\ No newline at end of file
diff --git a/317/CH15/EX15.4/example4.txt b/317/CH15/EX15.4/example4.txt
new file mode 100755
index 000000000..fd801b0e8
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+++ b/317/CH15/EX15.4/example4.txt
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+Minimum input voltage needed to trigger the SCR is 7.75 Volts
+Supply voltage that turns off the SCR is 1.3 Volts
+\ No newline at end of file
diff --git a/317/CH15/EX15.5/example5.sce b/317/CH15/EX15.5/example5.sce
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index 000000000..a93f212b2
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+++ b/317/CH15/EX15.5/example5.sce
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+// find peak output voltage and frequency
+// Electronic Principles
+// By Albert Malvino , David Bates
+// Seventh Edition
+// The McGraw-Hill Companies
+// Example 15-5, page 532
+
+clear; clc; close;
+
+// Given data
+R1=900;// from the figure in ohms
+R2=100;// from the figure in ohms
+Vgt=1 ;// gate trigger voltage in volts
+Igt=200*10^-6;// gate trigger current in amperes
+C=0.2*10^-6;// capacitance in faraday
+R=50;// thevenin resistance facing the capacitance when the SCR is off
+
+// Calculations
+Rth=R1*R2/(R1+R2);// thevenin resistance
+Rg=Rth;// in ohms 
+Vin=Vgt + (Igt*Rg);// input voltage in volts
+Vpeak=10*Vin;// because of 10:1 voltage divider, the output voltage is 10(Vin)
+T=0.2*R*C ;// period of sawtooth is 20% of time constant in seconds
+f=1/T;// frequency in Hertz
+disp("Volts",Vpeak,"Peak output voltage=")
+disp("hertz",f,"frequency=")
+
+// Results
+// Peak output voltage is 10.1 Volts
+// Frequency is 50 KHertz
+\ No newline at end of file
diff --git a/317/CH15/EX15.5/example5.txt b/317/CH15/EX15.5/example5.txt
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+++ b/317/CH15/EX15.5/example5.txt
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+Peak output voltage is 10.1 Volts
+Frequency is 50 KHertz
+\ No newline at end of file
diff --git a/317/CH15/EX15.6/example6.sce b/317/CH15/EX15.6/example6.sce
new file mode 100755
index 000000000..88034723d
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+++ b/317/CH15/EX15.6/example6.sce
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+// find supply voltage 
+// Electronic Principles
+// By Albert Malvino , David Bates
+// Seventh Edition
+// The McGraw-Hill Companies
+// Example 15-6, page 536
+
+clear; clc; close;
+
+// Given dataVz=5.6;// breakdown voltage in volts
+Vgt=0.75;// gate trigger voltage in volts
+Vz=5.6;// breakdown voltage in volts
+
+// Calculations
+Vcc=Vz+Vgt;// overvoltage firing the SCR in volts
+disp("Volts",Vcc,"Supply voltage=")
+
+// Results
+// Supply voltage that turns the crowbar is 6.35 volts
+\ No newline at end of file
diff --git a/317/CH15/EX15.6/example6.txt b/317/CH15/EX15.6/example6.txt
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index 000000000..7f8630211
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+Supply voltage that turns the crowbar is 6.35 volts
+\ No newline at end of file
diff --git a/317/CH15/EX15.8/example8.sce b/317/CH15/EX15.8/example8.sce
new file mode 100755
index 000000000..aa2eb9703
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+// find current through the resistor
+// Electronic Principles
+// By Albert Malvino , David Bates
+// Seventh Edition
+// The McGraw-Hill Companies
+// Example 15-8, page 546
+
+clear; clc; close;
+
+// Given data
+R1=82;// givenin ohms
+R2=22;// given in ohms
+Vgt=75;//  in volts
+
+// Calculations
+// Ideally the triac has 0 voltas across it when conducting 
+I=Vgt/R2;// current through 22 ohm resistor in amperes
+disp("Amperes",I,"current through 22 ohm resistor=")
+
+// Results
+// Current through the 22 ohm resistor is 3.41 Amperes
+\ No newline at end of file
diff --git a/317/CH15/EX15.8/example8.txt b/317/CH15/EX15.8/example8.txt
new file mode 100755
index 000000000..582ab2207
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+Current through the 22 ohm resistor is 3.41 Amperes
+\ No newline at end of file