1 files changed, 24 insertions, 0 deletions
diff --git a/275/CH4/EX4.4.18/Ch4_4_18.sce b/275/CH4/EX4.4.18/Ch4_4_18.sce
new file mode 100755
index 000000000..a8bced337
--- /dev/null
+++ b/275/CH4/EX4.4.18/Ch4_4_18.sce
@@ -0,0 +1,24 @@
+clc
+disp("Example 4.18")
+printf("\n")
+disp("Calculate input voltage that turns SCR ON, & find supply voltage that turns SCR OFF if holding current is 10mA")
+printf("Given\n")
+printf("Resistance are in ohms \nCurrent are in Ampere \n Voltage sources are in volt\n")
+//gate trigger voltage
+Vgt=0.75
+//trigger current
+Igt=5*10^-3
+//gate resistance
+Rg=1000
+//load resistance
+RL=100
+//diode forward voltage
+Vf=0.7
+//holding current
+Ih=10*10^-3
+//minimum input voltage to trigger the SCR is
+Vin=Vgt+(Igt*Rg)
+//The supply voltage that turns OFF the SCR is
+VCC=Vf+(Ih*RL)
+printf("minimum input voltage to trigger the SCR is %f volt \n",Vin)
+printf("The supply voltage that turns OFF the SCR is %f volt \n",VCC)