Title:           /*------------------------------------------------------ Student's Name: Colin
Author:          Fleshy
Pastebin link:   http://pastebin.com/06jZpw3n
First Edit:      Wednesday 27th of March 2013 08:31:21 PM CDT
Last Edit:       Wednesday 27th of March 2013 08:31:21 PM CDT

/*------------------------------------------------------
Student's Name: Colin Joshua Fraser
Student's email address: joshfraser91@gmail.com
Lab group (CL/01, CL/02,...): CL/03
Purpose of this assignment: *To practice the use of C data types, variables, expressions and simple input/output.
                            *To practice writing, compiling and running a simple C program.
Purpose of this program: To calculate parameters of a common-emitter audio amplifier.
-------------------------------------------------------*/
 
#include <stdio.h>               /* give access to the stdio.h library*/
 
#define Vc 6.5                   /* definition of constants */
#define Ve 1.3
#define Ic 3*10^-3
#define Hfe 100
 
int main(void)
{
     float Vin;                   /* variable definition. range 0.01 - 0.05 (v)*/
     float Vcc;                   /* variable definition. 9.0, 10.0 or 12.0 (v)*/
     float Ib;                    /* variable definition: base current */
     float R1;                    /* variable definition: resistors */
     float R2;
     float R3;
     float R4;
     float Vb;                    /* variable definition: base voltage */
     float Ks;                    /* variable definition: Signal Amplification */
     float Vout;                  /* variable definition: Output voltage */
     
     printf("Enter the input voltage (range 0.01 - 0.05 (v): ");
     scanf("%f",  &Vin );
     printf("Enter the positive supply voltage (9.0, 10.0 or 12.0 (v): ");
     scanf("%f",  &Vcc );
     
     Ib = Ic/Hfe;                /* calculate the base current (A)*/
     R1 = (Vcc - (float)Vc)/(float)Ic;          /* calculate resistance 1 (ohm) */
     R2 = Ve / ((float)Ic + Ib);         /* calculate resistance 2 (ohm) */
     Vb = Ve + 0.7;               /* calculate base voltage (v) */
     R4 = Vb / (5 * Ib);          /* calculate resistance 4 (ohm) */
     R3 = (Vcc - Vb)/(6 * Ib);    /* calculate resistance 3 (ohm) */
     Ks = R2/R2;                  /* calculate Signal Amplification */
     Vout = Vin * Ks;             /* calculate Output Signal (v) */
 
     printf("========================");   /*line break */
     printf("Resistors:);
     printf("R1 =%10.1f \n" , R1);    /*display resistance 1 */
 
     return 0;
}