Difference between revisions of "Hw1 ECE301S11 Alberto Peralta" - Rhea

Revision as of 13:14, 15 January 2011

%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%
%
% Programmer and Purdue Email Address:
% 1.Alberto Peralta aperalta@purdue.edu
%
% Homework #:01
%
%
%
%
%
% Program Description:This program will attempt to play Smoke in the water in its
% original speed, then tw0 times faster and then with an octave higher,
% lasting half the time
%
%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%/
tempo=(60/112);
Sol=(2^(-2/12))*440;
Sib=(2^(1/12))*440;
Do=(2^(3/12))*440;
Reb=(2^(4/12))*440;
deltat = .00005;
negra=0:deltat:1*tempo;
puntillo=0:deltat:1.5*tempo;
corchea=0:deltat:.5*tempo;
blanca=0:deltat:2*tempo;
silencio= 0:deltat:2.5*tempo;

SolN= sin(2*pi*Sol*negra);
SiN= sin(2*pi*Sib*negra);
DoP= sin(2*pi*Do*puntillo);
DoB= sin(2*pi*Do*blanca);
ReC= sin(2*pi*Reb*corchea);
silencioP= sin(silencio);

Smoke=[SolN, SiN, DoP,SolN, SiN ,ReC,DoB,SolN, SiN,DoP,SiN,SolN,silencioP];

sound(Smoke, 1/delta);
wavwrite(Smoke,1/delta,32, 'Normal Speed')


tempo=(60/112)/2;

negra=0:deltat:1*tempo;
puntillo=0:deltat:1.5*tempo;
corchea=0:deltat:.5*tempo;
blanca=0:deltat:2*tempo;
silencio= 0:deltat:2.5*tempo;

SolN= sin(2*pi*Sol*negra);
SiN= sin(2*pi*Sib*negra);
DoP= sin(2*pi*Do*puntillo);
DoB= sin(2*pi*Do*blanca);
ReC= sin(2*pi*Reb*corchea);
silencioP= sin(silencio);

Smoke=[SolN, SiN, DoP,SolN, SiN ,ReC,DoB,SolN, SiN,DoP,SiN,SolN,silencioP];

sound(Smoke, 1/delta);
wavwrite(Smoke,1/delta,32, 'Faster Speed')



SolN= sin(4*pi*Sol*negra);
SiN= sin(4*pi*Sib*negra);
DoP= sin(4*pi*Do*puntillo);
DoB= sin(4*pi*Do*blanca);
ReC= sin(4*pi*Reb*corchea);
silencioP= sin(silencio);

Smoke=[SolN, SiN, DoP,SolN, SiN ,ReC,DoB,SolN, SiN,DoP,SiN,SolN,silencioP];

sound(Smoke, 1/delta);
wavwrite(Smoke,1/delta,32, 'x(2t) ')

Y= wavread('Beatles');
F = flipud(Y);
sound(Y, Fs)
wavwrite(F,1/delta,32, 'Flipped Beatles ')
%The forward message of this Beatles song is Number 9
%When the flipud function was used it was hard to retrieve
%any message with any sense out of the file. I picked up some
%words like 'turn' and 'on'though. I dont think there is a real
%hidden message in this song.

CONCLUSIONS

6.1 In our transfer characteristics plot, the middle part between Voh and Vol presented a lot of noise. It was concluded was produced by the effects of the oscilloscope probe. Other than that, the plot satisfied all the predicted measurement and properties.
6.2 Measurements were made according to the given parameters.
6.3 Comparing our noise measurement with Fairchild’s Measurements it was founded a 2.2% error for Noise Margin High, and a 11.11% for the Noise margin Low.
6.4 For further experiments, greater caution will be taken when constructing the circuit so that no transistors are damaged. A wire was placed where it was not supposed to; this led to the burning of the CD4007. Frequency was found to be 460.8Hz.