Pink Floyd – Wish You Were Here

Wish You Were Here

MI
– Open A | Hammer A-2T | Open D | D-2T       [#1]
– Strum
– Open G | D-2T | Open D                                [#2]

Sol
– Strum
– E-3T | [#1]

Mi
– Strum
– [#2]

Sol
– Strum
– E-3T | [#1]

Mi
– Strum
– D-2T | Open D | A-2T | Open A        [#3]

La
– Strum
– [#1]

Mi
– Strum
– [#3]

La
– Strum
– Open A | Hammer A-2T | Open D

Sol
– Strum

C – D – Am – G | D – C – Am – G

C                                       D                        Am
So, so you think you can tell Heaven from Hell,
G
blue skies from pain.
D                                  C
Can you tell a green field from a cold steel rail?
Am
A smile from a veil?
G
Do you think you can tell?

C                                       D
Did they get you to trade your heroes for ghosts?
Am
Hot ashes for trees?
G
Hot air for a cool breeze?
D
Cold comfort for change?
C                                           Am                                G
Did you exchange a walk on part in the war for a lead role in a cage?

[Intro]

How I wish, how I wish you were here.
We’re just two lost souls swimming in a fish bowl, year after year,
Running over the same old ground.
What have we found? The same old fears.
Wish you were here.

 

Anúncios

Pink Floyd – Comfortably Numb

Comfortably Numb

Versus [Bm – A – G – Em – Bm]

Bm
Hello,
A
Is there anybody in there?
G           Em
Just nod if you can hear me.
Bm
Is there anyone at home?

Come on now
I hear you’re feeling down
Well, I can ease your pain
And get you on your feet again

Relax
I’ll need some information first
Just the basic facts
Can you show me where it hurts?

D                                                   A
There is no pain, you are receding
D                                                   A
A distant ship smoke on the horizon
C                                                       G
You are only coming through in waves
C                                                                       G
Your lips move but I can’t hear what you’re saying
D                                               A
When I was a child I had a fever
D                                                  A
My hands felt just like two balloons
C                                                    G
Now I’ve got that feeling once again
C                                                            G
I can’t explain, you would not understand
This is not how I am

A  – C                G                 D
I have become comfortably numb

I have become comfortably numb

O.K.
Just a little pin prick
There’ll be no more aaaaaaaah!
But you may feel a little sick

Can you stand up?
I do believe it’s working, good
That’ll keep you going through the show
Come on, it’s time to go.

There is no pain you are receding
A distant ship smoke on the horizon
You are only coming through in waves
Your lips move but I can’t hear what you’re saying
When I was a child
I caught a fleeting glimpse
Out of the corner of my eye
I turned to look but it was gone
I cannot put my finger on it now
The child is grown
The dream is gone
I have become comfortably numb.

 

Differential Drive Simulator

Differential drive é um método para controlar um robot com apenas duas rodas. O termo “differencial” significa que a velocidade de rotação do robot é determinada pela diferença de velocidade aplicada a cada uma das rodas, por exemplo manter a roda esquerda parada e aplicar velocidade a roda direita fará com que o robot vire para a esquerda, aplicar a mesma velocidade a ambas as rodas fará com que o robot ande em frente.

Existem várias técnicas para optimizar este tipo de movimento tal como PID Control,  um dos principais desafios que encontrei é o facto de existirem muitas variaveis que podem afectar o desempenho como por exemplo a carga das baterias o estado do piso, etc….

Por isso, e de forma a testar o código para controlar o meu robot, decidi criar um simulador em Processing. O simulador permite desenhar um circuito e utilizar o teclado para fazer o robot percorrer esse mesmo circuito. A tecla UP faz o robot andar em frente, a tecla LEFT faz virar a esquerda, a tecla RIGHT faz virar a direita e a tecla DOWN faz o robot parar.

Para já o robot tem que ser controlado manualmente, o proximo passo é simular as leituras do sensor de modo a implementar a função de piloto automático e fazer o robot navegar sozinho. Em baixo coloco todo o código desenvolvido até ao momento e um ficheiro executável para quem não tem o processing e quiser experimentar o simulador.

Download do código e ficheiro executável

Links/eBooks (Electrónica)

Ligações Uteis

Página Oficial Arduino
Forum LusoRobotica
Loja Online In Motion
Let´s Make Robots
Society of Robots

Graphical Resistor Calculator
Curso de electrónica – Condensadores (Br)
The Basic Electric Circuit
LM7805 Voltage Regulator Tutorial

eBooks

Programming NoteBook
Introdução Eletronica
Como Soldar

Bionic Class       Parte 1   Parte 2   Parte 3   Parte 4
Spooky Class     Parte 1   Parte 2   Parte 3   Parte 4