README.md

   1 # Code Club - Mini Band Project
   2
   3 Make your own mini band!
   4 You and your friends can form your own finger-sized band and rock out using Raspberry Pi and Arduino.
   5 Learn how to build circuits with sensors and outputs and write a simple programme to control your instruments.
   6
   7 ## You will make:
   8
   9 * A guitar
  10 * A set of drums
  11 * A pair of maracas
  12
  13 ## You will need:
  14
  15 * 1 x Raspberry Pi (plus monitor and power supply)
  16 * USB hub
  17 * 2 x Arduino Uno boards (with USB cables)
  18 * 1 x strip potentiometer
  19 * 2 x tilt sensors
  20 * 4 x piezo buzzers (the type in greetings cards, easy to get from Maplin)
  21 * 10K resistors
  22 * Bread boards (1 per instrument)
  23 * Card
  24 * Sugru (or some other modelling material)
  25 * Electrical tape
  26 * Plastic drinking straw
  27 * Pencil
  28
  29
  30 ## Software requirements:
  31
  32 * Scratch
  33 * IDE developer environment for Arduino
  34 * Py Serial library
  35
  36 ## Drum Kit
  37
  38 ### 1. Make your drums
  39
  40 Take your 4 piezo buzzers and attach a ring of Sugru (or other modelling material) as shown in the picture.
  41 This will increase the flexibility and resonance of the sensors. Let the sugru set.
  42
  43
  44 ### 2. Connect the circuit
  45
  46 Piezo buzzers generate a small charges when you tap them, so they don’t need a power source.
  47 Connect one lead from your buzzer to one of your analogue inputs, and connect the other lead to ground.
  48 Repeat for each of your drums. It is easiest to use a bread board for making your circuit.
  49 Look at the picture for an example.
  50
  51
  52 ### 3. Progam the Arduino
  53
  54 Find the appropriate code from the respository and upload to your Ardunio board.
  55
  56
  57 ### 4. Set up in Scratch
  58
  59 Find four different drum sounds (or whatever sounds you'd like your drums to make!). Upload the sounds to Scratch.
  60
  61
  62 ## Guitar
  63
  64 ### 1. Make your guitar
  65
  66 Grab your strip potentiomater, a piece of thin card, and a pencil.
  67 Lightly draw round your potentiometer on the card and then use this as a guide to draw out your guitar shape.
  68 (The potentiomater will be the fret board of your guitar).
  69 Cut out and colour in the guitar and stick down the potentiomater.
  70 Tape a pencil or stick to the back of the guitar to make it stiffen the fret board.
  71
  72 ### 2. Connect the circuit
  73
  74 The potentiomater strip adjusts resistance, so you will need to feed it some electricity.
  75 Run +5V into one of the strip’s outer pins, and ground into the other outer pin.
  76 It doesn’t matter which way around you connect these, but it will affect which the direction
  77 the fretboard runs (high and the top, low at the bottom or vice-versa).
  78
  79 Signal will come from the centre pin, so connect that to one of your analogue inputs and you should be good to go.
  80
  81 ### 3. Set up in Scratch
  82
  83
  84
  85 ## Maracas
  86
  87 ### 1. Make your maracas
  88
  89 Cut 2 short lengths of drinking straw for your maraca handles.
  90 Using Sugru (or other modelling material), make 2 maraca heads by rolling it up into balls.
  91 Push the maraca heads onto the straws and mold into a maraca shape.
  92 Connect lengths of wire to the connectors of the 2 tilt sensors and then push each sensor into a straw until it presses into the Sugru.
  93 Leave the Sugru to set.
  94
  95
  96 ### 2. Connect the circuit
  97
  98 Connect the +5V port on the Arduino board to one of the pins on the tilt switch (it doesn't matter which way round).
  99 Connect the other pin to an empty digital input on the board.
 100
 101
 102 ### 3.
 103
 104
 105 ## Pull-down Resistors
 106
 107 You’ll find your analogue inputs receive signal when you don’t expect them to.
 108 This is because there’s electricty floating around in the system, or something like that.
 109
 110 To fix this, you need to wire each input to ground, through a 10KΩ resistor.
 111
 112 A better explanation can be found [here](http://arduino.cc/en/Tutorial/DigitalPins).