The components used in this chapter are available at most electronic component retailers (such as those listed previously in the General electronic component retailers section). They are also available as a complete kit from Pi Hardware; where items are available from specific retailers, they are highlighted in the text.

The kit for controlling an LED includes the following equipment:

• Four Dupont Female-to-Male Patch Wires (Pimoroni Jumper Jerky)
• A mini breadboard (170 tie-point) or a larger one (Pimoroni)
• An RGB LED (common-cathode) or 3 standard LEDs (ideally red/green/blue)
• A breadboarding wire (solid core)
• Three 470-ohm resistors

The kit for responding to a button includes the following equipment:

• Two Dupont Female to Male Patch wires (Pimoroni Jumper Jerky)
• A mini breadboard (170 tie-point) or a larger one (Pimoroni)
• A push button to make switch and momentary switch (or a wire connection
  to make/break the circuit)
• A breadboarding wire (solid core)
• A 1K ohm resistor

The items used for the controlled shutdown button are as follows:

• Three Dupont Female-to-Male Patch Wires (Pimoroni Jumper Jerky)
• A mini breadboard (170 tie-point) or larger (Pimoroni)
• A push-button switch (momentary close)
• A normal LED (red)
• Two 470-ohm resistors
• A breadboarding wire (solid core)

The additional items used in the There's more... section of the recipe, A controlled shutdown button, are as follows:

• A push button
• A 470-ohm resistor
• A pin header and two pins with a jumper connector (or optionally a switch)
• A breadboarding wire (solid core)
• Two 4 pin headers

The items used for the GPIO keypad input are as follows:

• Breadboard: half-sized or larger (Pimoroni)
• Seven Dupont Female-to-Male Patch Wires (Pimoroni Jumper Jerky)
• Six push buttons
• Six 470-ohm resistors
• Alternatively, a self-solder DPad Kit (Pi Hardware)

The items used for multiplexed color LEDs are as follows:

• Five Common-Cathode RGB LEDs
• Three 470-ohm resistors
• Vero-prototype board or large breadboard (Tandy)
• A self-solder RGB-LED kit (Pi Hardware)

The items used for writing messages require the same items as the preceding recipe, plus the following:

• A mounting stick, rubber bands, USB Wi-Fi, portable USB battery, and so on
• A Tilt Switch (ball-bearing type is suitable) (4-Tronix)