Parts list

The following is the list of parts required for a sound effects machine:

• Arduino Uno (one unit)

• 2N3904 NPN transistor (one unit)

• 8 ohm speaker (one unit)

• 470 ohm resistor (yellow, violet, brown, and gold) (one unit)

• 4.7 kilo ohm resistors (yellow, violet, red, and gold) (four units)

• Tactile pushbutton or toggle switches (four units)

• SD module (DFRobot [PN:DFR0071]) or Arduino compatible (one unit)

• Breadboard

• Wires