Family Feud Button

The component to the Family Feud Board. Source code and instructions to create the buttons using Arduino.

Diagram

Requirements

• Arduino nano.
• DFPlayer. (buy it [us][mx])
• Massive Arcade Button (buy it [us][mx])
• 1k ohm resistor.
• 10K ohm resistor.
• 3.5mm stereo audio jack (headphones).
• ULN2803
• 12v power supply.
• Micro SD card (old and low capacity).

Assemble as you require

You can follow the diagram and mount all the components for your need, in my case I used:

• 6x4cm board.
• USB jack (recycled from an old motherboard).

DFPlayer

This is an mp3 player that can be triggered by Arduino, I used this because can play complex audios like music instead of using some Arduino generated audio wave, it's really cheap (found it at $2.5 USD) and has a lot of useful features like:

• Stereo output for speakers.
• Stereo output for headphones.
• Analog inputs to be used with buttons.
• USB pins ( in case of not using the micro SD card).
• Powerfull library capable of:
  • Trigger specific audios.
  • Set volume.
  • Small eq.
  • Next, prev song.

Sounds

DFPlayer reads the audios from the microSD or the USB memory, the ring audios are inside the path /sounds inside this repo. All audios need to have a name with a prefix beginning with the 4 digits number (like 0001_name) for example in this project the sounds used are:

1. 0001_ringLeft.mp3
2. 0002_ringRight.mp3
3. 0003_ringMono.mp3

The sounds are panned for each side if the left side won the ring is going to sound only on the left channel of speakers, the same for the right side.

Arduino Nano

Has the perfect size and performance and for this project (doesnt require too much).

ULN2803

Some people call it an H bridge, is used to convert the 5v Arduino output to 12v output commonly is used to power motors, led lights and anything that requires more voltage than the nominal power provided by Arduino. the component it's inside this project to power Each arcade button that contains a 12v led, but also to control 2 channels of RGB led lights for the players, With a few fixes the Arduino could use the available PWD pins D3, D5, D6 and D9, D10, D11 in order to set the value for each color (one port per color per channel), The pins have to be connected to the 6 ULN2803 available spaces in order to get the complete 12v.

Code

The Arduino script is inside this repo called winnerButton.ino. Initialize the button and led pins, the DFPlayer and on the loop section behavies as state machine. following 3 simple states.

enum States{
  idle,          //waiting to be pressed
  buttonPressed, // when the one of the buttons is pressed
  buttonBlink,   // blinking for a few seconds before return to idle status. 
  }

References

• dummy question but i accept that i google it: https://www.arduino.cc/en/tutorial/button
• DFPlayer documentation: https://wiki.dfrobot.com/DFPlayer_Mini_SKU_DFR0299
• ULN2803 http://2.bp.blogspot.com/-Hqpv4xndQCc/T1_be_UMb4I/AAAAAAAABCc/pF-63NGLrnQ/s1600/uln2803.PNG
• Fritzing FDPlayer mini part: http://fritzing.org/projects/dfplayer-mini-part