ElBanquos K-Pop Lightstick

A DIY "ightstick" with multiple light effects and song specific light show presets

Motivation

My daughter and her friends are huge fans of K-POP music and wanted to have these fancy light sticks, that are common in the concerts of K-POP groups. To be independent from an provider and restricted to one group, we decided to make our own with the following features

• Lot's of different multicolor light patterns to choose from
• Song specific presets, to have pattern changes aligned with the music
• Smartphone compatible webinterface for song selection and pattern programming
• BPM Detection and synchronization with integrated button
• on the fly programming of new light shows over web interface
• save and load songs to/from the flash memory
• connects to existing WLAN or creates its own Access Point

Material

• ESP8266 NodeMCU Board or D1 Mini
• Neopixel Jewel
• Pushbutton
• Small USB Power Pack or long USB Cable
• Tube that can hold NODEMCU and power pack
• small facette crystal
• transparent sphere

For more information check out my arduino project page

Software Architecture

The software is split up into the following modules

• Main Module: Coordination of processing time, Translation of input events (Button, Serial Input) into changes of pattern, Mangement of pattern sequences
• Input Module: Detection of button changes (and serial input if activated)
• WebUi Module: Redering of the WebUI and translation of WebUI Form Inputs to the main main module and management of network connection
• Lamp Module: Class to model a Hue/Saturation/Value Lamp and translate color into RGB
• Output Module: Controlling the Lamps and Pixels, Stepping and looping through a defined pattern until instructed otherwise. Contains functions for generic chase patterns and defines the available pattern presets (Chase mode, beat fraction tempo, color palette)
• Song Catalog Module: Manages reading and saving of songs patterns to the flash memory file system

What you will find in the repository

• Main Arduino sketch for the firmware (the_light_stick)
• Arduino sketch to format and prepare the flash memory file system (song_catalog_init)
• Additional sketches for separate developtment of light pattern(Arduino UNO compatible) and web interface(only on ESP8266)
• Additional sketches for simple demos of light control and web interface
• Documentation
  • Fritzing sketch for wireing used in the implementation
  • Manuals
  • Schematic