Rainbow Lamps - Wireless Synchronized Lamps




Introduction: Rainbow Lamps - Wireless Synchronized Lamps

About: I am a Computer Science Student. I love playing with electronics and codes. Making Brand new projects.

Rainbow Lights are ESP32-C3 based RGB lamps which are synchronised using ESP-Now Communication Protocol. The Lamps are designed in #fusion360 and 3D printed in #ender3. #Adafruits 16LED Neopixels rings are used in these lamps.

The basic functionality of these lamps is to be in wireless sync and change the colours according to the program. So currently I have programed them in two modes:

Mode 1: When we touch any one coloured lamp, all the lamps glow in that colour, stay for 2 seconds and go back to their original colour.

Mode 2: In second mode the colour we touched stays as long as power shutdown or unless we touch any other lamp.

We can use this lamps as Childrens Play Lamps, Mood Lamps, Photo/Videography, Background fill lights and more.....

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Step 1: 3D Design

Step 2: 3D Printing

  • 3D Print the above .stl files:
  • 5x Housing in any color you want
  • 5x Cover in white color filament
  • 5x ESP32-C3-Mount in any color
  • 5x Neopixel-Plate in any color
  • I used Ultimaker Cura for slicing.
  • Settings:
  • Layer height: 2mm
  • Print speed: 100
  • No Support
  • Printed on Ender3

Step 3: Soldering

  • Solder the ESP32-C3 Module and Expansion board together using header thats provided in the same pack.
  • Take reference of the image provided above or align the pins naming properly.

Step 4: Connections

  • Connect all the electronic components as shown in the circuit diagram.
  • Make sure everything is connected as per diagram before you power it on.

Step 5: Assembly

  • Place the battery in its holder.
  • Push the Push Switch in its slot use glue if necessary.
  • Place the ESP32C3 Module in its mount and screw them.
  • Put the Neopixel ring in the base plate and use some glue.
  • Stick the Touch sensor on to the Cover.

Step 6: Snap Fit

  • The lamp parts are designed in such a way that they can snap fit together.
  • Align the teeths of the parts correctly and snap them together.
  • The Neopixel Plate can snap fit in the Cover and then the Cover can be snaped on to the Housing.

Step 7: Arduino IDE Setup

  • First go to File->Preferences->Additional Boards Manager URL and paste the following URL
  • Then go to Tools->Board->Board Manager and Search for ESP32 and install it.
  • Go to Sketch->Include Library->Manage Libraries and search for Adafruit NeoPixel and insatll it.

Step 8: Programming

  • Click To Download The Code
  • Open the .ino file in Arduino IDE.
  • You have to change the deviceNo = 1/2/3/4/5 as per your device number.
  • You can change the ClearColor = False, to make the changed colour in stay mode.
//Change This Values
int deviceNo = 1;         //Device Number
bool ClearColor = true;      //Do you want to clear the broadcast color?
  • Now You have to board type from Tools->Board->ESP32 Arduino->ESP32C3 Dev Module.
  • Selsct the com port number from Tools->Port
  • You can Enable or Disable the Tools->USB CDC On Boot to enable or disable the Serial Monitor. (I prefer disable it unless you are making changes in the code).
  • Click on upload the lamp will glow with a particular color that you have specified as deviceNo.

Step 9: Color Change

  • You can change the colors in the code, I used this simple color picker and copied the RGB color values into the code.
colorWipe(strip.Color(255, 0, 0), 10);  // Red (Device 1)
colorWipe(strip.Color(255, 255, 0), 10);  // Yellow (Device 2)
colorWipe(strip.Color(0, 255, 0), 10);  // Green (Device 3)
colorWipe(strip.Color(255, 0, 255), 10);  // Pink (Device 4)
colorWipe(strip.Color(0, 0, 255), 10);  // Blue (Device 5)

Step 10: Charging

  • You can directly charge the battery though ESP32-C3 Modules Type C, since this module have on board charging and overcarge protection feture.

Step 11: Showcase

I hope you have fun making this project.

Thank You!

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    Tip 7 weeks ago

    Very Interesting project, but I would recommend using something light like ESP8266 because ESP32 is quite an overkill for the RGB sync application. Although, I really enjoyed reading the entire process of this project build.


    Question 2 months ago

    How about NiMH batteries instead of Li-Ion? $5 each instead of $24 each. How would the two types of batteries differ?


    Question 2 months ago

    Very interesting project. Could even change the code to randomize the colors every few seconds, and change the brightness.
    How long should we expect the batteries to last?
    How far apart can the modules be placed?


    Answer 2 months ago

    Yes we can change the color patterns, timing and brightness by changing the code.

    I didn't test the battery runtime but I guess its around 4-5 hrs on full charge.

    I have tested the range and I found its around 20-30 mts.