This is a stand I created to light up my bubblegram (laser glass ornaments) with LEDs.
I have used 2 RGB LEDS to cycle through different colours using PWM signals from a Elegoo Nano (Arduino clone)
A 220 ohm resistor has been added to each of the three anodes on both of the LEDs.
See photos for how I have arranged electronics. I could have done it neater if I knew I was going to use two LEDs from the beginning.
I am using PWM pins 9, 10, 11 on the nano to control RGB. You can get the code I use to control the lights from my github project page https://github.com/shane-powell/led-lighting
The case has a lip around the top to stop the ornament from sliding off. I have a few of these and they all seem to be a standard size.
3D Hero PLA