Originally, this ring came with a dimmer, but it was built into the wall adapter so

not very useful for portable projects. This guide on analog RGB LED strip control

will show you how to dim a 9V LED - you'll want a microcontroller with a PWM

output, and a single N-MOSFETs to control the power

TECHNICAL DETAILS



Weight: 41.4g



Overall diameter: 76mm / 2.9"



Inner diameter: 57.5mm / 2.2"



Cable length: 8.5mm / 0.33"

 

  

 

 

https://www.adafruit.com/product/4433/12‐20‐19