I’d recommend Adafruit’s touch toggle switch for this, not sure how well it’ll work through/across glass though:
Adafruit have a guide on wiring one up, but we don’t supply the relay box they are using, you’d likely use something like this on your DC power for your strips instead:
Which relay power are you referring to? I believe what James was referencing was to follow the Adafruit guide and components to a similar effect for your project, unfortunately the Powerswitch Tail II was retired and doesn’t have a direct replacement:
Other than the lighting, you’ll likely need a relay system, possibly with a microcontroller depending on which relay/s you’re using, and connect this to your capacitive touch sensor so that you can switch the power to your LEDs on and off.
In my opinion, I’d suggest going with some WS2812Bs on an LED strip, an appropriate driver board, and a microcontroller of your preference such as a Uno or Pico which you can hook up to the driver and sensor to control the LEDs.
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