Electronic – Is it possible to reduce range of an RF receiver or transmitter for LED Strip lights

antennaledled stripremoteRF

Background:

I recently purchased a couple of strip led lights with remote. These were installed in different rooms.

Problem:

The remote seems to be RF and not IR, thus all the lights in various rooms turn on/off together. This is pretty annoying at the least.

Learned from this thread that reducing transmitter range may not be possible.
<==This is what finally worked, hence edited the title!!

I wonder if there is any possibility to reduce the range of receiver (picture attached.)

FYI, the receiver is also the power supply.

I cut off the green circled coil and still this light works from the remote in other room.
What is the plate in the red circle?

Edit 1:

  1. I tried wrapping the receiver/power supply in aluminum foil (Like all around except the leaving space for prongs.) It surprisingly had no impact. This still puzzles me.
  2. I have 3 remotes and 3 of these lights. One remote can control all.

Edit 2:

  1. Adding two other pics of that RED thingy
  2. Name on the Power supply is CNSUNWAY Lighting

Edit 3:
Found something that worked for me. Will post the answer below.

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Best Answer

Rednecky Solution that worked:

Thanks for chiming in @mhaselup @Lundin @Bimperlrekkie @比尔盖子 @Russell McMahon @frr @Chris Stratton @Justin

For others looking for similar problem, here is what worked for me. Issue: 3 LED Strip lights in different rooms, change together even if you want to control a single one. Ideally, buy the IR lights, so you don't face this issue.

What did not work: Changes in Power Supply/Receiver did not work. Ignore my misdirection towards that plate and antenna.

What worked (takes 15 mins):

  1. Open up the remote - Remove battery, Peel top layer and then open up 4 tiny screws. Pull the PCB out, gently.
  2. Scrape off the printed connection to antenna, blue circle on right (or so I think)
  3. I also removed a tiny component which appeared to be a resistor (left blue circle)
  4. Put it back together. Insert battery
  5. Had an adhesive backed foil laying around. Covered the led and some part of the back.
  6. Done

Result = Distance between power-supply/receiver and remote now have to be 2-3 feet for it to work.

Remote-1 Remote-2 Remote-3 Remote-4 Remote-5

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