Uploaded November 2025 | Updated September 2026, 3 weeks ago

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Reverse engineering a remote power switch... a nifty gadget for having a "light switch" on a wall and then, typically, a lamp in a room.

Based around a surface-acoustic-wave (SAW) resonator and a small microprocessor which generate a unique 20 bit modulation signal.

More info, including LT spice here:
electronupdate.blogspot.com/2025/11/ali-express-remote-power-switch.html


Listing of the specific switch:
aliexpress.com/item/1005008624426312.html