eBay "induction" night light teardown

I get the feeling that this listing was used without realising that it was for a different type of product. The 3m induction sensing range only works when a 3m stick is used to push the button.

This was a cheap light, and I was intrigued to see the circuitry associated with the sensing. It turns out there isn't any. Interestingly, most of the negative feedback comments were about it being shipped as a UK night light, but actually having an incompatible plug.

The one redeeming feature of this unit is that it does use multi-chip LEDs for greater efficiency. That reduces the voltage dropped across the resistor, and increases the light output significantly from the low current necessitated by the use of a simple resistive dropper.

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