Oddly complicated dimmable sticky fly trap

I was expecting this unit to be super-simple inside with a capacitive dropper, a zener to cap the voltage and a potentiometer in series with a string of LEDs. But it turns out to be much more complicated.

I guess the justification is that it is universal voltage and the UV LEDs are run at higher current than the blue ones.

I subsequently noticed that the potentiometer is only used for part of its arc, and as such the full PWM range is scaled into that arc.

This was a random eBay purchase.



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