A teardown of a cheap insect zapper from a supermarket. The type is LJ3W-010 (or LJ-3W010), made by Calter, imported by Rulyt. It uses an ultraviolet fluorescent tube, it runs on 220V AC 50Hz mains and it claims 3W power input, 600V zapper grid voltage. Let's see what's inside and how does it work, including the schematic and tube autopsy. Is this zapper any good? Is it safe?

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