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Chinese Insect Zapper (Mosquito Killer) - crazy circuit and burning resistors.
This is a teardown of a Chinese insect zapper (or mosquito killer). It has a completely mad circuit that makes no sense - probably a totally botched up conversion from a fluorescent tube to a UV LED). After a few seconds, two resistors started to burn inside. It also has no discharge resistors, so the grid and the plug can give you a shock after it's unplugged. The picture in the listing says it also kills rats, although I really can't imagine how the rodents could get through the grid into the machine (which, at the top of it, is meant to hang from a ceiling). Warning - dangerous voltages. There's a high voltage in the grid with no mains isolation. Capacitors do stay charged after turned off / unplugged.
UPDATE: I've got a full refund for this rubbish.
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