Inside a sticky (glue board) fly trap (with ballast schematic)

Much simpler than the zapping fly traps, this type uses a UVA lamp to attract flies to a replaceable sticky board. When they land on it they get stuck.

The most complicated part of this is the electronic ballast for the tube, which is the same sort of circuitry you'd find inside a compact fluorescent lamp.

Interesting startup circuit. Very minimalist.

This unit does have a weird design flaw. It has to be plugged into an extension or adaptor, since the case fouls the switch on most UK sockets, preventing it from being plugged in fully.

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