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Elec Roach Motel - Using a PIC for this device provides a lot of useful functionality. The timing for the power pulse to the inductor is critical to getting the best Zap from your nine volt battery.  The longer the current is on, the higher the voltage.  Once the inductor reaches saturation, however, you are just waisting power.Insect Repellant

Bug Zapper #2:

Insect Repellant:

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