Simple DIY Air Purifier
Stair-bench for Your Home, Office or Workshop
New Life for a Old Fan Found in Trash
Adjustable Power Supply
Low-cost Zener Diode Tester
Battery Charger
New Life for Old Flashlight
Economic Home Audio System with Low-cost Car Radio
Photographing Owls and Other Nocturnal Animals
CR123A Battery Adapter for Night Vision Goggles
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