Lockable door latch for my new shed

Only problem there, at least in my area, is that most intruders can't read. About the only sign they would recognize is the "Beware Of Dog" and "Danger, High Voltage". The picture of a pistol might work, though. My shop has metal doors and the barn has a sheet metal skin. An old control transformer, 480/120, hooked up backward works wonders. Although I have a resistor to keep current below the lethal region, it'll still knock a man off his feet. A fence charger is pulsed, the home brew job is continuous. An old car ignition coil and a "vibrator" works even better and runs off low voltage.

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