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Re: Help me settle a bar bet...

Another easy way: take two LEDs, hook one to a battery, and have them stare straight ahead while you move it around in front of them. It will look like a "solid line" (sort of like the photo of Picasso drawing the bull in the middle of the air, in the dark, in one very long exposure).

Take the other LED and connect it to an unrectified (AC) wall-wart. If it's more than 3V, stick a 560? to 680? resistor in series with one lead, and don't go past 15V or so. Anyway, when you move this one around in front of them with them staring straight ahead, it will appear to blink rapidly.

If they STILL won't believe you, pick up their turntable and wave it around in the air in front of their face!

BT

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