That is a very fun prank to do. Show someone an o'scope with a flat line on it and hand them a pretzel or carrot.
Tell them that you have implanted several sensors into their brain and you want to calibrate them starting with mandibular vibration. I have seriously freaked some people out with this one. Dave > -----Original Message----- > From: time-nuts-boun...@febo.com > [mailto:time-nuts-boun...@febo.com] On Behalf Of gary > Sent: Tuesday, September 18, 2012 12:28 > To: time-nuts@febo.com > Subject: Re: [time-nuts] Hi Power LED Light power supply... > > There are ways for the flicker to be more evident. Don't laugh, but > chewing something hard like a pretzel can bring out the flicker. > Basically you can get beat patterns between the vibration of your eye > and the light flicker. > > There is a common problem with DLP projectors that use color > wheels. You > will see reviewers shaking their heads and eat crunchy food > in order to > see "rainbows" on the screen. > > A similar problem occurs with matrixed LED displays mounted > on machinery > that has vibration. Very common in industrial controls since > they like > LEDs for readability. > > When I designed the 2nd generation LED display drivers, I bumped the > refresh rate to 500Hz min. That was about 2x the frequency > where I ran > out of convoluted experiments to detect flicker. > > On an analog scope, you can display a flat line and have it wiggle by > eating something crunchy. I don't have an analog scope on the > bench at > the moment, otherwise I would figure out the right > circumstances to make > that happen. > _______________________________________________ time-nuts mailing list -- time-nuts@febo.com To unsubscribe, go to https://www.febo.com/cgi-bin/mailman/listinfo/time-nuts and follow the instructions there.
