On Jun 30, 1:01 am, "JohnK" <[email protected]> wrote: > ----- Original Message ----- > Subject: Re: [neonixie-l] Re: US power grid frequency tests. > >> The vast majority of line powered clocks use > >> the grid frequency for timing, > > All this talk of line frequency reminds me of when we attached a 'powerful' > audio sig gen to the lecture room clock back in 1968. Got us 10 mins less > boredom.
I remember reading about something like that, probably more than 25 years ago when I was still in high school. Apparently there was a certain professor who was so meticulous in preparing and pacing his lectures, that with seldom even a glance at the clock, he always managed to have them end right at the end of the class period. Some ingenious hardware hacker students did as you described and messed with the prof's head by speeding up and slowing down the clock, just to watch him get flustered from running out of time or having time left over at the ends of his presentations. I always wondered just how it was done, and the size of the hardware that would be required. Of course today it's fairly trivial to do in a small package, but back then, I'm not so sure. A.J. -- You received this message because you are subscribed to the Google Groups "neonixie-l" group. To post to this group, send an email to [email protected]. To unsubscribe from this group, send email to [email protected]. For more options, visit this group at http://groups.google.com/group/neonixie-l?hl=en-GB.
