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(Hack A Day)   Old school clock bring back fishy memories   ( divider line
    More: Cool, digital systems  
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2276 clicks; posted to Geek » on 27 Jan 2014 at 11:21 AM (4 years ago)   |   Favorite    |   share:  Share on Twitter share via Email Share on Facebook   more»

7 Comments     (+0 »)
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2014-01-27 11:48:34 AM  
Well. That is both very cool and completely useless. A gigantic power-sucking test machine that takes up room on the bench that I don't have to spare, and a non-zero chance of blowing up and setting fire to your house if those ancient caps blow, to perform a function that can be done with a stick-on clock from the dollar store.

This guy could be a millionaire if he thought to put all of his obviously copious free time to a more productive purpose.
2014-01-27 12:23:08 PM  
It reminds me of the sort of people who would build elaborate circuits to convert oscilloscopes into tiny green TV sets.
2014-01-27 12:39:39 PM  
It's a cute hack, but I had to laugh at this line:

Since analog vectorscopes are pretty much obsolete, you can find them on eBay at low prices, so these oscilloclocks could be relatively cheap to build.

Sure, you can get them for around $100 plus $25-50 for shipping. But then you've got to keep them in power (I'm guessing they draw at least 200W or so) and tubes (pretty sure they were still using tubes for amplification, not just display, at that point).

I guess it's worth it, though, for the warmer... digits?... that you just can't reproduce with a modern digital clock. Hope they're using an oxygen-free power cord.
2014-01-27 02:34:06 PM  
Okay, my bad -- it's not a tube system. It's all sold-state except for the display tube, and even uses a few ICs -- RTL flip-flops. Only draws about 100 watts. So, only maybe 20 times the power of a regular glowy plug-into-the-wall LED clock, or about a million times the power of a battery-operated LCD clock.
2014-01-27 02:35:47 PM  

pdieten: This guy could be a millionaire if he thought to put all of his obviously copious free time to a more productive purpose.

Of course, becoming a millionaire is the final indicator of whether you're spending your time wisely. That's why we're here on Fark.
2014-01-27 04:47:35 PM  
Cover it in copper and brass, stick some gears on it, and sell it as 'steampunk' for 2500 dollars each.

You won't be able to keep them in stock.
2014-01-27 10:51:43 PM  
Good (bad?) memories of my broadcast engineering days.    The vectorscope and the waveform monitor went hand in hand in every studio and master control room.   I don't miss the analog days at all.   hunting down ground loops to get rid of 60 cycle hum bars in the video or buzz in the audio, adjusting signals from cameras who changed as their tubes warmed up, trying to prevent burn in on the cameras. (big Phillips LDK-9s).

Now just plug in the HD-SDI signal and you're clean and digital all the way through.
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