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Old 11-19-2016, 11:21 PM   #11 (permalink)
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Well done! It would be great to see a video of the effect with the trains running too.
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Old 04-20-2017, 03:10 AM   #12 (permalink)
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Thats amazing.
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Old 04-22-2017, 08:36 PM   #13 (permalink)
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Quote:
Originally Posted by harvey View Post
Hello Dave,
I always thought that the objective of a hospital, especially a children's hospital was to get in get treated and get out as fast as possible? I can't imagine any child wanting to walk away from this display, especially as its interactive.
Very, very well done and for a great cause.
Thanks for sharing.
Cheers.

Agree. There is a very nice PIKO train display in Vanderbilt Children Hospital in Nashville as well. Sometimes I walked to there have lunch and watch trains, very fun.
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Old 04-22-2017, 08:56 PM   #14 (permalink)
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Shouldn't we see the lighting flash..., then hear the thunder a few moments later?
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Old 04-23-2017, 12:43 AM   #15 (permalink)
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Wow Dave very effective, you are quite the electronic genius.
Thanks for Sharing
Dennis
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Old 04-23-2017, 02:12 AM   #16 (permalink)
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Quote:
Originally Posted by toddalin View Post
Shouldn't we see the lighting flash..., then hear the thunder a few moments later?
Depends upon distance.
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Old 04-23-2017, 07:00 AM   #17 (permalink)
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Right you are, Dwight - sound travels about 1100 feet / sec at sea level so a lightning bolt 1 mile away would not be heard for 5 seconds or so.

My thoughts on the Harry Potter layout is that the wizards are fooling around in the castle so the lightning is being generated in the castle and the observer is a short distance away so there is no delay.

I have given some thought to adding a delay but it would require additional hardware (perhaps a 2nd processor) to keep track of the delay while the main processor watched for sound events. I may add that to the list of "things to do"!

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Old 06-27-2018, 09:46 AM   #18 (permalink)
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Must say I've never seen lightning and heard thunder at the same time, they are always a little time apart from each other.

And my living in the lightning capital of the US I've seen and heard more than enough to know, they never occur at the same exact moment.

Always a delay of either a second or two, sometimes the delay can be anywhere from 5 upwards to 45+ seconds after the flash/strike, and that's with a lightning bolt hitting right outside my house too!

Thunder after the flash is about as random as you can get.

Cool effect for what it does.
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Old 06-27-2018, 10:23 AM   #19 (permalink)
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Quote:
Originally Posted by Cataptrra View Post
Must say I've never seen lightning and heard thunder at the same time, they are always a little time apart from each other.

And my living in the lightning capital of the US I've seen and heard more than enough to know, they never occur at the same exact moment.

Always a delay of either a second or two, sometimes the delay can be anywhere from 5 upwards to 45+ seconds after the flash/strike, and that's with a lightning bolt hitting right outside my house too!

Thunder after the flash is about as random as you can get.

Cool effect for what it does.

Agreed - I did work on doing such a delay but the microcontroller that I used doesn't have the horsepower to do such a store & delay function. Perhaps an upgrade at some future time.
For what it is worth, the installation in the castle at Children's hospital has been very well received even without the delay -

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