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David Ashton
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Re: Analog meters
David Ashton   8/20/2014 4:28:48 PM
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@Max...seconds...you used to be able to get 270 degree meters which would be nice for that....any of those in your stash?  They were common in car gauges.



Max The Magnificent
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Re: Chimes
Max The Magnificent   8/20/2014 4:27:07 PM
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@David: ....or get one of those old "ding-dong" doorbells and fire it up on the hour....

I'm thinking more like on the hour you hear the sound of creaky clockwork turning, and things sliding and graunching and suchlike -- something that goes on and on -- then cumulates in a soft, sweet "ping"

Max The Magnificent
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Re: Analog meters
Max The Magnificent   8/20/2014 4:25:18 PM
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@David: Are you going to make custom scales for them?

Bet your booty -- it's hard to tell the time when the big dial's faceplate presents values in Ohms and the two medium meters show volts and amps LOL -- watch for my column tomorrow on this...

David Ashton
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Re: Chimes
David Ashton   8/20/2014 4:24:01 PM
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....or get one of those old "ding-dong" doorbells and fire it up on the hour....

Max The Magnificent
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Re: Analog meters
Max The Magnificent   8/20/2014 4:23:42 PM
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@David: I'd stick to a maximum of 12 things on a meter (in this case hours) because otherwise you'll have to get very close to read them easily.

This is something I'm going to have to look at -- in the case on minutes and seconds I'll need to go up to sixty -- but I might have major lines on the graticule every 10 units with minor lines betweeen them for every unit.

Max The Magnificent
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Re: Analog meters
Max The Magnificent   8/20/2014 4:21:41 PM
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@David: I'd imagine you are going to drive the meters with PWM at a frequency which won't show on the meter ballistics?

That's right -- PWM is the way to go -- in fact I'll be writing a blog on this in a couple of weeks -- explaining how you work with different meters that were originally intended to display voltage, current, resistance -- and different orders of magnitude -- and so forth...

Max The Magnificent
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Re: Analog meters
Max The Magnificent   8/20/2014 4:19:22 PM
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@David: I was going to suggest a centre-zero meter (I might even have one for you if you want)...

That's very kind of you, but I picked a couple up as part of my "stash" -- now I'm trying to worjk out how to use them. The thing is that, using the MCU to drive it, I can make a regulat meter "look" like a center-zero meter...

zeeglen
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Chimes
zeeglen   8/20/2014 4:18:41 PM
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Interesting idea, will be nice to see the finished project. Maybe you could find an old GC-1195 (Heathkit clock) on ebay and salvage the "Big Ben" chimes synthesizer board as well as the tic toc.  Or build your own Big Ben sound generator.

Max The Magnificent
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Re: Analog meters
Max The Magnificent   8/20/2014 4:17:11 PM
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@David: I love the idea of using a metronome-type meter to tick the seconds.

Me too -- that will give it some real visual interest

 

Max The Magnificent
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Re: Very nice!
Max The Magnificent   8/20/2014 4:15:23 PM
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@Duane: Now, if you could only include one of these CRT meters...

I have something even better to go on the top -- but I didn't want to give everything away all at once...

 

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