Design Con 2015
Breaking News
Comments
Newest First | Oldest First | Threaded View
<<   <   Page 9 / 14   >   >>
DrFPGA
User Rank
Blogger
Re: What no Sun Dial
DrFPGA   8/21/2014 6:35:20 PM
NO RATINGS
and it works in the dark too!

David Ashton
User Rank
Blogger
Re: What no Sun Dial
David Ashton   8/21/2014 4:56:46 PM
NO RATINGS
@Crusty...GREAT idea.  You could have a curved line of RGB LEDs some distance above the sundial to simulate the sun, clear ones that have a narrow beam. and illuminate them one at a time, changing every 10 minutes or so (this implies 72 LEDs for 12 hours) and use one colour for day and another for night.  Wouldn't need any motors, just some electronics to drive the LEDS.  Since your LEDs would be fixed you wouldn't need to compensate for the seasons either...

Max The Magnificent
User Rank
Blogger
Re: Sorry to have missed it
Max The Magnificent   8/21/2014 4:31:01 PM
NO RATINGS
@mhrackin: I'll be retired by then and would definitely be up for a road trip.

Antedeluvian's idea is sound -- we could all make our way there -- have a happy time at the Hamfest, and spend a couple of days all going round the local museums together.

Max The Magnificent
User Rank
Blogger
Re: Sorry to have missed it
Max The Magnificent   8/21/2014 4:29:38 PM
NO RATINGS
@Antedeluvian: Looks like Dayton is about 7 hrs from Toronto. Maybe you should organize an EELive Get-Together. Good museum (National Museum of USAF) as well, or so I'm told.

Maybe we should at that ... let me think about it...

Max The Magnificent
User Rank
Blogger
Re: Very nice!
Max The Magnificent   8/21/2014 4:28:46 PM
NO RATINGS
@Duane: Or, maybe something with Neopixels.

I wouldn't dream of doing a project without them -- I have a perfectly sized-shaped vacuum tube to sit on the top of thsi clock with NeoPixels underneath it...

Max The Magnificent
User Rank
Blogger
Re: Magic Eye Tube?
Max The Magnificent   8/21/2014 4:27:05 PM
NO RATINGS
@mhrackin: Is that your "secret ingredient" to go up top center?

Actually, I have something else in mind, but I might have to add one of these also...

Max The Magnificent
User Rank
Blogger
Re: What no Sun Dial
Max The Magnificent   8/21/2014 4:25:46 PM
NO RATINGS
@Crusty: ...I think this might just end up on my whacky to do list...

Hi Crusty -- this is actually a really nice little project -- simple in some respects, not-so-simple in others, and the final result can look really fantastic if you do the case right.

Max The Magnificent
User Rank
Blogger
Re: Timeofdayometer
Max The Magnificent   8/21/2014 4:23:46 PM
NO RATINGS
@HeyJoe0: Another issue was that, although I used a 32.768KHz xtal timebase, my time would drift.

I'm planning on using a real-time clock module in mine -- that makes life much easier :-)

Max The Magnificent
User Rank
Blogger
Re: Timeofdayometer
Max The Magnificent   8/21/2014 4:22:27 PM
NO RATINGS
@HeyJoe: I built an analog timeofdayometer...

I like your siolution of displaying hours 1-6 and then 7-12 with minutes inbetween.

Another solution might be to have a "rest" position on the left and then hours 1-12 and minutes 1-60 shown as concentric scales. The needle could start off in the "rest" position -- then move to indicate the hour -- then move to indicate the minute -- then return to the rest position...

 

Max The Magnificent
User Rank
Blogger
Re: Timeofdayometer
Max The Magnificent   8/21/2014 4:19:14 PM
NO RATINGS
@HeyJoe: ...On my next iteration Im going to use a linear scale and apply a nonlinear correction factor on my output value.

That's something I might be doing -- alternatively, for some ptojects I might want a non-linear scale that doesn;t match the non-linerarity of the meter. In thsi case I might use a look-up table approach and then interpolate between table values.

<<   <   Page 9 / 14   >   >>


Top Comments of the Week
Flash Poll
Like Us on Facebook

Datasheets.com Parts Search

185 million searchable parts
(please enter a part number or hit search to begin)
EE Life
Frankenstein's Fix, Teardowns, Sideshows, Design Contests, Reader Content & More
Carlos Bueno

Adventures in Userland
Carlos Bueno
Post a comment
Editor’s Note: Excerpted from Lauren Ipsum: A story about computer science and other improbable things, author Carlos Bueno introduces us to Lauren and her adventures in ...

Max Maxfield

Tired Old iPad 2 vs. Shiny New iPad Air 2
Max Maxfield
9 comments
I remember when the first iPad came out deep in the mists of time we used to call 2010. Actually, that's only four years ago, but it seems like a lifetime away -- I mean; can you remember ...

Martin Rowe

Make This Engineering Museum a Reality
Martin Rowe
Post a comment
Vincent Valentine is a man on a mission. He wants to make the first house to ever have a telephone into a telephone museum. Without help, it may not happen.

Rich Quinnell

Making the Grade in Industrial Design
Rich Quinnell
16 comments
As every developer knows, there are the paper specifications for a product design, and then there are the real requirements. The paper specs are dry, bland, and rigidly numeric, making ...

Special Video Section
The LT8640 is a 42V, 5A synchronous step-down regulator ...
The LTC2000 high-speed DAC has low noise and excellent ...
How do you protect the load and ensure output continues to ...
General-purpose DACs have applications in instrumentation, ...
Linear Technology demonstrates its latest measurement ...
10:29
Demos from Maxim Integrated at Electronica 2014 show ...
Bosch CEO Stefan Finkbeiner shows off latest combo and ...
STMicroelectronics demoed this simple gesture control ...
Keysight shows you what signals lurk in real-time at 510MHz ...
TE Connectivity's clear-plastic, full-size model car shows ...
Why culture makes Linear Tech a winner.
Recently formed Architects of Modern Power consortium ...
Specially modified Corvette C7 Stingray responds to ex Indy ...
Avago’s ACPL-K30T is the first solid-state driver qualified ...
NXP launches its line of multi-gate, multifunction, ...
Doug Bailey, VP of marketing at Power Integrations, gives a ...
See how to ease software bring-up with DesignWare IP ...
DesignWare IP Prototyping Kits enable fast software ...
This video explores the LT3086, a new member of our LDO+ ...
In today’s modern electronic systems, the need for power ...