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Topic: This annoying alarm clock project - lack of inputs. (Read 4828 times) previous topic - next topic


You are quite correct.  Gray Code (as it is known) is a minimum of 2 bits wide.


They could be 1-bit if you don't care about direction. Otherwise you're right, 2 or more is needed.

Rob Gray aka the GRAYnomad www.robgray.com


A rotary switch - to call it - would need two inputs, right?

The rotary encoder I use can replace with two switches. Each click rotating the encoder is equivalent to a button push.
Actually, the second version of the same clock
uses just one button to simulate an encoder that rotates one way.



I shall have to work out how to talk to you  directly.

My "clock project" is coming on quite well.  Though "Liudr" is being painful with his slow replies; not helping.

Anyway, when I get time to work out how to get in touch with you directly - or not via the forum -  I shall.

Some of my clock functions are "out there" and are actually useful.  Well, to me anyway.



They could be 1-bit if you don't care about direction. Otherwise you're right, 2 or more is needed.


A 1-bit rotary encoder has a special name - it's called a "button" :P


Rob Gray aka the GRAYnomad www.robgray.com


Jun 28, 2012, 12:46 pm Last Edit: Jun 28, 2012, 01:06 pm by Riva Reason: 1
I'm not sure what you want all these buttons to do with regard to your clock but I built a clock that uses this encoder using only 3 I/O pins to set hours, minutes, day, month, year, day of week & daylight saving.
Don't PM me for help as I will ignore it.


That infrared idea sounds like the easiest expansion, you can get a remote with a hundred buttons and. All the arduino uses is one pin,
or have it that after a certain setup period the buttons change function

The Clever Monkey

But they can't be ONE bit can they?

No, they can be one bit if all you want is rotation velocity without direction or a known start point.
I yield() for co-routines.



Not wanting to sound difficult, could you attach those files?

Are they "libraries"?

I actually may need those functions - it is amazing how many new functions I have thought of for my clock.


could you attach those files

Just copy and paste them into text files (with notepad, if you are on windows). Name the files CButton.h and CButton.cpp respectively. It really does not get simpler than this.
Are they "libraries"?

I don't think so (at least not according to my definition for library). They are just source files defining a C++ class. You use them as you would use the DS1307 "library": include the header in your own PDE, instantiate the class (create object), then use it the instance to call functions. As I said, follow the way the DS1307 class is used.



"It really does not get simpler than this"

Yeah, welll, no comment.

I know jack about C and am quite amazed how much I have "done" with the code.

I shall get the two files as you said and talk to someone face to face this weekend and maybe learn how it all works.

But thanks.


Another question:

Does anyone actually have/use this code?  As in the original.

The code has provisions for 4 alarms and there are four modes:
Week day,
Week end,

Now this "ONCE" mode has me stumped.

Where - in the code - is the alarm "Cleared" once the given time is passed?

Why I am asking is that I have played with this a couple of times and found the alarm is still set as active.

It doesn't re-trigger in 24 hours time, but I suspect it will trigger again.
I actually think it did once trigger 24 hours later.

In my modified code there are symbols indicating if an alarm is "active".  That is done by the "DOW" byte set.  That is read from the EEOROM.

I have found in the code where the "DOW" is cleared in the program, but it doesn't clear the DOW in the EEPROM.

So to me it implies that the alarm is going to activate again at some time.  I am suspicious it would be in 7 days timme, bu tit could be 24 hours too.   Not enough testing happened as yet.




So how do I "use" these classes?

Do I have to "include" them or do I actually have to put the code in my sketches?


Take a look at the code (file SillyClock.pde):
Cut just the alarm clock logic, with the state machine and stuff. The hardware-specific part may not be suitable for your hardware (unless you used the exact schematic I used).

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