Comments on: Controlling a clock with an Arduino http://www.cibomahto.com/2008/03/controlling-a-clock-with-an-arduino/ building making designing dreaming Mon, 23 Jan 2012 17:12:35 +0000 hourly 1 http://wordpress.org/?v=3.0 By: Arduino boards control cheap clockworks via coil injection - Hack a Day http://www.cibomahto.com/2008/03/controlling-a-clock-with-an-arduino/comment-page-1/#comment-91964 Arduino boards control cheap clockworks via coil injection - Hack a Day Tue, 27 Sep 2011 17:02:20 +0000 http://www.cibomahto.com/?p=174#comment-91964 [...] inexpensive clockworks. The concept is quite simple, and perhaps best outlined by [Matt Mets'] article on the subject. As it turns out, these clockworks are driven by a coil, forming a device that is quite similar to [...] [...] inexpensive clockworks. The concept is quite simple, and perhaps best outlined by [Matt Mets'] article on the subject. As it turns out, these clockworks are driven by a coil, forming a device that is quite similar to [...]

]]> By: mahto http://www.cibomahto.com/2008/03/controlling-a-clock-with-an-arduino/comment-page-1/#comment-87560 mahto Tue, 26 Jul 2011 01:48:40 +0000 http://www.cibomahto.com/?p=174#comment-87560 Hey Francis, The extra circuit is a serial converter board to connect my Bare Bones Board Arduino to the computer for programming. I made it using a MAX232 chip, since I didn't have an FTDI cable at the time. Cheers, Matt Hey Francis,

The extra circuit is a serial converter board to connect my Bare Bones Board Arduino to the computer for programming. I made it using a MAX232 chip, since I didn’t have an FTDI cable at the time.

Cheers,
Matt

]]> By: francis http://www.cibomahto.com/2008/03/controlling-a-clock-with-an-arduino/comment-page-1/#comment-87523 francis Mon, 25 Jul 2011 10:35:33 +0000 http://www.cibomahto.com/?p=174#comment-87523 hey wat is that circuit connected to the arduino ?????not the clock the other ciruit with the chip?????????????? hey wat is that circuit connected to the arduino ?????not the clock the other ciruit with the chip??????????????

]]> By: mahto http://www.cibomahto.com/2008/03/controlling-a-clock-with-an-arduino/comment-page-1/#comment-61023 mahto Mon, 11 Oct 2010 22:14:02 +0000 http://www.cibomahto.com/?p=174#comment-61023 Yeah, this would certainly work, especially (as you noted) if you need the Arduino to do anything else at the same time. Yeah, this would certainly work, especially (as you noted) if you need the Arduino to do anything else at the same time.

]]> By: Dr. Bob Bob http://www.cibomahto.com/2008/03/controlling-a-clock-with-an-arduino/comment-page-1/#comment-60130 Dr. Bob Bob Sat, 02 Oct 2010 16:00:37 +0000 http://www.cibomahto.com/?p=174#comment-60130 You could avoid the whole issue with the milli function if you wrote your own timer interrupt. Basically the timer interrupt would fire at a precise interval and then you would count the number of timer interrupts and set a flag for the main to tick the clock. I am not sure how to setup interrupts on an arduino (I have much more experience with PICs) but I know it is possible. The interrupt body will be something like ticks++; if(ticks > TICKS_PER_SECOND) { clockPulse = true; ticks = 0; } The main loop will be while( true ) { if(clockPulse) { doTick(); clockPulse = false; } } This would also allow you to do other things with the main loop rather than just burn clock cycles. If you properly calculate the timer interrupt you will be able to have much more accurate time values. This will also be free of the 9 hour limit from the milis funciton which is caused by the overflow of a value. With this you will reset the ticks with every pulse of the clock so it won't have any overflow issues. You could avoid the whole issue with the milli function if you wrote your own timer interrupt. Basically the timer interrupt would fire at a precise interval and then you would count the number of timer interrupts and set a flag for the main to tick the clock. I am not sure how to setup interrupts on an arduino (I have much more experience with PICs) but I know it is possible.

The interrupt body will be something like
ticks++;
if(ticks > TICKS_PER_SECOND)
{
clockPulse = true;
ticks = 0;
}
The main loop will be
while( true )
{
if(clockPulse)
{
doTick();
clockPulse = false;
}
}

This would also allow you to do other things with the main loop rather than just burn clock cycles. If you properly calculate the timer interrupt you will be able to have much more accurate time values. This will also be free of the 9 hour limit from the milis funciton which is caused by the overflow of a value. With this you will reset the ticks with every pulse of the clock so it won’t have any overflow issues.

]]> By: Dave G http://www.cibomahto.com/2008/03/controlling-a-clock-with-an-arduino/comment-page-1/#comment-33354 Dave G Wed, 18 Nov 2009 16:01:21 +0000 http://www.cibomahto.com/?p=174#comment-33354 Hey this is what i have been looking for for a project im doing but im trying to use a pocket watch instead! Though im finding it really hard trying to find where i solder to! Any chance you give some pointers to a newbie who can do more software than hardware stuff :)? Dave Hey this is what i have been looking for for a project im doing but im trying to use a pocket watch instead! Though im finding it really hard trying to find where i solder to! Any chance you give some pointers to a newbie who can do more software than hardware stuff :) ?

Dave

]]> By: mahto http://www.cibomahto.com/2008/03/controlling-a-clock-with-an-arduino/comment-page-1/#comment-24708 mahto Tue, 16 Jun 2009 13:29:21 +0000 http://www.cibomahto.com/?p=174#comment-24708 Sweet! however, that doesn't sound like a 'cool' indicator at all :-D Sweet! however, that doesn’t sound like a ‘cool’ indicator at all :-D

]]> By: Peter Dekkers http://www.cibomahto.com/2008/03/controlling-a-clock-with-an-arduino/comment-page-1/#comment-24679 Peter Dekkers Tue, 16 Jun 2009 08:12:12 +0000 http://www.cibomahto.com/?p=174#comment-24679 Yay, works perfectly! I found that I had to up the delay in the doTick() function to suit my particular gear configuration, otherwise the clock would just jump erratically backwards and forwards. 16 milliseconds seems to be the sweet spot. Putting only a call to doTick() into the loop() function is fun, too. Makes the clock go quite fast. The second hand does about a revolution per second. And if you hold your finger in the way of the second hand, it makes the clock go backwards and forwards, changing direction each time it hits your finger. I'm thinking it could be a cool indicator. E.g. the warmer it gets, the faster the clock goes. Thanks again for the detailed write up :) Yay, works perfectly! I found that I had to up the delay in the doTick() function to suit my particular gear configuration, otherwise the clock would just jump erratically backwards and forwards. 16 milliseconds seems to be the sweet spot.

Putting only a call to doTick() into the loop() function is fun, too. Makes the clock go quite fast. The second hand does about a revolution per second. And if you hold your finger in the way of the second hand, it makes the clock go backwards and forwards, changing direction each time it hits your finger.

I’m thinking it could be a cool indicator. E.g. the warmer it gets, the faster the clock goes.

Thanks again for the detailed write up :)

]]> By: mahto http://www.cibomahto.com/2008/03/controlling-a-clock-with-an-arduino/comment-page-1/#comment-24630 mahto Mon, 15 Jun 2009 15:29:40 +0000 http://www.cibomahto.com/?p=174#comment-24630 Awesome! Be sure to post your results :-) Awesome! Be sure to post your results :-)

]]> By: Peter Dekkers http://www.cibomahto.com/2008/03/controlling-a-clock-with-an-arduino/comment-page-1/#comment-24609 Peter Dekkers Mon, 15 Jun 2009 05:27:25 +0000 http://www.cibomahto.com/?p=174#comment-24609 Bought a clock today, aiming to make the hands go nuts! Thanks for the inspiration and the electronic hobos. Bought a clock today, aiming to make the hands go nuts! Thanks for the inspiration and the electronic hobos.

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