Comments on: How-To: Binary clock using a Freeduino SB 2.1 http://hackaday.com/2008/06/06/how-to-binary-clock-using-a-freeduino-sb-21/ Fresh hacks every day Fri, 10 Feb 2012 15:30:41 +0000 hourly 1 http://wordpress.com/ By: Jason Alverez http://hackaday.com/2008/06/06/how-to-binary-clock-using-a-freeduino-sb-21/comment-page-1/#comment-121757 Wed, 03 Feb 2010 21:54:01 +0000 http://hackaday.iheartcashews.com:8181/2008/06/06/how-to-binary-clock-using-a-freeduino-sb-21/#comment-121757 Hi, just today found this blog but I have to say that it looks great. I totally agree with your post. Have a nice day, keep up the nice work and I’ll definitely keep reading.

]]> By: beamish http://hackaday.com/2008/06/06/how-to-binary-clock-using-a-freeduino-sb-21/comment-page-1/#comment-52646 Fri, 28 Nov 2008 19:25:25 +0000 http://hackaday.iheartcashews.com:8181/2008/06/06/how-to-binary-clock-using-a-freeduino-sb-21/#comment-52646 Nice article! I’m inspired!

]]> By: WestfW http://hackaday.com/2008/06/06/how-to-binary-clock-using-a-freeduino-sb-21/comment-page-1/#comment-36408 Sat, 07 Jun 2008 07:14:59 +0000 http://hackaday.iheartcashews.com:8181/2008/06/06/how-to-binary-clock-using-a-freeduino-sb-21/#comment-36408 BTW, as one of the people involved with the Freedunio project. I’d like to commend you on your exceptionally concise and accurate summary of the issues involved there!

]]> By: WestfW http://hackaday.com/2008/06/06/how-to-binary-clock-using-a-freeduino-sb-21/comment-page-1/#comment-36407 Sat, 07 Jun 2008 07:10:04 +0000 http://hackaday.iheartcashews.com:8181/2008/06/06/how-to-binary-clock-using-a-freeduino-sb-21/#comment-36407 The arduino clock tick is at 1.024ms, but the “millis()” function has some math that is supposed to correct for this, modulo round-off errors…

]]> By: ladyada http://hackaday.com/2008/06/06/how-to-binary-clock-using-a-freeduino-sb-21/comment-page-1/#comment-36406 Sat, 07 Jun 2008 04:48:50 +0000 http://hackaday.iheartcashews.com:8181/2008/06/06/how-to-binary-clock-using-a-freeduino-sb-21/#comment-36406 also, if you want to know how accurate a crystal is, its easy to calculate. most crystals in inexpensive projects have 50parts-per-million accuracy (although it can be as high as 100ppm) 30/1000000 = 0.003% accurate which is 166 x more accurate than a ceramic oscillator

]]> By: ladyada http://hackaday.com/2008/06/06/how-to-binary-clock-using-a-freeduino-sb-21/comment-page-1/#comment-36405 Sat, 07 Jun 2008 04:31:15 +0000 http://hackaday.iheartcashews.com:8181/2008/06/06/how-to-binary-clock-using-a-freeduino-sb-21/#comment-36405 you are probably having timekeeping problems because the code uses the arduino millis() which (last i checked) is 1.024 ms not 1.000ms thus you will always be fast by about 3% :)

you may also want to use a watch crystal – they’re designed just for this. i linked to an article on using one a boarduino (although you could do it with any sort of *duino) here: http://www.ladyada.net/rant/2008/04/add-a-watch-crystal-to-a-boarduino/

]]> By: bokubob http://hackaday.com/2008/06/06/how-to-binary-clock-using-a-freeduino-sb-21/comment-page-1/#comment-36404 Sat, 07 Jun 2008 02:48:33 +0000 http://hackaday.iheartcashews.com:8181/2008/06/06/how-to-binary-clock-using-a-freeduino-sb-21/#comment-36404 Your ‘radio controlled “atomic” clock’ probably only synchronizes itself once a day, so for your purposes it’s just a quartz clock; not that there’s anything wrong with that.

-Jonathan

]]> By: Tom http://hackaday.com/2008/06/06/how-to-binary-clock-using-a-freeduino-sb-21/comment-page-1/#comment-36403 Sat, 07 Jun 2008 02:11:42 +0000 http://hackaday.iheartcashews.com:8181/2008/06/06/how-to-binary-clock-using-a-freeduino-sb-21/#comment-36403 great write up, inspiring and to the point.

informative!

thank you

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