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Author Topic: Simple accurate clock pulse source from an ordinary quartz clock  (Read 2205 times)

Offline spidamang

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Simple accurate clock pulse source from an ordinary quartz clock
« on: March 06, 2008, 01:24:39 PM »

http://www.sas.org/tcs/weeklyIssues_2006/2006-10-20/project1p/index.html

http://www.josepino.com/circuits/index?one_second_timebase.jpc

For anyone interested in making digital clocks without having to worry about calibrating your clock circuit in an oscilloscope.

What do you think guys?  ;D
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Simple accurate clock pulse source from an ordinary quartz clock
« on: March 06, 2008, 01:24:39 PM »

Offline 'yus

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Re: Simple accurate clock pulse source from an ordinary quartz clock
« Reply #1 on: March 06, 2008, 01:45:28 PM »
1Hz lang pala ito..
quartz crystal ba yung parang maliit na capacitor?  ???
kung crystal nga yun, pwede kayang gawin syang clock/oscillator ng mga PIC?  ???
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Re: Simple accurate clock pulse source from an ordinary quartz clock
« Reply #1 on: March 06, 2008, 01:45:28 PM »

Offline Born2BeWired

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Re: Simple accurate clock pulse source from an ordinary quartz clock
« Reply #2 on: March 06, 2008, 01:56:14 PM »
The quartz crystal is the one overhanging from the PCB side ;)

And yes, even this cheap COB (Chip on Board, - the black blob at the center of the PCB) based board is capable of giving accurate 1 Hz time base.

OK ito! :D
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Re: Simple accurate clock pulse source from an ordinary quartz clock
« Reply #2 on: March 06, 2008, 01:56:14 PM »

Offline zer0w1ng

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Re: Simple accurate clock pulse source from an ordinary quartz clock
« Reply #3 on: March 06, 2008, 02:18:17 PM »
This is nice!
Where can we buy this boards? Just from broken clocks?
Anyway, everybody here should have at least one broken clocks.
At home, I may have 2 on my junk box :) .
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Re: Simple accurate clock pulse source from an ordinary quartz clock
« Reply #3 on: March 06, 2008, 02:18:17 PM »

Offline spidamang

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Re: Simple accurate clock pulse source from an ordinary quartz clock
« Reply #4 on: March 06, 2008, 02:36:10 PM »
They're just for 1 hz pulse though. So basic h/m/s clock circuits is the only use I can think of. I've got a few broken clocks of my own too.  ;D
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Re: Simple accurate clock pulse source from an ordinary quartz clock
« Reply #4 on: March 06, 2008, 02:36:10 PM »

Offline razalas

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Re: Simple accurate clock pulse source from an ordinary quartz clock
« Reply #5 on: March 06, 2008, 04:20:08 PM »
Nice... Pwedeng pwede ito sa logic IC based frequency counter.... :)
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Online Shey

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Re: Simple accurate clock pulse source from an ordinary quartz clock
« Reply #6 on: March 06, 2008, 09:15:27 PM »
32.768 Khz ang frequency ng mga Clock crytals na yan tapos deni-divide nila yan hanggang maging 1 Hz. Bili ka nung cheapo na alarm clock sa mga sidewalk at kahoyan mo.  ;D
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Offline RiDdLeR???

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Re: Simple accurate clock pulse source from an ordinary quartz clock
« Reply #7 on: March 06, 2008, 09:33:37 PM »
Eto PIC version.  According to the thread, its just code and compatible with any PIC that has a CCP module.
Link: http://www.mikroe.com/forum/viewtopic.php?t=13499&highlight=clock+pulse

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Offline marcelino

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Re: Simple accurate clock pulse source from an ordinary quartz clock
« Reply #8 on: May 28, 2010, 11:16:49 PM »
up ko lang para sa mga gagawa ng digital circuits...
especially sa mga gagawa ng digital clock as project!
typical school project for digital circuits subject. ;D ;D ;D
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Offline ditchie

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Re: Simple accurate clock pulse source from an ordinary quartz clock
« Reply #9 on: June 26, 2011, 05:11:36 PM »
nagamit ko na ito sa heartbeat monitor project namin nung coolege day pa.. ganda kasi accurate siya, pinalitan ko yung 55based timer namn..
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Re: Simple accurate clock pulse source from an ordinary quartz clock
« Reply #10 on: January 04, 2012, 06:25:03 PM »
subscraybing!
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Offline dummy_c

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Re: Simple accurate clock pulse source from an ordinary quartz clock
« Reply #11 on: January 04, 2012, 06:28:10 PM »
Pa subs din... +1 TS. Kajit matagal na. ;D
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Re: Simple accurate clock pulse source from an ordinary quartz clock
« Reply #11 on: January 04, 2012, 06:28:10 PM »
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