Simple accurate clock pulse source from an ordinary quartz clock

[spidamang]

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? 

['yus]

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? 

[Born2BeWired]

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!

[zer0w1ng]

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 .

[spidamang]

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. 

[razalas]

Nice... Pwedeng pwede ito sa logic IC based frequency counter....

[Ate Shey]

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. 

[alyas]

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

[marcelino]

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.

[ditchie]

nagamit ko na ito sa heartbeat monitor project namin nung coolege day pa.. ganda kasi accurate siya, pinalitan ko yung 55based timer namn..

[Ngarus!]

subscraybing!

[dummy_c]

Pa subs din... +1 TS. Kajit matagal na.