Comments on: Cheap 1 Hz clock source http://hackaday.com/2007/02/04/cheap-1-hz-clock-source/ Fresh hacks every day Fri, 10 Feb 2012 14:02:57 +0000 hourly 1 http://wordpress.com/ By: sagar http://hackaday.com/2007/02/04/cheap-1-hz-clock-source/comment-page-1/#comment-24751 Sat, 14 Jun 2008 17:23:06 +0000 http://hackaday.iheartcashews.com:8181/2007/02/04/cheap-1-hz-clock-source/#comment-24751 kool!!!!, never thot f it

]]> By: Alexandre Abdela http://hackaday.com/2007/02/04/cheap-1-hz-clock-source/comment-page-1/#comment-24750 Wed, 14 Feb 2007 02:52:24 +0000 http://hackaday.iheartcashews.com:8181/2007/02/04/cheap-1-hz-clock-source/#comment-24750 It’s actually possible to drive ttl with this unit but don’t use the actual output since it’s only about .3 to .9 volts with a 5 volt input. You need to get a clock with an alarm… the dollar store has them. now using the same circuit, unsolder the small buzzer noting down the polarities, connect a zener diode on the plus side and connect the other end to a 100 ohm resistor added in series to the 1K resistor, now there is an extra leed in the PC board to control the alarm
it is activated by connecting it to the negative of your 5 vlt DC. that gives you 6 controled pulses a second at 4.3 vlts dc. Now that, connected to a 4 bit couter like the 74ls393 will hold a steady output. Use a differant power supply for the ttl to avoid resonnance. Pictures of unit available on request.

]]> By: strider_mt2k http://hackaday.com/2007/02/04/cheap-1-hz-clock-source/comment-page-1/#comment-24749 Wed, 07 Feb 2007 14:04:07 +0000 http://hackaday.iheartcashews.com:8181/2007/02/04/cheap-1-hz-clock-source/#comment-24749 Quite silly, but I love the absurd.

]]> By: n3rrd http://hackaday.com/2007/02/04/cheap-1-hz-clock-source/comment-page-1/#comment-24748 Tue, 06 Feb 2007 05:08:34 +0000 http://hackaday.iheartcashews.com:8181/2007/02/04/cheap-1-hz-clock-source/#comment-24748 He used an old wall clock, #10.

]]> By: ... http://hackaday.com/2007/02/04/cheap-1-hz-clock-source/comment-page-1/#comment-24747 Tue, 06 Feb 2007 04:34:20 +0000 http://hackaday.iheartcashews.com:8181/2007/02/04/cheap-1-hz-clock-source/#comment-24747 Actually he used a full sized clock.

An analog wristwatch should work fine, although you might need to use a small npn transistor to get enough current to run a LED. Don’t even think about trying to use a digital…

]]> By: triikan http://hackaday.com/2007/02/04/cheap-1-hz-clock-source/comment-page-1/#comment-24746 Tue, 06 Feb 2007 04:07:53 +0000 http://hackaday.iheartcashews.com:8181/2007/02/04/cheap-1-hz-clock-source/#comment-24746 #9: That’s what he did. He took the quartz clock out of a cheap watch and rewired it to provide a pulse every second to his circuit (which is what the quartz clock does in a watch, so he basically just stripped it down and hacked it into a new circuit, neat).

]]> By: rugelin dinda http://hackaday.com/2007/02/04/cheap-1-hz-clock-source/comment-page-1/#comment-24745 Tue, 06 Feb 2007 01:31:02 +0000 http://hackaday.iheartcashews.com:8181/2007/02/04/cheap-1-hz-clock-source/#comment-24745 What about hacking a wristwacht clock for the same porpose? Is it easy or difficult one?

]]> By: Jakeh http://hackaday.com/2007/02/04/cheap-1-hz-clock-source/comment-page-1/#comment-24744 Tue, 06 Feb 2007 01:19:11 +0000 http://hackaday.iheartcashews.com:8181/2007/02/04/cheap-1-hz-clock-source/#comment-24744 Ahh, this is the kind of thing that made me fall in love with HAD so many years ago. Nothing in the world quite like repurposed technology :D

]]> By: evandude http://hackaday.com/2007/02/04/cheap-1-hz-clock-source/comment-page-1/#comment-24743 Mon, 05 Feb 2007 22:11:29 +0000 http://hackaday.iheartcashews.com:8181/2007/02/04/cheap-1-hz-clock-source/#comment-24743 A pretty good use of a precision 1Hz clock source would be if you are building a digital alarm clock, or any other device that you would like to keep accurate time over long durations, like a datalogger, etc. Even an error of as small as 0.07% corresponds to a minute a day gained/lost, so it’s pretty easy to see how badly a 555 would do in that situation.

]]> By: Kevin http://hackaday.com/2007/02/04/cheap-1-hz-clock-source/comment-page-1/#comment-24742 Mon, 05 Feb 2007 21:53:12 +0000 http://hackaday.iheartcashews.com:8181/2007/02/04/cheap-1-hz-clock-source/#comment-24742 Great idea for if you want to make an binary clock or something of the sort, would help keep accurate time.

]]> By: nitro2k01 http://hackaday.com/2007/02/04/cheap-1-hz-clock-source/comment-page-1/#comment-24741 Mon, 05 Feb 2007 21:30:35 +0000 http://hackaday.iheartcashews.com:8181/2007/02/04/cheap-1-hz-clock-source/#comment-24741 I dn’t really see the use, unless you happen to have a clock lying around at home.
This can be achieved pretty easily with an opamp (50/50 duty cycle) or a 555 (Any duty cycle)
I don’t really see the use of a quartz precision 1 Hz clock source.
But on the other hand, if you have the parts in your hands, why not.

]]> By: Timberley http://hackaday.com/2007/02/04/cheap-1-hz-clock-source/comment-page-1/#comment-24740 Mon, 05 Feb 2007 20:57:26 +0000 http://hackaday.iheartcashews.com:8181/2007/02/04/cheap-1-hz-clock-source/#comment-24740 The beacon idea is really silly. But the hack seems nice. This is the kind of projects this website needs! It’s:
-easy to rebuild
-useful in many projects
-relatively harmless
-not so easy that everybody already had that idea
-a hack instead of just a stupid mod
Unfortunately it’s not new. Well…

]]> By: strider_mt2k http://hackaday.com/2007/02/04/cheap-1-hz-clock-source/comment-page-1/#comment-24739 Mon, 05 Feb 2007 17:12:23 +0000 http://hackaday.iheartcashews.com:8181/2007/02/04/cheap-1-hz-clock-source/#comment-24739 That is clever!

A few years ago I was considering making a series if flashing IR beacons to be dropped by my wheeled ROV as a “trail of breadcrumbs” low-tech system to help me navigate the ROV back to my home using cameras on board the vehicle.
This application would be great for something like that!

]]> By: RusH http://hackaday.com/2007/02/04/cheap-1-hz-clock-source/comment-page-1/#comment-24738 Mon, 05 Feb 2007 16:06:36 +0000 http://hackaday.iheartcashews.com:8181/2007/02/04/cheap-1-hz-clock-source/#comment-24738 Why do you post pictures of BOMBS* on your site? City of Boston will close you down for sure!

*
circuit board – check
led – check
blinks – check
wires – check

]]> By: p http://hackaday.com/2007/02/04/cheap-1-hz-clock-source/comment-page-1/#comment-24737 Mon, 05 Feb 2007 10:39:07 +0000 http://hackaday.iheartcashews.com:8181/2007/02/04/cheap-1-hz-clock-source/#comment-24737 if you don’t have a spare clock an M34-1(3321) LED FLASHER CHIP 1HZ may be handy.

http://www.rapidonline.com/netalogue/specs/82-0030e.pdf

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