Can't find 60Hz Oscilator! - Electronic Circuits Projects Diagrams Free

Lac · 23rd March 2004, 07:53 PM

I'm about building a digital clock, and I have read that I need a 60Hz Oscilator, but I cant seem to find oscilators that low! Every oscilator is rated in MHz not Hz. I only find 60MHz , do the producer mean that 60Hz and 60MHz are the same? Can I use a 60MHz oscilator instead?

Thanks!
Lac.

Lac · 23rd March 2004, 09:00 PM

hmm.. but what if I buy a clockcrystal (32KHz) and then buy 5 decade counters and then devide the frequency down to 1Hz? (32000/10/10/10/4/8=1Hz) weird idea

, but will it work?

Thanks!
Lac.

Russlk · 23rd March 2004, 09:59 PM

That is the way to do it, but you can do it with one binary counter and some decoding.

Sebi · 23rd March 2004, 10:02 PM

What You need exactly 60Hz or 1Hz? Some alarm clock chips need 60Hz clk freq. 60 MHz (or 6 or 3MHz) quartz and decade counters is a good choice. 32768kHz Xtals most of case cheap, but low quality.

Lac · 24th March 2004, 02:46 PM

Serious? Is that the way to do it? buying 5 decade counters and devide it down? But I have limited space for the chips (ca. 2x2") aren't there any other way to do it?

These chips wil drive 4 LED-Displays that contain 4-6 elemts each. So they will drive ca. 16 displays ( four digital clocks that run simously.)

udi_hakim · 24th March 2004, 03:01 PM

You should get an ic like the CD4060...

Lac · 24th March 2004, 03:10 PM

What about this one then?

http://www.maxim-ic.com/quick_view2.cfm/qv_pk/4226

Sebi · 24th March 2004, 04:31 PM

Interesting chip, but cannot produce 60Hz....

Lac · 24th March 2004, 05:50 PM

Quote:

Output Frequencies Independently Programmable from 0.25Hz to 1.048MHz

Can't it?

Russlk · 24th March 2004, 08:26 PM

one hz is a possible output but not 60 hz.

Lac · 24th March 2004, 09:30 PM

Quote:

one hz is a possible output but not 60 hz.

why?

What about using a 555timer IC? but I can't seem to figure out wich combination of resistors and capacitor to use to get 1Hz output. help?

Cheers!
Lac.

nettron1000 · 24th March 2004, 10:39 PM

Or use a MM5369 IC as the 60 Hz source, these are very accurate and use a commonly available 3.58 Mhz TV colorburst crystal.

Russlk · 24th March 2004, 10:41 PM

For a stable 60 hz use this circuit:

**Nigel Goodwin** · 24th March 2004, 11:17 PM

Quote:

Originally Posted by Lac

What about using a 555timer IC? but I can't seem to figure out wich combination of resistors and capacitor to use to get 1Hz output. help?

It would work, but wouldn't be very accurate - a free running oscillator isn't much use for a clock! (think + or - one hour per week!).

DemonRising · 28th March 2004, 07:00 PM

if you live in the states, you can get the 60Hz from the outlet. edison doesnt guarantee 120V, but they do guarantee 60Hz. with a bit of circuitry, you can get a 60Hz squarewave. if you live in an area that supplies 50Hz, then perhaps a 555 timer with a trim pot would work for you. some companies used to have 60hz time-base generator ic's. may have discontinued them. perhaps you can find a place that specializes in hard to find ic's.

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23rd March 2004, 07:53 PM	(permalink)
Lac	Can't find 60Hz Oscilator! I'm about building a digital clock, and I have read that I need a 60Hz Oscilator, but I cant seem to find oscilators that low! Every oscilator is rated in MHz not Hz. I only find 60MHz , do the producer mean that 60Hz and 60MHz are the same? Can I use a 60MHz oscilator instead? Thanks! Lac.

23rd March 2004, 09:00 PM	(permalink)
Lac	hmm.. but what if I buy a clockcrystal (32KHz) and then buy 5 decade counters and then devide the frequency down to 1Hz? (32000/10/10/10/4/8=1Hz) weird idea , but will it work? Thanks! Lac.

23rd March 2004, 09:59 PM	(permalink)
Russlk	That is the way to do it, but you can do it with one binary counter and some decoding. __________________ see my website: www.geocities.com/russlk

23rd March 2004, 10:02 PM	(permalink)
Sebi	What You need exactly 60Hz or 1Hz? Some alarm clock chips need 60Hz clk freq. 60 MHz (or 6 or 3MHz) quartz and decade counters is a good choice. 32768kHz Xtals most of case cheap, but low quality.

24th March 2004, 02:46 PM	(permalink)
Lac	Serious? Is that the way to do it? buying 5 decade counters and devide it down? But I have limited space for the chips (ca. 2x2") aren't there any other way to do it? These chips wil drive 4 LED-Displays that contain 4-6 elemts each. So they will drive ca. 16 displays ( four digital clocks that run simously.)

24th March 2004, 03:01 PM	(permalink)
udi_hakim	You should get an ic like the CD4060...

24th March 2004, 03:10 PM	(permalink)
Lac	What about this one then? http://www.maxim-ic.com/quick_view2.cfm/qv_pk/4226

24th March 2004, 04:31 PM	(permalink)
Sebi	Interesting chip, but cannot produce 60Hz....

24th March 2004, 08:26 PM	(permalink)
Russlk	one hz is a possible output but not 60 hz. __________________ see my website: www.geocities.com/russlk

24th March 2004, 10:39 PM	(permalink)
nettron1000	Or use a MM5369 IC as the 60 Hz source, these are very accurate and use a commonly available 3.58 Mhz TV colorburst crystal. __________________ Two roads diverged into a woods...i took the one less travelled by. R. Frost.

28th March 2004, 07:00 PM	(permalink)
DemonRising	if you live in the states, you can get the 60Hz from the outlet. edison doesnt guarantee 120V, but they do guarantee 60Hz. with a bit of circuitry, you can get a 60Hz squarewave. if you live in an area that supplies 50Hz, then perhaps a 555 timer with a trim pot would work for you. some companies used to have 60hz time-base generator ic's. may have discontinued them. perhaps you can find a place that specializes in hard to find ic's. __________________ What\'s the worst thing that can happen?