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Can't find 60Hz Oscilator!

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Lac

New Member
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

New Member
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 :D , but will it work?

Thanks!
Lac.
 

Sebi

Active Member
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

New Member
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.)
 

Lac

New Member
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

New Member
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

New Member
For a stable 60 hz use this circuit:
 

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Nigel Goodwin

Super Moderator
Most Helpful Member
Lac said:
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

New Member
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.
 

Lac

New Member
nope, I live in Norway, here we have 230v 50~60Hz , not accurate. But thanks A LOT for all the help i have recived, I have learnt incredibly much from it.

Cheers!
Lac.
 
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