Can't find 60Hz Oscilator!

L

Lac

New Member

• Mar 23, 2004

• #1

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.

 

L

Lac

New Member

• Mar 23, 2004

• #2

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.

 

R

Russlk

New Member

• Mar 23, 2004

• #3

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

 

Sebi

Active Member

• Mar 23, 2004

• #4

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.

 

L

Lac

New Member

• Mar 24, 2004

• #5

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

New Member

• Mar 24, 2004

• #6

You should get an ic like the CD4060...

 

L

Lac

New Member

• Mar 24, 2004

• #7

What about this one then?

**broken link removed**

 

Sebi

Active Member

• Mar 24, 2004

• #8

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

 

L

Lac

New Member

• Mar 24, 2004

• #9

Output Frequencies Independently Programmable from 0.25Hz to 1.048MHz

Click to expand...

Can't it?

 

R

Russlk

New Member

• Mar 24, 2004

• #10

one hz is a possible output but not 60 hz.

 

L

Lac

New Member

• Mar 24, 2004

• #11

one hz is a possible output but not 60 hz.

Click to expand...

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.

 

N

nettron1000

New Member

• Mar 24, 2004

• #12

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.

 

R

Russlk

New Member

• Mar 24, 2004

• #13

For a stable 60 hz use this circuit:

 

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Nigel Goodwin

Super Moderator

Most Helpful Member

• Mar 24, 2004

• #14

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?

Click to expand...

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!).

 

D

DemonRising

New Member

• Mar 28, 2004

• #15

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.

 

L

Lac

New Member

• Mar 28, 2004

• #16

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.