Looking for a decade counter -or- divider ?...

[Arnie Dwyer]

Sid 03 <sidwelle@gmail.com> wrote:

Decade counter:
I am looking for a decade counter, I found some on-line like the 4017
and 74HC[T]390. But I am now sure any of those are what I want. At my
previous job we use to have quad decade counters in one chip available.
That has been a few years ago and not sure where to look now. What I
want to be able to do is tie at least two of them end to end and get a
divider of 10 and 100. Maybe the terminology is wrong and I should be
looking for a divider ?

Any help is appreciated.
Thanks

Tom Van Baak published a list of PIC counters that give various ratios,
such as 1e7 (10MHz to 1Hz) with jitter under 2ps. Here is a list with
source code:

picDIV -- Single Chip Frequency Divider
http://www.leapsecond.com/pic/picdiv.htm

PIC divider jitter measurement
http://www.leapsecond.com/pic/jitter/

He also posted a different version to time events:

picPET -- Precision Event Timer, more versions
http://leapsecond.com/pic/picpet2.htm

 

[Jan Panteltje]

On a sunny day (Sat, 29 Jan 2022 00:27:22 -0000 (UTC)) it happened Arnie Dwyer
<spamme@not.com> wrote in <XnsAE2DC5EADE5E9idtokenpost@144.76.35.252>:

Sid 03 <sidwelle@gmail.com> wrote:

Decade counter:
I am looking for a decade counter, I found some on-line like the 4017
and 74HC[T]390. But I am now sure any of those are what I want. At my
previous job we use to have quad decade counters in one chip available.
That has been a few years ago and not sure where to look now. What I
want to be able to do is tie at least two of them end to end and get a
divider of 10 and 100. Maybe the terminology is wrong and I should be
looking for a divider ?

Any help is appreciated.
Thanks

Tom Van Baak published a list of PIC counters that give various ratios,
such as 1e7 (10MHz to 1Hz) with jitter under 2ps. Here is a list with
source code:

picDIV -- Single Chip Frequency Divider
http://www.leapsecond.com/pic/picdiv.htm

PIC divider jitter measurement
http://www.leapsecond.com/pic/jitter/

He also posted a different version to time events:

picPET -- Precision Event Timer, more versions
http://leapsecond.com/pic/picpet2.htm

Sure, using Mircochip PICs much is possible
here my frequency counter in an RS232 connector, powered from the RS232 DTR::
http://panteltje.com/panteltje/pic/freq_pic/

But then he needs a PIC programmer etc...

I am sure an ebay search will get you many cheap frequency counters too.