[sdiy] square wave divider

[Scott Gravenhorst]

Ok, CD4018 is a divide by N counter on a chip.

Unfortunately, the data I have gives only one
example timing diagram, for divide by 10.  In
this case and I would assume for all of the
even divide ratios, a true square wave output
is available.  I don't know if the same is true
for the odd ratios, they may be asymmetrical.
They will divide by N, but won't be a true
square wave, i.e. high time equal to low time.

Also, the odd ratios need an external AND gate,
such as CD4001B, but since it's a quad, you can
do 4 odd counters with one 4001.

<soundgood at web.de> wrote:
>Sorry for the confusen. I want to devide.
>Messed up the email.
> 
>
>
><soundgood at web.de> wrote:
>>I am looking for a circuit or a chip that can devide a square 
>>wave to give me the 2,3,4,5,6,7 and 8 division of the input 
>>frequency as a square wave. 
>
>I'm confused here, do you want to multiply the frequency
>or divide it?  You used both terms in the same sentence.
>Division is a matter of clever use of flipflops.  Multiplication
>can be done with the same division ratios, but with the 
>flipflops inside the loop of a PLL (CD4046 is probably the best).
>
>>There are chips like them in this 
>>Organ I am working on but they are not made any more. So does 
>>anybody know of such a chip or has an good idea of building a 
>>circuit. I could build a circuit around some digital flip flops 
>>and a counter but that would be 17 chips. So any help really 
>>needed. T 
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- Government: The other religion.
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-- Scott Gravenhorst | LegoManiac / Lego Trains / RIS 1.5
-- Linux Rex         | RedWebMail by RedStarWare
-- FatMan: home1.GTE.NET/res0658s/TekLab_FatMan_WebSite/index.html