On 12/25/05, <b class="gmail_sendername">harrybissell</b> <<a href="mailto:harrybissell@prodigy.net">harrybissell@prodigy.net</a>> wrote:<div><span class="gmail_quote"></span><blockquote class="gmail_quote" style="border-left: 1px solid rgb(204, 204, 204); margin: 0pt 0pt 0pt 0.8ex; padding-left: 1ex;">
I don't know how high your clock needs to go, or what frequency range.<br>4046 might go to the mid MHz range.</blockquote><div><br>Well - I'm going to be setting up 2 x CD4024s as 7 bit dividers for clock dividing, as well as providing bits for boolean logic functions.
<br>(Making sure of my math) My maximum frequency that I would need from an oscillator, to have my 13th bit running at 120bpm would be just over 1mhz.<br>(That seems to be an unreasonably / mostly unusable at the last bit. 128khz would still give me 120bpm at the 4th or 5th last bit.)
<br>Sooo ...... I'm looking at no more than 256khz roughly as a maximum speed needed. :)<br></div><br><blockquote class="gmail_quote" style="border-left: 1px solid rgb(204, 204, 204); margin: 0pt 0pt 0pt 0.8ex; padding-left: 1ex;">
>From there you could use a 4024 (or 4040, or many others) to generate<br>binary clocks.</blockquote><div><br>Aye. :) <br></div><br><blockquote class="gmail_quote" style="border-left: 1px solid rgb(204, 204, 204); margin: 0pt 0pt 0pt 0.8ex; padding-left: 1ex;">
The 4046 has a couple of advantages, it uses a VCO that alternates the polarity of the timing cap... dielectric absorption would be 'averaged<br>out' allowing a smaller and cheaper cap. You can set (easily) a minimum and maximum range. You get (for free) an x-or gate that could be a ring modulator ?
</blockquote><div><br>Mmm. For the digital ring mod. That could be a handy effect to have. :)<br>Setting the min. and max. ranges ...... that could be handy as well. :)<br></div><br><blockquote class="gmail_quote" style="border-left: 1px solid rgb(204, 204, 204); margin: 0pt 0pt 0pt 0.8ex; padding-left: 1ex;">
Disadvantage... its not good enough for a pitch VCO. Even with an expo converter...you can't get the accuracy.</blockquote><div><br>I've been trying to figure, how accurate it could be, for doubling the clock speed. Could it be a small enough % for accuracy there?
<br></div><br><blockquote class="gmail_quote" style="border-left: 1px solid rgb(204, 204, 204); margin: 0pt 0pt 0pt 0.8ex; padding-left: 1ex;">H^) harry</blockquote></div><br>I'm going to grab a couple this week, and see what I can find, as well as seeing about prototyping my idea. Hopefully - later today. :)
<br><br>Here's to hoping you had a wonderful Xmas day. :) :) Thank you for your tips, sir. :D<br><br>-- <br>Take care,<br>Warmth and Peace,<br>Ryk<br><br><a href="http://deathlehem.bravehost.com/damian.html">http://deathlehem.bravehost.com/damian.html
</a> - D.A.M.I.A.N.;s webpage - Dec 2105 update