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<DIV dir=ltr align=left><SPAN class=438570320-17092021>I'm tempted to dig those
shitty chips out of the trash and mail them to you, to see if
you fare any better, given that I'm such a noob (with 13 years of
experience designing millions of dollars worth of successful synth
modules).</SPAN></DIV>
<DIV dir=ltr align=left><SPAN class=438570320-17092021></SPAN> </DIV>
<DIV dir=ltr align=left><SPAN class=438570320-17092021> </SPAN></DIV>
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<DIV dir=ltr align=left><FONT size=2 face=Tahoma><B>From:</B> bbob
[mailto:fluxmonk@gmail.com] <BR><B>Sent:</B> Friday, September 17, 2021 12:10
PM<BR><B>To:</B> David G Dixon<BR><B>Cc:</B> synth-diy mailing
list<BR><B>Subject:</B> Re: [sdiy] Issue with CD4024 Ripple
Counter<BR></FONT><BR></DIV>
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<DIV dir=ltr>lots of designers have used CD4000 series CMOS in
SDIY circuits successfully. they have their place if used properly,
and their limitations (like every technology). would be a shame if a
newcomer were to be scared off of perfectly good parts just because you couldn't
get it to work in your application.
<DIV><BR></DIV>
<DIV>bbob drake</DIV></DIV><BR>
<DIV class=gmail_quote>
<DIV dir=ltr class=gmail_attr>On Fri, Sep 17, 2021 at 2:52 PM David G Dixon via
Synth-diy <<A
href="mailto:synth-diy@synth-diy.org">synth-diy@synth-diy.org</A>>
wrote:<BR></DIV>
<BLOCKQUOTE
style="BORDER-LEFT: rgb(204,204,204) 1px solid; MARGIN: 0px 0px 0px 0.8ex; PADDING-LEFT: 1ex"
class=gmail_quote>So, I went to the lab and set up a little breadboard.
I put 4024 on it,<BR>used my +15V and 0V rails to power it (yes, I decoupled
with 104), and I<BR>also set up a TL072 as a comparator driven by a
triangle-wave LFO. I sent<BR>the output of the comparator through a
diode to have it go just between 0V<BR>and +15V. I tried clocking two
CD4024BEs, two CD4024BCNs, and one<BR>MC14024BCP. The CD4024BCNs didn't
even work. The CD4024BEs gave me some<BR>really hashy looking
outputs. The MC14024BCP worked perfectly. Then I<BR>tested them in
an ASR, with similar results.<BR><BR>So, I threw all of the CD4024s into the
trash. Unfortunately, I only have<BR>one MC14024B. I'm going to
buy more, cuz they work well, without any<BR>issues.<BR><BR>Lesson learned, I
guess. I'm just not sure what the lesson is, other than<BR>"don't use
CD4XXX chips" or at least ones with edge-driven inputs.<BR>Argghh!!! Why
can't this stuff just work? It's a miracle that we aren't<BR>still
living in caves, wearing skins and hunting sabre-tooth tigers
with<BR>sticks.<BR><BR>_______________________________________________<BR>Synth-diy
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