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<DIV dir=ltr align=left><SPAN class=481240304-18092021>Well, I wasn't writing
off all CD4XXX chips. Just the ones with edge-sensitive clocks. The
ones that just respond to logic levels never go wrong.</SPAN></DIV>
<DIV dir=ltr align=left><SPAN class=481240304-18092021></SPAN> </DIV>
<DIV dir=ltr align=left><SPAN class=481240304-18092021>The thing is, I'm
developing a product for sale -- another one of my Sketchy Labs modules -- so
it's important that I can rely on the chips I ultimately choose. At this
point, I would never sell a module with a CD4024 in it.</SPAN></DIV>
<DIV dir=ltr align=left><SPAN class=481240304-18092021></SPAN> </DIV>
<DIV dir=ltr align=left><SPAN class=481240304-18092021>Also, just to be clear, I
had four CD4024s, but they were from two very different batches. They had
different looks. Two had a gold stripe on one end, and the others just had
plain white lettering. All seemed bad.</SPAN></DIV><BR>
<DIV dir=ltr lang=en-us class=OutlookMessageHeader align=left>
<HR tabIndex=-1>
<FONT size=2 face=Tahoma><B>From:</B> Pete Hartman
[mailto:pete.hartman@gmail.com] <BR><B>Sent:</B> Friday, September 17, 2021 3:28
PM<BR><B>To:</B> David G Dixon<BR><B>Subject:</B> Re: [sdiy] Issue with CD4024
Ripple Counter<BR></FONT><BR></DIV>
<DIV></DIV>
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Non-UBC Email]</FONT></TD></TR></TBODY></TABLE>
<DIV dir=ltr>he wasn't saying you were a noob. :)<BR><BR>He's saying writing off
the entire CD4XXX series of chips (with prejudice) because it sounds like you
got a bad batch is going to be alarming to those around here who are
noobs.<BR><BR>I do think fishing a couple out to send to someone to grind down
and check would be an interesting exercise.<BR><BR><BR></DIV><BR>
<DIV class=gmail_quote>
<DIV dir=ltr class=gmail_attr>On Fri, Sep 17, 2021 at 3:28 PM David G Dixon via
Synth-diy <<A
href="mailto:synth-diy@synth-diy.org">synth-diy@synth-diy.org</A>>
wrote:<BR></DIV>
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<DIV>
<DIV dir=ltr align=left><SPAN>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></SPAN> </DIV>
<DIV dir=ltr align=left><SPAN></SPAN> </DIV>
<DIV dir=ltr align=left>
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</DIV>
<DIV dir=ltr align=left><FONT size=2 face=Tahoma><B>From:</B> bbob [mailto:<A
href="mailto:fluxmonk@gmail.com" target=_blank>fluxmonk@gmail.com</A>]
<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>
<DIV></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"
target=_blank>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
mailing list<BR><A href="mailto:Synth-diy@synth-diy.org"
target=_blank>Synth-diy@synth-diy.org</A><BR><A
href="http://synth-diy.org/mailman/listinfo/synth-diy" rel=noreferrer
target=_blank>http://synth-diy.org/mailman/listinfo/synth-diy</A><BR>Selling
or trading? Use <A href="mailto:marketplace@synth-diy.org"
target=_blank>marketplace@synth-diy.org</A><BR></BLOCKQUOTE></DIV></DIV>_______________________________________________<BR>Synth-diy
mailing list<BR><A href="mailto:Synth-diy@synth-diy.org"
target=_blank>Synth-diy@synth-diy.org</A><BR><A
href="http://synth-diy.org/mailman/listinfo/synth-diy" rel=noreferrer
target=_blank>http://synth-diy.org/mailman/listinfo/synth-diy</A><BR>Selling
or trading? Use <A href="mailto:marketplace@synth-diy.org"
target=_blank>marketplace@synth-diy.org</A><BR></BLOCKQUOTE></DIV></BODY></HTML>