[sdiy] Issue with CD4024 Ripple Counter

David G Dixon dixon at mail.ubc.ca
Wed Sep 22 20:59:43 CEST 2021

Hello SDIY Team,
I know, I promised that my last posting would be my last on this topic, but
I have just one more tiny detail to share with you.
I just tested CD4024BE and CD4024BCN on the breadboard, this time clocked by
a CD40106 hex Schmitt trigger.  The 40106 was powered with 15V (VDD) and 0V
(VSS), and I used a 100k resistor and 100nF cap to create a square wave
oscillator with a frequency of about 120 Hz.  The output of this oscillator
is a perfect pulse wave that oscillates between 15V and 0V.
Results: No change.  CD4024BCN clocked normally.  CD4024BE clocked
If I have time today, I'm going to swing by Lee's Electronic Components on
my way home and buy a few new CD4024BE chips to test.
If I get some new chips, and the results are any different, I'll let y'all
know.  Otherwise, this is my last word on the topic.
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