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Lysol
Joined: Mar 06, 2012 Posts: 12 Location: PA
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Posted: Sat Aug 01, 2020 12:02 pm Post subject:
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I gave this schem a go on the breadboard as well, which I believe is basically the same principle for cascading them as seen in the 4017 manual.
However though, i'm still left with a similar problem. It will cycle through all 16 steps just fine, but I can't seem to find a configuration using the reset pins to have control over how many steps it cycles through.
Ultimately, I'm trying to get a 16 step sequencer that has the same toggles as seen in the "Little Gate."
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Lysol
Joined: Mar 06, 2012 Posts: 12 Location: PA
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Posted: Sat Aug 01, 2020 12:21 pm Post subject:
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PHOBoS wrote: | Quote: | Or, to get the functionality that I want would it be more wise to just attempt cascading them as outlined in fig. 19 in the manual? (via an AND gate?). |
Although the version in the datasheet is different it works somewhat similar and I don't think it would be muich of an improvement. |
Yes, this appears to be the situation I found myself in. Same issue using a transistor AND gate to cascade - reset doesn't work.
PHOBoS wrote: | a much better solution for more steps would be to use a binary counter (4040, 4029, 4520) and a binary to decimal decoder (4514) or a mux (4067) instead of 2 4017s. |
I did check and it does appear as though I have a 4040 and a 4051 |
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PHOBoS

Joined: Jan 14, 2010 Posts: 5810 Location: Moon Base
Audio files: 709
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Posted: Sat Aug 01, 2020 12:36 pm Post subject:
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a single 4051 will only get you 8 steps, but there are ways of cascading them.
For 2 muxes it is not very complicated and to do this you use 3 outputs of the binary counter
for the A,B,C inputs of both muxes and use another output of the counter to control the INH pin
which has to be inverted for 1 of the muxes. _________________ "My perf, it's full of holes!"
http://phobos.000space.com/
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dadinfinitum
Joined: Dec 16, 2019 Posts: 41 Location: Maryland, US
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Posted: Wed Jul 05, 2023 11:17 am Post subject:
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I have a couple elementary questions, and at least is in reference to the cascading 4017s at the beginning:
- CV out is simply taking each output of the 4017, running it through a pot and diode, and connecting all of those, right?
- can you create a gate output by taking the CV output and ANDing it with the clock? Anything extra that needs to happen there?
- with the cascading 4017s, how do the CV outputs work? I understand that you can have two different outputs for each of the 8 steps, but how does the output work for the 16 step?
Thanks in advance! |
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