Looking for a counter IC that will go to 16 or more

[ugly_guitar_guy]

So Ive been studying The Tone God's Vanishing point schematic to begin building this week, and I know his v2 will count up to 10 (4017 ic), but I've been curious about finding a clock ic that will count to 16. Anyone know of one that will go to or above that? Thanx!

[nelson]

I think it is possible to put more than one 4017 in series. You can do it by using the last decoded output to switch the clock signal between two 4017's.

I have never tried it, but I don't see a reason why it wouldn't work.

[ugly_guitar_guy]

That was a thought that I had originally but unfortunately I don't know enough about components to actually design that. I can just basically build what I see, haha. I'm sure I could figure it out with a little time though.

Basically I'm just wanting to have a maximum 16 stage filter sequencer pedal. I'm a pretty big Muse fan and would love to have this effect in my arsenal.

Can anyone add how nelson's suggestion might be possible?

[frequencycentral]

The other way is to have an 8 step seq (4022) with two rows of knobs and use the first step to switch a flip flop (half a 4013) which basically multiplexes between the two rows.........does that make sense? If you're still unsure PM me and I will get a schematic together.

[alfiollett]

http://ourworld.compuserve.com/homepages/Bill_Bowden/page5.htm

Lots of good circuits

Hope it helps

[frequencycentral]

This should work:



I'll post a simplified version in a while, this one was designed to switch audio signals too, so you could lose the opamp buffers.

[frequencycentral]

A simpler version:



And a simple as it get analogue sequencer:



The 4022 is pretty much the same as the 4017, just 8 step instead of 10. they even share a datasheet - recommended reading!

[frequencycentral]

Oh yeah, and I'm pretty sure you could substitute the 4066 gates with FETs.

[ugly_guitar_guy]

well, it looks like the link that alfiollett provided has a pretty simple diagram of how to make the 16 stage happen. I'll have to sit and see if I can incorporate that into The Tone God's design. Looks like it's gonna be a busy week for me.. 

[ollie]

Looking at a datasheet for the 4017 it looks like it does have a carry out which you can use to count higher. If you connect the /10 pin to the clock of a second IC it should do it

From the chip layout I have in front of me you would connect pin 12 of your first IC to pin 14 of your second then ground the Q6, 7, 8, and 9 of the second chip for counting up to 16

[Fleetdog]

Looking at a datasheet for the 4017 it looks like it does have a carry out which you can use to count higher. If you connect the /10 pin to the clock of a second IC it should do it

From the chip layout I have in front of me you would connect pin 12 of your first IC to pin 14 of your second then ground the Q6, 7, 8, and 9 of the second chip for counting up to 16

It looks to me as though using pin 12 of the first chip (divide by 10) to pin 14 of the second chip (clock) would give you 100 steps.  To get only 16 steps you will need to use a bit more logic.   You could use just a flip flop for your tens place with it taking it's clock from pin 12 of the first chip and it's input from it's own inverted output so that you have 20 steps. To drop that to 16, you'd use and and gate so that if the ten's place is high and so is the 6 reset gets pulled high on the 4017.  Beyond that, you'd still need logic to combine the one's and ten's place for your switching. 

If I were doing this, I think I would find a different chip that either goes up above 16 or counters that output binary (rather than one output per count) and use a separate multiplexer chip.   

[ollie]

It looks to me as though using pin 12 of the first chip (divide by 10) to pin 14 of the second chip (clock) would give you 100 steps.  To get only 16 steps you will need to use a bit more logic.   You could use just a flip flop for your tens place with it taking it's clock from pin 12 of the first chip and it's input from it's own inverted output so that you have 20 steps. To drop that to 16, you'd use and and gate so that if the ten's place is high and so is the 6 reset gets pulled high on the 4017.  Beyond that, you'd still need logic to combine the one's and ten's place for your switching. 

If I were doing this, I think I would find a different chip that either goes up above 16 or counters that output binary (rather than one output per count) and use a separate multiplexer chip.   

Ah, woops, sorry about that, my mistake

I was going to suggest using 2 4029s but it might not be as easy to seperate out the binary