Seq-y pattern generator project

[loss1234]

can someone explain how this thing works?if i give it a clock, does it send out random triggers? gates? it looks cool but i dont want to build it and then find out it needs some sort of input i dont have. what are the bits?

thanks

[bugbrand]

You could think of it as being four preset values, with only one of them being 'active' at any time.

You select which value is selected by using two Select inputs - feed gate (not trigger) signals into these inputs.

So, you've got four preset pots A, B, C, D
And two Select Inputs 1 , 2

This gives:::
Select1 = Lo / Select2 = Lo ===> Preset A
Select1 = HI / Select2 = Lo ===> Preset B
Select1 = Lo / Select2 = HI ===> Preset C
Select1 = HI / Select2 = HI ===> Preset D

[loss1234]

hmmm. but what do these four possible values output?

i suppose what i am asking is , does this work like a sample and hold sort of module or sequencer? does it output cv or audio? if i can use it to make weird sounds (through cv routing into a vco) then i want to make one!

[bugbrand]

CV outputs (0 to 5v).

(though you could clock it at audio rates for audio output! -- when I say Clock, I mean feeding inputs to the 2 Select Inputs)

No, not sample & hold.
Yes, kind of like a sequencer in some ways, but a strange one..

[Rykhaard]

[crashlander42]

Found a video of the Bugbrand pattern generators on a breadboard from a while back when I was cleaning crap off of my phone. Thought I'd throw it in the thread. There can never be enough video links on a thread, right?

http://www.youtube.com/watch?v=bJGTrxqsTK0

I think I violate several rules of using solderless breadboards here.

[endif]

This project is made of awesome, as so many of yours are.

Sadly, I just can't envision myself enjoying etching and drilling my own boards.. How I wish you offered PCBs! =]

[andrewF]

[crashlander42]

It's a really simple project to do on veroboard. I've done several of modules this way when I've been too lazy to etch my own boards or didn't have access to a laser printer.

[loss1234]

so will the lf398 version work as well as the ad version? i have a few lf398's id like to use and was just wondering what the differences are between the 2 versions.


thanks

[fluxmonkey]

[endif]

Hmm. Yes, I have one of those, but don't feel up to the 'slightly deeper end' of the pool yet..

Besides, I have SO many PCB projects to finish already.
Once I build more of these finished boards into panels.
Soon.

But thanks to all for the supportive words.
=]

[crashlander42]

Another pattern generators video.

http://www.youtube.com/watch?v=fzXGC2oY6BU

[goldenechos]

Which CD4052 is everybody using in this design?

I am having some strange behavior using a CD4052BCN.

The CD4052BCN was getting very hot, and the 5V supply was fluctuating too much.

I changed how the the 5V is supplied to the pots and the instability is gone and the 4052 is no longer getting hot. I guess I stilll want to know why nobody else experienced this behavior.

Additionally there is considerable bleed through of the Bit 0 and Bit 1 signals to both channels of the CD4052BCN. This causes the LEDs to blink with every clock pulse and the CV to have spikes. The sound is sort of cool, but again, I want to know why I am the only person to have experienced this!??

I am also running off +/_15V, and I remember Tom Bugs using +/-12V. Perhaps this is the culprit.


Any insight will be appreciated.
Tony

[andrewF]

Are you powering the 4052 between +15V and ground (ie - not -15V)?

That is the first thought i had when you said it is hot. The 4052 can only handle an 18.5V voltage range.

If you have some spare ones, try them and see if it is the same?

[goldenechos]