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 Forum index » DIY Hardware and Software » Lunettas - circuits inspired by Stanley Lunetta
elmegil's CMOS challenge thread
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elmegil



Joined: Mar 20, 2012
Posts: 1346
Location: Chicago
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PostPosted: Wed Oct 03, 2012 9:22 pm    Post subject: elmegil's CMOS challenge thread Reply with quote  Mark this post and the followings unread

My bag consists of

4011 x 2 quad 2-input NAND
4013 x 2 dual DFF with set/reset capability
4020 x 1 14-stage binary counter
4023 x 5 triple 3-input NAND
4027 x 2 Dual JK Flip Flop
4028 x 1 BCD to Decimal (1 of 10) decoder
4051 x 1 8 channel analog multiplexer/demultipolexer
4082 x 4 dual 4-input AND
4093 x 3 quad 2input NAND Schmitt Trigger
4518 x 4 dual BCD up counter

I'm an utter noob at this. Closest thing to a Lunetta I've built to date is a Weird Sound Generator. But it seems like it might be fun....
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elmegil



Joined: Mar 20, 2012
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PostPosted: Wed Oct 03, 2012 9:26 pm    Post subject: Reply with quote  Mark this post and the followings unread

So far I have fried one pot (oh yeah, that vactrol needs a limiting resistor, doesn't it?). Thankfully no damage other than that and the vactrol it was hooked to, and these are from the Electronic Goldmine blowout, so not terribly great loss.

What I have so far is 1/4 4093 clocking 4020, 4020 Q4-Q14 outputs driving an R2R ladder, driving a vactrol controlling the pitch of another 1/4 4093 oscillator. I have lots of echo/noise, I need to get some filter caps on these boys. But I think it sounds interesting at least....


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elmegil



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PostPosted: Wed Oct 03, 2012 9:27 pm    Post subject: Reply with quote  Mark this post and the followings unread

I'm interested in what happens if I use that oscillator controlled by the vactrol to clock the 4020, giving a feedback loop of sorts.

I have some other ideas too, though I doubt many of them are very original....
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elmegil



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PostPosted: Sun Oct 07, 2012 11:27 am    Post subject: Reply with quote  Mark this post and the followings unread

And here's the answer to that question, fairly interesting, but needs more stuff. Good thing I have a few more chips and bits of chips Smile


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elmegil



Joined: Mar 20, 2012
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Location: Chicago
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PostPosted: Fri Oct 12, 2012 8:16 pm    Post subject: Reply with quote  Mark this post and the followings unread

Moving along, getting more complicated and with blinky lights (can't record a video because I don't have a good way to sync audio with video short of using speakers, and it's after some people's bedtime....)

I like the sounds, but I'm not at all satisfied with the amount of user interaction possible yet though. I can tweak a couple of sounds/speeds with pots, but not a lot, certainly not performance grade.


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RingMad



Joined: Jan 15, 2011
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Location: Montreal, Canada
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PostPosted: Sat Oct 13, 2012 5:09 am    Post subject: Reply with quote  Mark this post and the followings unread

Interesting sounds in there! Thanks for posting your progress.

James.
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