electro-music.com   Dedicated to experimental electro-acoustic
and electronic music
 
    Front Page  |  Articles  |  Radio
 |  Media  |  Forum  |  Wiki  |  Links  |  Store
Forum with support of Syndicator RSS
 FAQFAQ   CalendarCalendar   SearchSearch   MemberlistMemberlist   UsergroupsUsergroups   LinksLinks
 RegisterRegister   ProfileProfile   Log in to check your private messagesLog in to check your private messages   Log inLog in  Chat RoomChat Room 
 Forum index » DIY Hardware and Software » Lunettas - circuits inspired by Stanley Lunetta
Random Gates Circuit using 4093 & 4013
Post new topic   Reply to topic Moderators: mosc
Page 1 of 1 [7 Posts]
View unread posts
View new posts in the last week
Mark the topic unread :: View previous topic :: View next topic
Author Message
gasboss775



Joined: Jan 02, 2016
Posts: 188
Location: Scotland

PostPosted: Sun Apr 23, 2017 1:20 pm    Post subject: Random Gates Circuit using 4093 & 4013 Reply with quote  Mark this post and the followings unread

2 fast oscillators of different frequencies are combined by in one case an OR gate and in another an XOR gate. Snapshots of this complex waveform are captured by the 4013 D type flip flop at a rate determined by the tempo clock. This could also be from an external clock.

I will add the other 1/2 of the 4013 later, the one shown deals with the output of the XOR gate, the other will deal with the output of the OR gate.


share.jpg
 Description:
 Filesize:  158.19 KB
 Viewed:  145 Time(s)
This image has been reduced to fit the page. Click on it to enlarge.

share.jpg


Back to top
View user's profile Send private message
PHOBoS



Joined: Jan 14, 2010
Posts: 3915
Location: Moon Base
Audio files: 579

PostPosted: Sun Apr 23, 2017 5:00 pm    Post subject: Reply with quote  Mark this post and the followings unread

I am intrigued by your XOR gate, haven't tried to figure it out yet though. Are those actually zenerdiodes
and if so do they have the same voltage ? Sampling high frequency oscillators does indeed work well for
'random' especially when you throw a couple in the mix. A shift register with a high frequency oscilator
connected to the data input also works nice and you can attach a resistor network to it to create a semi-
analog signal.

_________________
"My perf, it's full of holes!"
http://phobos.000space.com/
SoundCloud BandCamp Stickney Synthyards Captain Collider
Back to top
View user's profile Send private message Visit poster's website AIM Address Yahoo Messenger MSN Messenger
Blue Hell
Site Admin


Joined: Apr 03, 2004
Posts: 22483
Location: The Netherlands, Enschede
Audio files: 219
G2 patch files: 319

PostPosted: Mon Apr 24, 2017 1:48 am    Post subject: Reply with quote  Mark this post and the followings unread

The XOR was explained here : http://electro-music.com/forum/topic-68544.html - interesting thing :-)
_________________
Jan
Back to top
View user's profile Send private message Visit poster's website
gasboss775



Joined: Jan 02, 2016
Posts: 188
Location: Scotland

PostPosted: Mon Apr 24, 2017 2:48 am    Post subject: Reply with quote  Mark this post and the followings unread

PHOBoS wrote:
I am intrigued by your XOR gate, haven't tried to figure it out yet though. Are those actually zenerdiodes
and if so do they have the same voltage ? Sampling high frequency oscillators does indeed work well for
'random' especially when you throw a couple in the mix. A shift register with a high frequency oscilator
connected to the data input also works nice and you can attach a resistor network to it to create a semi-
analog signal.


The Diodes are Schottky diodes which have a lower forward voltage than regulars. Probably not strictly necessary here & I expect 1n4148's would work as well.

I tried your idea with the shift register in the past using a 4094 8 bit SR. I found there was a problem with the outputs being unsteady whilst the clock remained in the high state. That is the data was being routed through to the output whilst the clock was high rather than being sampled at the rising edge of the clock pulse. Maybe the problem is just with the 4094, I haven't tried other SR's yet.
Back to top
View user's profile Send private message
PHOBoS



Joined: Jan 14, 2010
Posts: 3915
Location: Moon Base
Audio files: 579

PostPosted: Mon Apr 24, 2017 4:49 am    Post subject: Reply with quote  Mark this post and the followings unread

oh shottky diodes, that makes sense, I mixed up my diode symbols Embarassed Yeah, regular diodes should do fine
but it's always good to keep the voltage drop to a minimum.

I am somewhat surprised it doesn't work with a CD4094 it even has an extra latch, I guess I should do some experiments
with it. It seems to work fine with a 4015, I like connecting one of those flickering teacandle LEDs to the data input. Wink

_________________
"My perf, it's full of holes!"
http://phobos.000space.com/
SoundCloud BandCamp Stickney Synthyards Captain Collider
Back to top
View user's profile Send private message Visit poster's website AIM Address Yahoo Messenger MSN Messenger
gasboss775



Joined: Jan 02, 2016
Posts: 188
Location: Scotland

PostPosted: Mon Apr 24, 2017 12:02 pm    Post subject: Reply with quote  Mark this post and the followings unread

PHOBoS wrote:
oh shottky diodes, that makes sense, I mixed up my diode symbols Embarassed Yeah, regular diodes should do fine
but it's always good to keep the voltage drop to a minimum.

I am somewhat surprised it doesn't work with a CD4094 it even has an extra latch, I guess I should do some experiments
with it. It seems to work fine with a 4015, I like connecting one of those flickering teacandle LEDs to the data input. Wink


I wonder if I had a bad batch of 4094's as I'm sure that I tried more than one. I do have a few 4015's so I'll give this a go.

Where do you get the flickering teacandle LED's, I haven't seen those before?
Back to top
View user's profile Send private message
PHOBoS



Joined: Jan 14, 2010
Posts: 3915
Location: Moon Base
Audio files: 579

PostPosted: Mon Apr 24, 2017 12:24 pm    Post subject: Reply with quote  Mark this post and the followings unread

I get those LEDs out of electronic teacandles, I think the last time I bought some they came in a pack of 4 for €1,-
You can also get the LEDs separately on ebay in a variety of colors.

_________________
"My perf, it's full of holes!"
http://phobos.000space.com/
SoundCloud BandCamp Stickney Synthyards Captain Collider
Back to top
View user's profile Send private message Visit poster's website AIM Address Yahoo Messenger MSN Messenger
Display posts from previous:   
Post new topic   Reply to topic Moderators: mosc
Page 1 of 1 [7 Posts]
View unread posts
View new posts in the last week
Mark the topic unread :: View previous topic :: View next topic
 Forum index » DIY Hardware and Software » Lunettas - circuits inspired by Stanley Lunetta
Jump to:  

You cannot post new topics in this forum
You cannot reply to topics in this forum
You cannot edit your posts in this forum
You cannot delete your posts in this forum
You cannot vote in polls in this forum
You cannot attach files in this forum
You can download files in this forum
e-m mkii

Please support our site. If you click through and buy from
our affiliate partners, we earn a small commission.


Forum with support of Syndicator RSS
Powered by phpBB © 2001, 2005 phpBB Group
Copyright © 2003 through 2009 by electro-music.com - Conditions Of Use