electro-music.com   Dedicated to experimental electro-acoustic
and electronic music
 
    Front Page  |  Radio
 |  Media  |  Forum  |  Wiki  |  Links
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 
go to the radio page Live at electro-music.com radio 1 Please visit the chat
  host / artist show at your time
today> Twyndyllyngs Live Chez Mosc
 Forum index » DIY Hardware and Software
I can't believe IT STILL WORKS!!!
Post new topic   Reply to topic Moderators: jksuperstar, Scott Stites, Uncle Krunkus
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
richardc64



Joined: Jun 01, 2006
Posts: 679
Location: NYC
Audio files: 26

PostPosted: Thu Oct 19, 2006 2:48 pm    Post subject: I can't believe IT STILL WORKS!!! Reply with quote  Mark this post and the followings unread

This is what started me off. I didn't forget it, I just didn't know where it was. Re-discovered in a box this morning while looking for something else. A very early sequencer published in Popular Electronics, more than 30 years ago. Used RTL ICs: a hex inverter and 2 dual jk flipflops as a 4-bit ripple counter. Sixteen steps seemed too short to me so I extended it to 64 steps by adding another dual flipflop. I also added a dual NOR gate (that's right, only 2 gates to a package) and wired their outputs thru pots to the 2-transistor "vco", like 4 of the inverters. The remaining 2 inverters formed the clock. Instead of hard-wiring flipflip outputs to the inverters and gate, I brought all the Qs and /Qs out to 4-40 screws and and selected different combinations of bits with alligator clipleads. I'll try to find the schematic.

Radio Schlock didn't have .1" hole perfboard at the time so I had to drill new holes in the more common -- at the time -- perf with holes on .156" centers.

So today I put in 2 'D' cells and, damn! It started beepin' and boopin'! I suggest you keep the volume low if you play the wav sample. (The stuff to drive parents and neighbors nuts.)


primitive2.jpg
 Description:
 Filesize:  94.37 KB
 Viewed:  516 Time(s)
This image has been reduced to fit the page. Click on it to enlarge.

primitive2.jpg



pe_sequence.wav
 Description:

Download (listen)
 Filename:  pe_sequence.wav
 Filesize:  62.08 KB
 Downloaded:  1366 Time(s)

Back to top
View user's profile Send private message Visit poster's website
blue hell
Site Admin


Joined: Apr 03, 2004
Posts: 24422
Location: The Netherlands, Enschede
Audio files: 297
G2 patch files: 320

PostPosted: Thu Oct 19, 2006 2:55 pm    Post subject: Reply with quote  Mark this post and the followings unread

It sounds just like it looks, beautiful, and a bit dusty Very Happy
_________________
Jan
also .. could someone please turn down the thermostat a bit.
Posted Image, might have been reduced in size. Click Image to view fullscreen.
Back to top
View user's profile Send private message Visit poster's website
Scott Stites
Janitor
Janitor


Joined: Dec 23, 2005
Posts: 4127
Location: Mount Hope, KS USA
Audio files: 96

PostPosted: Thu Oct 19, 2006 7:36 pm    Post subject: Reply with quote  Mark this post and the followings unread

Quote:
that's right, only 2 gates to a package


Shocked

Wow - for me, it seems like a miracle anything electronic works, much less thirty years later....
Back to top
View user's profile Send private message
Uncle Krunkus
Moderator


Joined: Jul 11, 2005
Posts: 4761
Location: Sydney, Australia
Audio files: 52
G2 patch files: 1

PostPosted: Thu Oct 19, 2006 8:22 pm    Post subject: Reply with quote  Mark this post and the followings unread

I love it!
Now that's an antique, family heirloom. Cool

_________________
What makes a space ours, is what we put there, and what we do there.
Back to top
View user's profile Send private message Visit poster's website
zipzap



Joined: Nov 22, 2005
Posts: 559
Location: germany
Audio files: 24

PostPosted: Fri Oct 20, 2006 3:45 am    Post subject: Reply with quote  Mark this post and the followings unread

hey uncle, you´ve changed...
_________________
http://www.myspace.com/lorolocoacousticpop
http://www.myspace.com/petrolvendor
music and transcribed jazz basslines
Back to top
View user's profile Send private message
seraph
Editor
Editor


Joined: Jun 21, 2003
Posts: 12398
Location: Firenze, Italy
Audio files: 33
G2 patch files: 2

PostPosted: Fri Oct 20, 2006 5:31 am    Post subject: Reply with quote  Mark this post and the followings unread

zipzap wrote:
hey uncle, you´ve changed...

right, which side is the real you Question

_________________
homepage - blog - forum - youtube

Quote:
Don't die with your music still in you - Wayne Dyer
Back to top
View user's profile Send private message Visit poster's website
Uncle Krunkus
Moderator


Joined: Jul 11, 2005
Posts: 4761
Location: Sydney, Australia
Audio files: 52
G2 patch files: 1

PostPosted: Fri Oct 20, 2006 1:50 pm    Post subject: Reply with quote  Mark this post and the followings unread

Yep,
a change is as good as a holiday!

_________________
What makes a space ours, is what we put there, and what we do there.
Back to top
View user's profile Send private message Visit poster's website
Display posts from previous:   
Post new topic   Reply to topic Moderators: jksuperstar, Scott Stites, Uncle Krunkus
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
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


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