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 » Circuit Bending
Circuit Bent Coleco Talking Teacher
Post new topic   Reply to topic Moderators: dnny, v-un-v
Page 1 of 1 [3 Posts]
View unread posts
View new posts in the last week
Mark the topic unread :: View previous topic :: View next topic
Author Message
seaweedfactory



Joined: Apr 12, 2006
Posts: 74
Location: Portland, Maine

PostPosted: Sat Jun 02, 2012 9:44 am    Post subject: Circuit Bent Coleco Talking Teacher
Subject description: with schematics
Reply with quote  Mark this post and the followings unread



Here's my take on bending the Coleco Talking Teacher toy. There are a few schematics floating around, but the bends on them don't quite work as advertised.

The two of the glitch loops use 25K potentiometers in such a way that the bend is deactivated when the potentiometer is rotated to maximum resistance. This means a switch is not necessary to activate the bend and that the bend is adjustable. Different sounds are produced by these bends a different resistances. At lower resistances the sound will subtly glitch between what it should be and a slightly off variation. At higher resistances, the sound is fully glitched and unrecognizable. The bend which does use a switch did not react to variable resistance in an interesting way.

To perform the pitch modification the onboard pitch adjustment trimpot must be removed. Because this part of the board is crowded, the easiest way to do so by wiggling the trimpot until it breaks free of the board. After this has been removed, a new 500K potentiometer can be soldered in it's place.

This is one of the most stable talking toys I have bent. The long and short loops are repeatable, so the glitches can be played like you would a drum machine or keyboard. The sound is also very clear.


bent-coleco-talking-teacher-diagram.jpg
 Description:
Bent Coleco Talking Teacher diagram
 Filesize:  203.65 KB
 Viewed:  68 Time(s)
This image has been reduced to fit the page. Click on it to enlarge.

bent-coleco-talking-teacher-diagram.jpg



_________________
Blog: http://seaweedfactory.blogspot.com/
Youtube: http://www.youtube.com/user/SeaweedFactory
Back to top
View user's profile Send private message Visit poster's website
JingleJoe



Joined: Nov 10, 2011
Posts: 876
Location: Lancashire, England
Audio files: 14

PostPosted: Tue Jun 05, 2012 3:19 am    Post subject: Reply with quote  Mark this post and the followings unread

That was pretty cool Smile I assume that 500k pot was the clock speed control? You could maybe even add some kind of weird external clock from some logic gates.
_________________
As a mad scientist I am ruled by the dictum of science: "I could be wrong about this but lets find out"


Green Dungeon Alchemist Laboratories
Back to top
View user's profile Send private message
seaweedfactory



Joined: Apr 12, 2006
Posts: 74
Location: Portland, Maine

PostPosted: Tue Jun 05, 2012 11:13 am    Post subject: Reply with quote  Mark this post and the followings unread

Thanks Joe!

The 500K potentiometer is the clock speed control. It has a fairly limited range at the high end. Shorting the two points results in a maximum for the speed. I think an external clock would be the only way to get past this limit.

_________________
Blog: http://seaweedfactory.blogspot.com/
Youtube: http://www.youtube.com/user/SeaweedFactory
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: dnny, v-un-v
Page 1 of 1 [3 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 » Circuit Bending
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
mps board

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