My homemade pedal

[_stick]

 Im trying to turn a voice changer toy into a guitar pedal, but i dont really have any experience in making pedals. I have a basic understanding of electronics and thought it would be easy enough to do. SO i found some schematics i thought would work, bought a true bypass switch and sat down to work on it...But its kinda not working right and in pieces.

Here are some pics of the voice changer before and the "progress" ( )  i have made.

http://img.photobucket.com/albums/v57/divingloop/100_1407.jpg
http://img.photobucket.com/albums/v57/divingloop/100_1408.jpg
http://img.photobucket.com/albums/v57/divingloop/100_1410.jpg
http://img.photobucket.com/albums/v57/divingloop/100_1412.jpg
http://img.photobucket.com/albums/v57/divingloop/100_1413.jpg
http://img.photobucket.com/albums/v57/divingloop/100_1414.jpg
http://img.photobucket.com/albums/v57/divingloop/100_1415.jpg

[MartyB]

Cool!  Welcome to the forum!  Your idea is cool and really shows ingenuity.  There are some threads with this idea somewhere.

[psiico]

Hehehe, now I want to try this.

[rockgardenlove]

Cool idea!

How's it sound?

(That is, if it works)

[_stick]

the thing is, that it doesnt exactly work yet...the input and output has a positive and negative..but the schematics dont really show what to do with the negative...ive been using them as grounds for the boards but that isnt exactly working.

[Paul Marossy]

the input and output has a positive and negative..but the schematics dont really show what to do with the negative...ive been using them as grounds for the boards but that isnt exactly working.

Here's some random thoughts:

1. It's designed around the human voice, which occupies a certain frequency range. It may not be capable of processing a guitar signal very well due to the wider range of frequencies possible with a guitar. Kind of like trying to use a telephone as a guitar amp. See what I mean?
2. Maybe that negative on the input and output is supposed to be referenced to a point higher than ground?
3. Does it have a bipolar power supply?
4. I assume it's designed to drive an 8 ohm speaker. Maybe the load on the output is too high for the circuit as designed?