DIY robot voice changer guitar effects pedal

This is my circuit bend of a voice changer electronics kit. It's distinctly lo-fi, glitchy and noisy but it is a fairly straightforward project, doesn't cost much to build and is great fun.

Category:

Music

Tags:

• Guitar effects
• stompbox
• voice changer
• pitch shift
• circuit bend
• ht8950

[MrPHGFX]

For mine I took an additional wire from the gain pot to a mix with Point e. I used a dual pot 100K to mix. The pot values may not be optimal - it just reflects what I had around - experiment with different values.

[MrPHGFX]

This is from memory! looking at the pdf from maplin

I take out R10 and have my guitar in join at s of r10 so basically it feeds into IC2. Take speaker connection x1-2 to pin1 of 100K pot (pin3 of pot to gnd) pin2 of pot where connection 1 of the mic would be if I had put that in. OUt put for the amp comes from point E of where R10 would be.

[scottsober1]

Nice job, a question could you send the schematic diagram or detailed discription of how exactly this is wired.And would the velleman kit that uses the ht8950a chip also work?

[MrPHGFX]

@scottsober1 I don't know the velleman circuit - I havn't examined their circuit in detail but it looks like it has the same parts - ht8950 and an lm386 opamp. It has an additional mic sensitivity control My gut feel is that you could do something similar.

[MrPHGFX]

maplin.co.uk/Media/PDFs/N40FL.­pdf is the diagram

[razieLiumm]

sounds kooool

[vendettav15]

Dude send me the diagrams please

v.shred@yahoo.com

[boxybignic2]

How much are these does it make you sound like A BAD ROBOT

[Hnnix]

Cool! I just bought the IC, I'm defenetly going to try alot of stuff out with it :)

[BeastofYuccaFlats]

Great post!  I've been wanting to try out that kit for some time as a guitar stompbox. What are the values on the 2 pots?