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DIY Stompboxes => Building your own stompbox => Topic started by: petemoore on April 07, 2004, 11:29:28 AM

Title: OT...Expression Pedal
Post by: petemoore on April 07, 2004, 11:29:28 AM
I have a Yamaha Motif6, and would like an expression pedal for it, don't know whether to buy one or just try making one.
 If it's just a treadle on a pot with a stereo jack or something like that, would probably be easy enough to make one.
 Does anyone know about these things? What's in one?
Title: OT...Expression Pedal
Post by: Marcos - Munky on April 07, 2004, 11:43:19 AM
Take a look in Zoom expression pedal: (http://www.diystompboxes.com/pedals/zoom1.jpg)
Title: Cool
Post by: petemoore on April 07, 2004, 11:59:46 AM
Thanks Munky, I can follow that.
 I'm starting with a 100k.
 If all else fails, I need a volume pedal for the Motif anyway !!!
 Trick part is getting that pot to dial 'itself' when a treadle pedal moves..alot of work, but can be done !
Title: Re: Cool
Post by: KarbonHed on April 07, 2004, 01:41:31 PM
Quote from: petemooreThanks Munky, I can follow that.
 I'm starting with a 100k.
 If all else fails, I need a volume pedal for the Motif anyway !!!
 Trick part is getting that pot to dial 'itself' when a treadle pedal moves..alot of work, but can be done !

Ah... My crappy drawing come back to haunt me :shock: .

That probably won't work with a Yamaha unit. Zoom pedals have the "output" of the pot going to the ring, most other stuff seems to have it going to the tip. Like so...

(http://www.ruinbird.com/electro/controlpedal.jpg)

When I bought a Nobels MF-2 MIDI foot controller a few years ago the control pedal that I had been using with a Zoom unit didn't work properly with it.

A quick email to Nobels tech support got the recommendation of a Yamaha control pedal or a pot value of  47k LIN wired up as shown. Since this is what works perfectly with the Nobels unit I would guess it would work with a Yamaha as well.
Title: Re: Cool
Post by: Eric H on April 07, 2004, 05:49:17 PM
Quote from: KarbonHed

Ah... My crappy drawing come back to haunt me.

Haha...I sent that file to Aron, maybe 4 years ago. I can't remember where I got it, but it helped me and many others, here --thanks '8)'
'8)'

-Eric
Title: Re: Cool
Post by: Marcos - Munky on April 07, 2004, 06:08:30 PM
Quote from: Eric H
Quote from: KarbonHed

Ah... My crappy drawing come back to haunt me.

Haha...I sent that file to Aron, maybe 4 years ago. I can't remember where I got it, but it helped me and many others, here --thanks '8)'
'8)'

-Eric

It helped me too, I built a LDR version for a friend.