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samuelprincejfm
Copper Member
India
4 Posts |
 Posted - 07/14/2009 : 11:42:59
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| could anyone tell me about the general schematic diagram for an expression pedal,. |
Edited by - Dr. Bob on 07/15/2009 17:05:04 |
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nosi0
Gold Member
Netherlands
511 Posts |
Posted - 07/14/2009 : 13:24:23
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Well without going into too much detail, it has 1 input jack and a pot which varies from zero resistance between tip and ground. to a certain resistance depending on the type of pot is used. I might be wrong but there is not much schematic too it.
I don't believe there are any schematic for expression pedals out there, but if you have a problem with yours or want to make your own then your questions are welcome here. well not in the compact pedals section but i'm sure it will be moved to another section shortly. |
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nosi0
Gold Member
Netherlands
511 Posts |
Posted - 07/14/2009 : 13:51:44
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I found something but i don't think its the type of expression pedal your looking for.
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samuelprincejfm
Copper Member
India
4 Posts |
Posted - 07/15/2009 : 10:26:10
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 thank you for your reply. i'm trying to make one pedal, this may also be useful. i'm new to this field but hope to cope up,,.. |
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nosi0
Gold Member
Netherlands
511 Posts |
Posted - 07/15/2009 : 10:55:19
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What product do you want to use the expression pedal with?
Nosi |
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samuelprincejfm
Copper Member
India
4 Posts |
Posted - 07/15/2009 : 11:30:57
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actually i want to make a common pedal that can control any given expression.
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dthurstan
Copper Member
United Kingdom
18 Posts |
Posted - 07/15/2009 : 12:24:18
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| That diagram supplied by nosi0 is a good starting point. I think the boss expression pedal has another pot, to control the minimum setting. Expression pedals differ from brand to brand. I'd say a 100k pot would be the best to use and a switch to flip how the pot is wired to the jack. M-audio make a universal expression pedal, which has a polarity switch. The other thing to consider when building one is the enclosure. I tried making a volume pedal with an old crybaby but it didn't have a long enough range of travel. |
Edited by - dthurstan on 07/15/2009 12:32:11 |
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Dr. Bob
Moderator
Australia
6593 Posts |
Posted - 07/15/2009 : 15:08:45
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quote:
Originally posted by samuelprincejfm
could anyone tell me about the general schematic diagram for an expression pedal,.
Hi samuelprincejfm
I believe Christo(Mephisto), had a link, or a schematic of one of,
the Roland/BOSS expression/volume pedals.
Perhaps he will chime in & leave a post.
The most difficult part will the mechanics to house your project.
Do you have any old wah's or volume pedals to sue?
Also note that in one of your replies you mentioned
quote:
actually i want to make a common pedal that can control any given expression.
You may have to take into account, that some gear uses an A to D (Analog to Digital) converter & some other support circuitry-buffers
to feed digital data into the expression pedal port.
It's just one more thing to think about.
I guess you really need the data/specs,
on all the products you wish to control, with your home made Exp. Pedal.
Regards Dr. Bob  |
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nosi0
Gold Member
Netherlands
511 Posts |
Posted - 07/15/2009 : 16:31:01
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| The Zoom pedal schematic is not a standard expression pedal is it? I thought standard was just a pot connecting tip to ground with variable resistance? Although if you connect the Zoom pedal to a mono jack for exp pedal i think it would still work. |
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Dr. Bob
Moderator
Australia
6593 Posts |
Posted - 07/15/2009 : 17:05:39
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| Moved to Modifications & Technical - Moderator |
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christianjnorman
Copper Member
India
1 Posts |
Posted - 07/17/2009 : 07:20:03
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| do we have to connect a stereo jack if we wanna control 2 expressions? i mean, with 2 different controllers(pedal)..? |
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Dr. Bob
Moderator
Australia
6593 Posts |
Posted - 07/17/2009 : 08:09:08
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Hi christianjnorman
Welcome to the forum from Australia.
FYI I belive;
There is a link to one of the volume pedals in the Schematic links (sticky) thread, in Mods & Technical.
Regards Dr. Bob |
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Topic |
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schematic for expression pedal
