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Deigh

Apr 26, 2011
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How about a foot pedal operating a solenoid?

Looking into this at the moment, where could I get a suitable 12v solenoid, the only ones I have or can see in catalogues are just for switching?


Or even easier, a foot pedal pneumatically operating a "finger".
The latter would be safer as the amount of force and the distance of travel would be more easily "modulated" by your foot action. (and it may be quieter too)

Pneumatics! Nah, dont think so, this would require some sort of air pressure supply wouldn't it? :eek:
 

(*steve*)

¡sǝpodᴉʇuɐ ǝɥʇ ɹɐǝɥd
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Yep, you have a foot pedal that when you stomp on it, it squeezes a bulb. Air is forced out along a plastic line and the pressure pushes something onto the key.

1 way valves in the bulb typically allow it to refill quickly and a spring returns the "finger" to the rest position.
 

Deigh

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Yep, you have a foot pedal that when you stomp on it, it squeezes a bulb. Air is forced out along a plastic line and the pressure pushes something onto the key.

1 way valves in the bulb typically allow it to refill quickly and a spring returns the "finger" to the rest position.

Thanks, but think I'll stick to the relay trick, still looking for a suitable heavy duty relay but think I should look into an old heater. There may be something suitable there.;)
 

Deigh

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He says his Macs are rather old. I don't know if they're running OS X or not, or whether they have USB. He will have to let us know. Good find.

No, computer is pre-USB, contacts are 9pin mini (I think that is what they are called!)

Got other things more important being worked on at the moment but have partially built a foot operated roller volume control with room on the device for a contact button. Have taken an old printer apart and retrieved a nice little motor with a geared down wheel which does a revolution in about a second. Plan to build this into a frame which will sit over the computer's space bar, then when the motor is triggered to do one revolution a cam will touch the spacebar and return to a neutral postion. This will trigger the program to start.

Hope to get around to finishing the job before Xmas but at the moment am cutting some rust out of the Mazda camperbus to make it respectable before the holidays. :D
Regards
Deigh
 

Moderhater

Nov 20, 2011
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I have a question, are you playing live for friends (say around a campfire) where you
want the backing to play with you. Or all you playing you're part and the backing while recording?
The reason Ii ask is because while recording over the last few years using multiple
DAWs I always found it easier to fix this problem on the software side by
making my backing music, then playing that in headphones while recording riffs
and then combining them in the daw.If its the other way around, then what we did was by a wireless
num key pad and assigning all the pattern switches and fx to those
keys.

Hope that might help.
 
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Deigh

Apr 26, 2011
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I have a question, are you playing live for friends (say around a campfire) where you
want the backing to play with you. Or all you playing you're part and the backing while recording?

Thanks for reply..No, I do a certain amount of busking and also play for campervan rallies (my wife and I are campervan addicts!) So I have the rhythms for the numbers I wish to play on computer and I add the lead live! Most tunes I also have a solo unbacked arrangement and I like to play this first and then bring the recorded rhythm in for the last couple of choruses. So you see why I want to trigger the computer without taking hand or eye off the guitar!

Regards
Deigh :cool:
 
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davelectronic

Dec 13, 2010
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I was just thinking that, conversion from usb to another interface, ive done usb to ps2 briefly, no pc control until i switch usb support on in bios, it might reduce the data speed a little, but there might be an alternative interface out there like one of the adapters in kelvinmead link. :)
 

Deigh

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I was just thinking that, conversion from usb to another interface, ive done usb to ps2 briefly, no pc control until i switch usb support on in bios, it might reduce the data speed a little, but there might be an alternative interface out there like one of the adapters in kelvinmead link. :)

Yes, but that isn't the total problem, there is only one input on my computer so I'd have to disconnect the keyboard or mouse and that is just too much trouble!
 

davelectronic

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Hi again Deigh.
I am not totally sure what type of pc only supports one form of control for key board mouse, and other attachments if you want them, could you not incorporate a hub, what ever your connection is to usb, then on to a multiple point usb hub, surely it would support your data transfer. :)
 

Deigh

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Hi again Deigh.
I am not totally sure what type of pc only supports one form of control for key board mouse, and other attachments if you want them, could you not incorporate a hub, what ever your connection is to usb, then on to a multiple point usb hub, surely it would support your data transfer. :)

My computer is an old B/W Macintosh, It has only one PS/2 input. Just had a look through a book of computer supplies and I see to my surprise there is such a thing as a USB to PS/2 adapter! Will purchase one on my next trip to the big smoke to see what it will do for me!
Thanks.:eek:
 

davelectronic

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PS 2 to usb interface

As i said earlier ive used a PS2 pc connection to usb convertion, it was only for a short time for key board and mouse use, as usb support had not been set up in the pc's bios settings, so i needed it for access to the systems bios. I think it should work in theory, there may be a little compromise in the data transfer rate, but negligible i think, if 1 x usb works ok, then i would use a powered hub to extend the possible connections, the only down side is all that data trafic down one transfer port.
 
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Deigh

Apr 26, 2011
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As i said earlier ive used a PS2 pc connection to usb convertion, it was only for a short time for key board and mouse use,

Just to let everyone know that the problem is still being tackled. I have decided on a mechanical approach and am building a 'finger' which is operated by a nylon thread (taken from a coil of replacement stuff for my garden weedwhacker!) running through 2metres of 3mm transparent tube. The other end driven by foot pressure is yet to be designed but I have an idea on what to do with it.

There is no hurry to do this, I work on it when bad weather prevents my working on my camperbus.:D
 
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cliff

Feb 27, 2012
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If you want to keep a regular keyboard attached as well as your foot operated on you could get one of these http://www.versalent.biz/smarty.htm
Nice thing about usb is you can plug in multiple keyboards and mice.

Also I can not find it now but I saw where a guy had taken a keyboard and took off the keys he did not need then 'glued' on large round (sorry do not remember what) buttons on top of the keys that were left, he may have glued on extensions to get them a little above the keyboard or maybe they came with it. I am thinking there are round cabinet knobs that would work. These he just tapped with his feet. Quick, cheap easy.
 
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Deigh

Apr 26, 2011
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Nice thing about usb is you can plug in multiple keyboards and mice.

Great, but my computer is about fifteen years old and is not USB!

Also I can not find it now but I saw where a guy had taken a keyboard and took off the keys he did not need then 'glued' on large round (sorry do not remember what) buttons on top of the keys that were left, he may have glued on extensions to get them a little above the keyboard or maybe they came with it. I am thinking there are round cabinet knobs that would work. These he just tapped with his feet. Quick, cheap easy.[/QUOTE]

Not a bad idea but I need the keyboard at working height because it is used to open the program and select the numbers required. Cannot possibly consider trying to get my foot up to that height, I even have to go down on the floor to cut my toenails!!!
 

cliff

Feb 27, 2012
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spacebar of the computer and this is a problem because it means I have to take away a hand (and my eyes) from the guitar for

a few seconds and this causes a break in the flow of music.

Question is...how can I do this with my foot? I have a foot operated volume control to which I can add buttons.

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y computer is an old B/W Macintosh, It has only one PS/2 input.


`
I understood you wanted to use your foot, also that you have PS/2 connections. This would allow 2 keyboards to be hooked up, one on the floor as a footswitch. I think with the smart switch it only takes commands from one key at a time so you can't press spacebar on the main keyboard while pressing it with your foot switch keyboard at the same time. I could be wrong do not own one just read up on them.

What I meant by the USB comment is it is real easy with USB now, not so back when PS/2 was common.

Maybe I misunderstand something.
 
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