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Re: Small questions that don't fit anywhere
Posted: Tue Mar 29, 2022 9:57 am
by brownreasontolive
tommy wrote: Tue Mar 29, 2022 9:41 am
brownreasontolive wrote: Tue Mar 29, 2022 9:30 am
tommy wrote: Tue Mar 29, 2022 9:15 am
Can anyone point me to a project where I can build a small 9-volt battery powered box that will output 0-5V (control voltage) that I can control with a standard TRS expression pedal? Basically like a standalone version of this:
https://syinsi.com/shop/tiles/expression-pedal-cv/ Or it could be even simpler, like one of the attenuator in/outs of the Moog CP-251. I can't really read schematics, so a wiring diagram would be more useful.
Or if anyone knows of an existing one. If I'm buying one it can have more features if they are useful.
Otherwise I guess I can just buy Behringer's cheap ass CV pedal.
Could you not get the cheapest volume pedal possible and turn the pot into a basic sag control?
Not a bad idea. I would need something to limit the voltage at the top end to 5V though. I suppose I could use another internal pot or resistor to do that though.
Yeah, I think with the wiper all the way open you could just test different resistors on lug 3 until you get your nominal voltage.
I suppose with a transistor, a diode and a couple caps you could also build a small voltage regulator that goes ahead of the pot?
Somebody smarter could tell you with more certainty. It can certainly be done!
Though either way, I'm not sure the DIY route would be cheaper than the Behringer option, unless the Behringer is missing something...
Re: Small questions that don't fit anywhere
Posted: Tue Mar 29, 2022 10:03 am
by tommy
brownreasontolive wrote: Tue Mar 29, 2022 9:57 am
Either way, I'm not sure the DIY route would be cheaper than the Behringer option, unless the Behringer is missing something...
I was just thinking if I built a box I could use the expression pedal I already have and might come in handy with not accidentally plugging voltage where it doesn't belong. But I'm sort of coming to the same conclusion you are since I don't already have a volume pedal anyway, which is useful on it's own.
Re: Small questions that don't fit anywhere
Posted: Tue Mar 29, 2022 10:11 am
by brownreasontolive
tommy wrote: Tue Mar 29, 2022 10:03 am
brownreasontolive wrote: Tue Mar 29, 2022 9:57 am
Either way, I'm not sure the DIY route would be cheaper than the Behringer option, unless the Behringer is missing something...
I was just thinking if I built a box I could use the expression pedal I already have and might come in handy with not accidentally plugging voltage where it doesn't belong. But I'm sort of coming to the same conclusion you are since I don't already have a volume pedal anyway, which is useful on it's own.
Makes sense!
You could probably build a cheap little regulator to step from 9v down to 5v, then wire a TRS jack for your expression pedal in place of the potentiometer.
I think that should be simple enough.
Only caveat I can think of there is you may be married to one EXP pedal, as it seems not all of them work the same.
Re: Small questions that don't fit anywhere
Posted: Tue Mar 29, 2022 11:01 am
by bassdriver
A voltage divider
Or also pretty simple, a regulator
Re: Small questions that don't fit anywhere
Posted: Tue Mar 29, 2022 3:04 pm
by Curry Pervert
tommy wrote: Tue Mar 29, 2022 9:15 am
Otherwise I guess I can just buy Behringer's cheap ass CV pedal.
Before you do, have a read through some reviews on amazon.
Re: Small questions that don't fit anywhere
Posted: Tue Mar 29, 2022 3:08 pm
by BrendanK
I just got an old Sony C38 (which I've wanted forever and am so fucking stoked to use) and the stand adapter is really big (I think Euro is usually 3/8, US is 5/8, Id guess maybe this is 3/4 or bigger?)
Does anyone have an idea of what I need to be able to screw this onto a stand?
EDIT - Never mind, I think it uses one of the old RCA ribbon mic adapters, and got it sorted.
Re: Small questions that don't fit anywhere
Posted: Tue Mar 29, 2022 3:18 pm
by Garth
BrendanK wrote: Tue Mar 29, 2022 3:08 pm
I just got an old Sony C38 (which I've wanted forever and am so fucking stoked to use) and the stand adapter is really big (I think Euro is usually 3/8, US is 5/8, Id guess maybe this is 3/4 or bigger?)
Does anyone have an idea of what I need to be able to screw this onto a stand?
Apparently they're same as old RCA mics:
https://www.aearibbonmics.com/products/ad1-adapter/ or
http://xaudia.com/shop_item/rca-brass-s ... a-adapter/ in the UK
Re: Small questions that don't fit anywhere
Posted: Tue Mar 29, 2022 4:23 pm
by tommy
Curry Pervert wrote: Tue Mar 29, 2022 3:04 pm
tommy wrote: Tue Mar 29, 2022 9:15 am
Otherwise I guess I can just buy Behringer's cheap ass CV pedal.
Before you do, have a read through some reviews on amazon.
Hahahaha. Well, it's either that or an old DOD FX17 (which is clunky as hell, bandmate had one 20 years ago) because I'm NOT spending $150 on a CV pedal!
Re: Small questions that don't fit anywhere
Posted: Wed Mar 30, 2022 12:19 pm
by brownreasontolive
tommy wrote: Tue Mar 29, 2022 4:23 pm
Curry Pervert wrote: Tue Mar 29, 2022 3:04 pm
tommy wrote: Tue Mar 29, 2022 9:15 am
Otherwise I guess I can just buy Behringer's cheap ass CV pedal.
Before you do, have a read through some reviews on amazon.
Hahahaha. Well, it's either that or an old DOD FX17 (which is clunky as hell, bandmate had one 20 years ago) because I'm NOT spending $150 on a CV pedal!
Those DOD treadles are sweet!
Re: Small questions that don't fit anywhere
Posted: Wed Mar 30, 2022 1:03 pm
by Curry Pervert
tommy wrote: Tue Mar 29, 2022 4:23 pm
Curry Pervert wrote: Tue Mar 29, 2022 3:04 pm
tommy wrote: Tue Mar 29, 2022 9:15 am
Otherwise I guess I can just buy Behringer's cheap ass CV pedal.
Before you do, have a read through some reviews on amazon.
Hahahaha. Well, it's either that or an old DOD FX17 (which is clunky as hell, bandmate had one 20 years ago) because I'm NOT spending $150 on a CV pedal!
Fair enough, just as long as you're going into it with your eyes open.
