| T.R | Title | User | Personal
Name | Date | Lines |
|---|
| 2214.1 | It's just a pot. | TALLIS::PALMER | Colonel Mode | Tue Dec 26 1989 11:35 | 5 |
| A continuous control is just a potentiometer in disguise. Not all
companies have the same standards, though, so you might want to read
your manual or call Korg to find out what value you need for the pot.
Chris
|
| 2214.2 | why not go all the way? | MIZZOU::SHERMAN | ECADSR::SHERMAN 235-8176, 223-3326 | Tue Dec 26 1989 12:06 | 17 |
| My guess is that you want a linear taper. Could take a VOM to a foot
controller that you "borrow" from a store to get the value. Should be
easy to mount a pot (rotary or slide) onto a box. Might even sell it
via mail order. No reason why you couldn't have a switch in parallel
with the pot. You would have to do something fancy to get a spring
return to zero or to center. That feature might be difficult to do.
What might be neat might be to go all the way and create a
microcomputer-controlled replacement for a foot controller. Add
touch-sensitive pad so that you can slide or point your finger across it
to vary things. Make the bar square so you can control two parameters
at once (something like a Koala pad). Make it programmable via MIDI to
sample and hold, return to zero, invert, return to center, be controlled
via variable-speed, variable-wave LFO, dynamically alter the
charactersitics of the finger pad, and so forth.
Steve
|
| 2214.3 | be creative; make innovative interfaces | MILKWY::JANZEN | Tom FXO-01/28 228-5421 MSI ECL Test | Tue Dec 26 1989 12:18 | 12 |
| > with the pot. You would have to do something fancy to get a spring
> return to zero or to center. That feature might be difficult to do.
not if you buy a pot with a center detente in the first place.
Mouser Electronics or DigiKey may have them; well I know Mouser does
because I bought one from them to replace one I broke.
You should use them for switches activated by laser-diode beams.
Or make a circuit that puts out a voltage proportional to your
heart rate. Or make a circuit that measures your perspiration.
When you werent playing music, you could use it to tell if you were
lying.
Tom
|
| 2214.4 | add voltage control | TALK::HARRIMAN | Meanwhile, back in the jungle, | Tue Jan 02 1990 12:08 | 14 |
|
re: .-1 "it's just a pot"
not necessarily. Certainly on my Korgs and Ensoniqs, the pot is biased
with a voltage source, not supplied by the board itself.
I was just playing with this back in November, which was why I ended
up buying the FaderMaster - sure, for $1.50 you can build yourself a
single potentiometer with voltage source (well, maybe a bit more than
$1.50 but...) and it'll do whatever the input to the board says (i.e.
volume or filter cutoff, or whatever).
/pjh
|
| 2214.5 | I've had it apart, I know what's there | GUESS::YERAZUNIS | If he was a drummer, we all woulda been goners | Tue Jan 02 1990 12:37 | 7 |
|
Uh, on _my_ ESQ-1, the analog foot-pedal jack supplies voltage to the
analog pedal (which contains naught but a potentiometer).
The pedal definitely does NOT contain a battery or other power source.
-Bill
|
| 2214.6 | whatever | TALK::HARRIMAN | Meanwhile, back in the jungle, | Tue Jan 02 1990 15:14 | 9 |
|
re: .-1
but on _my_ EPS, it wants a CV of 0-12V DC. It does NOT supply the
voltage.
Likewise, my polysix wanted 0-6V 1V/oct on the "CV pedal".
/pjh
|
| 2214.7 | Powered CV pedal? | FGVAXX::LAING | Soft-Core Cuddler*Jim Laing*282-1476 | Tue Jan 02 1990 16:39 | 3 |
| So, the EPS pedal is powered, i.e. by battery or "wall bug"?
-Jim
|
| 2214.8 | I think "both" | TALK::HARRIMAN | Meanwhile, back in the jungle, | Thu Jan 04 1990 14:19 | 16 |
|
dunno, I don't own one, I just read the spec in the EPS manual for it.
The "pedal" I used was a rotary pot and a 9V battery. I wasn't able to
get any volumes higher than 85 on a 0-127 scale, so it follows that
a 12V battery would have gotten me to 127. Conversely, when I tried
a AA battery, it only went from 0-15 on a 0-127 scale.
Although I don't really know this, I'd suspect that the EPS pedal
probably uses an op-amp to limit current so your battery doesn't
waste itself too fast. Probably also so that the wall bug doesn't
waste itself either. But this is all purely conjecture based on
logic.
/pjh
|
| 2214.9 | EPS pedal | KEYBDS::HASTINGS | | Fri Jan 05 1990 12:48 | 9 |
| I own one and there is no power for it. Unless I am badly mistaken, it
is the same pedal that the ESQ-1 uses.
Any standard volume pedal can be modified to work with Ensoniq gear,
you just need to re-arrange a couple of the wires. Transoniq Hacker had
an article on this a while back. If you'd like, and if I can find it
I'll post it here.
Mark
|
| 2214.10 | OHM my, resistance value required :( | AISG::MISKINIS | | Tue Oct 09 1990 20:23 | 6 |
| Anyone know what the POT rating is for a "pedal"?
_John_ Who picked up 3 (that's all there was) pedals at a surplus
store, and want's to use them with is keyboards... They
have a pot in them (2 50Ks and 1 25K) but they're not working...
|
| 2214.11 | It varies (ouch!) | PAULJ::HARRIMAN | Accidental Tabouleh | Wed Oct 10 1990 12:44 | 11 |
|
no pun intended.
Seriously, I think it depends on the pedal - I have one that is
a 100k pot, and another with a 20k pot in it, they both seem to
work nearly identically (the 20k pot has a more "responsive feel").
nb. they're wired identically, i.e. pins 1-2 to one side, pin 3 to
the other.
/pjh
|
| 2214.12 | | TROA01::HITCHMOUGH | | Wed Oct 10 1990 12:45 | 10 |
| Not all pedals use pots as they tend to develop noise. Instead they use
an optical system and vary the light on a light dependent resistor.
You may have a unit that needs one of these as opposed to a pot.
50k is a good value I think and should make *something* happen if a
pot is o.k.
Ken
|