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Re: OT: LEDs for amp channel switching
> Is this the "FS44" you are using?
Yup.
> Are the switches unique for each selection or are they set up as A/B
switches?
I believe they're unique for each selection, with some kind of logic
circuit
in the head doing the actual routing.
> when you switch from channel one to channel two do you need to
> deselect channel one?
No. I just stomp on the appropriate switch and the channel switches. Two
stomps for a change of channel would be pretty unergonomic. Or maybe the
word is "dumb."
> I think that if you were to arrange the LEDs in series and use a
> diode matrix to determine which LED was lit for which combination you
> could get it working
If you say so. Doesn't sound too hard. Got schematic?
dB
> > > Are these latching or momentary switches?
> >
> >Latching. Big humongoid chrome-plated latching stomp switches. The kind
that
> >give off a moderate "click" when you step on them, and you can feel it
click
> >in your foot bones. The old Fender-style "reverb and vibrato" type
switches.
> >
> >> >Hi Crew-
> >> > This is way OT, but I'll bet one of you loopers just might be
the
> >DIY
> >> >brainiac to solve my problem.
> >> >
> >> >I just purchased a Carvin V3 amp head - great sounding 100-watt EL34
> >> >monster, by the way - but the channel-switching footswitch has no
LEDs on
> >> >it. There are three channels plus a "boost" function, and all four
> >> >footswitches are simple SPDT switches with one lug unused. I figure
it
> >would
> >> >be fairly easy to swap the SPDTs for DPDTs or, if necessary, those
groovy
> >> >Fulltone triple-throw DT switches, drill holes in the switch
>housing,
add
> >> >LEDs and a 9V battery, and I'd be rocking.
> >> >
> >> >The problem is, I can't find a schematic that would cause just one
> >channel
> >> >light to be on at a time. I'm boggled about how to wire it so that
if,
> >for
> >> >example, I'm using Channel 1 and want to change to Channel 2, when I
> >press
> >> >switch #2 (for Channel 2), the LED for switch #1/Channel 1 goes off
and
> >the
> >> >LED for switch #2/Channel 2 goes on. So among the three channels,
only
> >one
> >> >LED can be on at a time. The 4th (boost) switch would remain on or
off
> >> >regardless of which channel is on (that one's easy).
> >> >
> >> > I spent about an hour the other night doing Google searches on
all
> >kinds
> >> >of guitar and amp DIY sites, and I checked my Craig Anderton books,
and I
> >> >couldn't find anything for this other than to get into some kind of
solid
> >> >state switching chip, which I'd rather avoid. It SEEMS like it would
be a
> >> >simple enough circuit WITHOUT any chips or boards, but I don't do
this
> >kind
> >> >of thing often enough to figure it out for myself.
> >> >
> >> >HELLLLLLLPPPPP!
> >> >
> >> >Douglas Baldwin, coyote-at-large
> >> >www.thecoyote.org
> >> >coyotelk@optonline.net
> >> >
> >> >"Life! Life!
> >> >Clouds and clowns!
> >> >You don't have to come down!"
> >> >- Sly and the Family Stone
> >>
> >>
> >> --
> >> ...
> >> http://www.zmix.net
> >>
>
>
> --
> ...
> http://www.zmix.net
>