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Re: OT: LEDs for amp channel switching
Is this the "FS44" you are using?
Are the switches unique for each selection or are they set up as A/B
switches?
when you switch from channel one to channel two do you need to
deselect channel one?
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
> > 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
>>
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...
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