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Looper's Delight
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> 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 >