Would like to build a Morley style ABC switch

Started by cmsuter, November 08, 2015, 10:08:24 AM

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cmsuter

I need an ABC switch. but I will need to use 2 outputs at the same time so I dont want A to turn off when I select B. It would be easier for my setup if I just had a button for each output, so it seems the morley is the way to go but I'd like to build it. I've never built a pedal before. the only thing I am confused about is the circuit board itself. What do you guys do for the boards? Isn't each circuit board unique to each style of pedal? So how do I find a board for a ABC selector/combiner?

blackieNYC

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cmsuter


blackieNYC

#3
Gotcha. The Morley is passive though, other than the LEDs. Which will mean isolating resistors at each in and maybe out jack. Can't find a schematic for you. here's the front end:
http://www.experimentalistsanonymous.com/diy/Schematics/Buffers%20Switchers%20Mixers%20and%20Routers/Passive%20Mixer.gif  I think you can just sit down with a pencil and think it thru. Use fixed resistors in place of the pots, but this is a good example of the resistor values required on the inputs. You could go 1meg to ground, 47k or maybe less for the series resistor to each output. Your switching takes place before the 47k Rs and I suppose you need three resistors on each output jack. You could do without a board, but it might be nice if the resistors were all mounted on perf board. You should breadboard this, draw it out yourself and play with it. Bit of head scratching. Just make sure it sounds good with any switch combinations - a very little volume drop is OK, but wrong resistor values will give you filtering, which you can avoid.
Welcome to the forum! This is your first fuzzy, gray, lacking in detail response! Lucky you!  (Someone is probably drawing this out right now) :icon_biggrin:
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Tapflo filter, Gator, Magnus Modulus +,Meathead, 4049er,Great Destroyer,Scrambler+, para EQ, Azabache, two-loop mix/blend, Slow Gear, Phase Royal, Escobedo PWM, Uglyface, Jawari,Corruptor,Tri-Vibe,Battery Warmers

cmsuter