Pedal board

Discussion in 'The Projects Forum' started by sikter, Jan 25, 2012.

  1. sikter

    Thread Starter New Member

    Jan 25, 2012
    23
    0
    Hello,
    I have two FX pedals (9V DC) in loop of my guitar amp which I control using switches on my floor pedal board.
    I control amp's reverb and its channels too.
    I used 3 m long ethernet patch cable and couple of female JR45 adopters.
    (There are 8 leads in cable, I'm currently using 7 of them)

    PROBLEM No 1.
    It looks like I pushed my system to its limits because it wouldn't work with 5 m cable when I play on bigger stages.
    (I know there are different type of ethernet patch cables standard/crossed etc,
    but I double checked my cable to be sure wiring was correct)

    I intend to put couple of mosfets in my circuit. I understand the principle but I don't know how to select the right components.
    I'll place them in same box with my pedals so signal would have very short way to go.

    Now, I am afraid that mosfet wouldn't function because of cable length.

    I need a mosfet (hopefully 9V DC) which would function with this cable
    (5 m long patch, I don't know excaly its square area but it should be easy to find out)
    Can I compensate the cable length with higher voltage?

    PROBLEM No 2.
    I would like to implement light diodes on my floor pedal board but I don't know how to do that
    since some of my pedals are controlled by momentary switches.
    I tried to find "hybrid" double switches ( Latch + momentary) but I couldn't find them.
    This has been done before but I just can't find it.

    Problem No 3
    How can I order 9V mosfet? All shops offer3V, 4.5V, 5V, 12V, 24V...
    Data sheet says there are 9V mosfets.
     
  2. mik3

    Senior Member

    Feb 4, 2008
    4,846
    63
    What is the pedal driving and it stops working with 5m cable?
     
  3. sikter

    Thread Starter New Member

    Jan 25, 2012
    23
    0
    Hello Mik!
    There are two pedals in loop, delay and LS2 (A-B line selector)
    The fault with 5 m cable is next:
    When I activate DELAY pedal it happens that LS2 swaps A-B.
    It doesn't happen each time, I don't see any pattern in it.

    Everything else is working. I can switch A-B on LS2 pedal whole night without affecting the DELAY or anything else.
    DYNAMIC RANGE (it is kind of switching of channels) activates simultaniously with LS2, it works every time.
    REVERB is inbuilt effext in the Guitar Amp.

    I attached my simplified diagram, it doesn't show power supply.
    I tried to run pedals with 9V battery each just to eliminate possible power supply problem.
    It didn't help.
    (IR-remote control modul is just optional, it's not in connected)
     
  4. mik3

    Senior Member

    Feb 4, 2008
    4,846
    63
    It would be better if you show how did you power the device.

    What are the In/Out signals of the LS2 and Delay?

    Does the switch symbol in LS2 and Delay mean that by closing the contact they are activated?
     
  5. sikter

    Thread Starter New Member

    Jan 25, 2012
    23
    0
    Detail diagram for each pedal is water above my head.I am not familiar with electronics.
    Both pedals are powered all the time. Those switches are
    momentary and they just change pedal Circuits internaly.
    Delay is in initial position bypass circuit (buffer) and when you I push switch once it goes to its effect circuit. Everything happens internaly.
    LS2 swaps from circuit A to Circuit B. Each circuit has its volume pot.
    IN is input for guitar signal ( in this case signal comes from guitar amps SEND outputbecause my pedals are connected to amps loop)
    Guitar signal goes through LS2 in to Delay and then back to amps power tubes.
    In my case I can control both pedal pushing directly on them and/or by stepping on switches on floor board. ( so long the cable isn't too long)
     
  6. mik3

    Senior Member

    Feb 4, 2008
    4,846
    63
    I am not familiar with music equipment that is why I am asking many things!

    The only thing I can say is that there is a loose connection or wire or wires with their insulation scratched and they touch when you press the Delay pedal due to the vibration. Sometimes it happens and sometimes not.
     
  7. sikter

    Thread Starter New Member

    Jan 25, 2012
    23
    0
    That was what I thought first but after many, many, cables I realizedsomething had to do with the length. Those pedals share ground and maybe
    Delay pedal takes it not so easy like LS2 does.


    Anyway, I'll use my short cable tomorrow.
    Can you answer my questions about mosfets?
    Would mosfet work properly if I trigger it from 5 meter distance.
    How thick lead has to be then? (Talking about 9V DC mosfet.)
     
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