Monday, 5 October 2015

Twin Peaks "Tap Tempo" Tremolo

Another great project by David Rolo from Madbean's forum.
You can find all infos about this pedal here:
http://www.madbeanpedals.com/forum/index.php?topic=17253.0
Thanks to Hozy31 for verifying it!
06/11/2015 Layout updated: inverted rotary switch pins.






31 comments:

  1. Very nice. I have been wanting to do a tap tempo and a Tremolo .Your awesome Alex! I cant wait to get it going. I built a swamp thang/tremadillo for a friend ot has a nice warmth to it. this sounds pretty warm as well.

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  2. Great work Alex, however, it needs pointing out that you MUST buy a pre-programmed TAPFLO chip for this build, unless you have the knowledge and the equipment to programme it yourself. If you just buy an "empty" TAPFLO chip, this pedal WILL NOT WORK!

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  3. Good point! I've assumed people would have understood that by reading the Madbean's forum page. Thanks for pointing that out. Better safe than sorry!

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    1. Yes you are right Alex. I thought it was worth mentioning to anyone who was not familiar with this circuit, and had not read the Madbean Forum page first.

      So to ANYONE reading this, who has not come across this great pedal before, PLEASE READ THE FORUM PAGE AND BUILD INSTRUCTIONS ON MADBEAN (LINKED ABOVE), BEFORE YOU START BUILDING.
      It contains all the info you will need to build it successfully.

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    2. You could also have a look here:
      http://www.davidrolo.com/wp-content/uploads/2014/11/Twin-Peaks-Tremolo-2.1-build-doc.pdf
      (Hopefully David won't get too annoyed)

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  4. I do not need the tap tempo feature on this pedal - could I just omit the TAPFLO chip and it's associated circuitry?

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    Replies
    1. I don't think so. All 6 pots connect directly to the TAPFLO, and the TAPFLO generates all the temolo sound functions. Looking at the schematic, I reckon you could easily omit or bypass the tap-tempo function, but you still need the TAPFLO chip.

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    2. And I have just realised that I have been referring to this as a TAPFLO chip instead of a TAPLFO chip. What a dufus! Damn you dyslexia!

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    3. I thought it was TAPFLO for ages. I think it's just the human mind creating a word that is normal for us. I don't have dyslexia, but for ages it just felt wrong to say TAPLFO. DANG IT TAPLFO.

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  5. It's about time this place had another godzilla-sized veroboard. Nice!

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  7. This thing is awesome, I love the demo video. Seems like I need to build this. I already built the harmonic tremolo designed by 1776 effects and love it, but I think I can sell it now :D

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  8. Could anyone point me in the direction of where I can purchase pre-programmed TAPLFOs

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    Replies
    1. http://electricdruid.net/tap-tempo-lfo-taplfo-v2d/ :)

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  10. Fantastic layout Alex!

    Everything fit well and it fired right up in my test jig without issue.

    Sounds like everything is working similarly to the video, although my switch
    positions are in reverse.

    I had assumed the diagram of the switch on the layout was showing pins facing towards you, must be pins facing away. Based on that switch diagram, if you want the switch to work like the video, with the switch fully clockwise, you'll want pins A and 1 shorted and pins B and 5 shorted.

    Here is a picture of the corrected vero for the switch:

    https://photos.google.com/photo/AF1QipMPoebrauTJAM1YGcSpcr5sg-tkSGegLFP2g5hf

    For those who have built this layout, did you need to use shielded wiring?

    I'm getting a ticking sound. The ticking sound gets louder with the shape control counter clockwise. Was hoping boxing it would help with the ticking, it didn't.

    I currently have the input, output, TAP switch and TAP LED wires all running together down the right top side of the board. Maybe an issue? (I did have some ticking in my test jig too, with the input/output wires fairly well separated from the TAP switch wires, so maybe not?)

    Here is a picture:
    https://photos.google.com/photo/AF1QipNMAy9eS9Dg3KcEPkR-RjeSkTA768-LRhuwMECP

    (Yes, I know I somehow goofed the input wiring on the 3PDT, will have to fix that tomorrow too! How does one make such a silly mistake like that after building so many pedals???)

    In the build doc it said C1 may be needed to counter this ticking. Is shielded wiring needed too?

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    Replies
    1. Thanks Michael!
      I've updated the layout.
      I haven't built it myself but I usually get ticking when the rate pot is too close to the Output (don't know if this is the case).
      Shielded wires may help.

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    2. Thanks, so with the new switch numbering on the board, the switch diagram shows the pins facing you and fully CW (treble only mode) switch pins A & 4 are shorted and pins B & 8 are shorted.

      I'll need to update the mini switch vero I posted to match the new numbering on the board.

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    3. ok, I've updated the numbering on the mini switch vero.

      https://photos.google.com/photo/AF1QipPt6pUMgd009v3pyzSJKo7kx3_7dyI5XOsnzxLA

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  11. Minor layout suggestion:

    Make room so a small 3x3 chunk of the board can be removed at the top corners.(3x3 lead holes) This will allow the board to slide up between the screw stays and will add just a little more room down below.

    Not necessary as everything fit comfortably in a 1590BB, and the mini switch will fit under the main board with some insulation if desired, but the extra room may be helpful if you don't want the switch under the board, and want a little more room between the rotary switch and the stomp switches.

    Here is how I will do it on my next build.

    Move the Tone 3 cut 1 space to the right, move top left 15k resistor 3 columns to the right. This will allow cutting out a 2x2 or 3x3 chunk from the top left corner of the board.

    As is, you can cut out a 2x2 from the top right corner. But if you move the high pass trimmer, the cut underneath, the top right link and top right 100R all to the left 1 column each, this will allow cutting out a 3x3 chunk from top right corner of the board.




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  12. Haven't been able to eliminate the ticking when using the square wave shape.

    Depth fully CW, Shape on "square wave" (10 o'clock) and the other controls at noon. Both T3 and T4 are fully CCW.

    It almost goes away with a 2u2 NP for C1 and the depth control backed off before noon.

    I've tried another TAPLFO, and swapped the NE5532 with a TL062 and TL022. No improvement.

    The rest of the settings sound great, similar to the video.

    Does anyone else have this ticking issue?

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    Replies
    1. Bump :0)

      Has anybody built a tick-free one of these?

      Would like to compare settings if possible.

      Thanks

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  13. I'm building one at the moment, I still need to wire it. I could not open your image of the rotary vero so I've also made a layout and am orientating the parts to fit in a 1590BB:

    http://i304.photobucket.com/albums/nn175/H_A_M/DIY/Twin%20Peaks%20Tap%20Tempo%20Tremolo/Mini%202P4T%20vero%20board_zpsly0f2twt.png

    http://i304.photobucket.com/albums/nn175/H_A_M/DIY/Twin%20Peaks%20Tap%20Tempo%20Tremolo/TPeaks%20Vero%201_zpsnkwphrlx.jpg

    I hope to finish it soon

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    1. Nice.

      Hope to compare notes as my pedal sounds great, pretty much just like the video until I engage the square and up ramp shapes.

      Not sure if it's a layout issue, component issue, wiring issue or simply that I don't yet have any VTL5C1s.

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  14. "Square" and "Up Ramp" ticking solved!

    I'm convinced my build had 2 issues causing ticking. I resolved both as follows:

    1. C1 (C22 on the schematic) 47n was enough to resolve the predominant ticking.
    2. Shielding both input and output wires. This resolved a more faint ticking that was unaffected by higher values for C1 (C22).

    Picture of my ghetto shielding (aluminum foil) on page 7 here: http://www.madbeanpedals.com/forum/index.php?topic=17253.90

    It is now dead quite and sounds awesome!

    I ended up using GL5516 LDRs and super bright white LEDs. Since I used super brights, I also lowered the volume trimmer to 10k so I could dial in unity a bit easier.

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  15. Is this layout using two 78L05s or is one supposed to be a 78L06?

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    Replies
    1. Ah. I see that he has a newer build doc with a new schem that uses 78L05. Never mind.

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  16. Hey! hi how is it? I don´t have a good english but i understund a few things. I have a question about this pedal, it´s about the TAP LFO. How can I prgram it? Wich plataform do I use? Do I need a software? If yes, could someone help me to program this TAP LFO? Thanks Guys

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  18. If I use the standard tremolo mode
    (black), there is some high pitched white noise. I used the trimpots
    to get rid of it, but now the other modes are pretty dark tone-wise.
    Do you know how I can fix this?

    Also, when the rotary knob is used to switch among the modes, is it
    supposed to "thump" when switching?

    Thanks for your help.

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