This is a library of perfboard and single-sided PCB effect layouts for guitar and bass. I'm not an electrical engineer by any stretch of the imagination, just a DIY'er who likes drawing layouts. It is meant for the hobbyist (so commercial use of any of these layout is not allowed without permission) and as a way to give back to the online DIY community.

Friday, January 27, 2017

Dwarfcraft Shiva

This week's Fuzz Friday layout is the Dwarfcraft Shiva. It's a unique fuzz that can deliver wicked, buzzy fuzz tones. The toggle switches turn on and off LEDs in the 2nd and 3rd stages of the circuit, and the Starve switch bypasses the Starve pot. I've laid it out to fit in a 1590B if you don't want to include the starve footswitch, though you could probably squeeze it in that size.


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16 comments:

  1. Sal.C.February 2, 2017 at 2:20 PM

    Thanks for PCB , is very explicit , but one question , i don't undestand how to insert by pass starve's switch, can you explane please ? thanks

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  2. Michael GalanFebruary 2, 2017 at 7:40 PM

    i dunno if your addressing the question to anybody. but i was to answer this i would suggest you put a spst switch accross starve bypass and to your power 9v it simple bypasses the pot. the pot is just acting as a rheastat varying resistance from your 9v power before it goes into the circuit so by adding a switch it will allow the full 9v to go into the circuit

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  3. Sal.C.February 3, 2017 at 7:14 AM

    Foremost Thanks for the answer, and if I understand correctly i connect ( i prefer the 2pdt or 3pdt switch)the footswitch to by pass starve in the PCB and positive to power 9v ?
    Thanks

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  4. P. M.February 6, 2017 at 5:35 AM

    all Boris fan will be happy with this one.
    Is it verified ?

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  5. UnknownMarch 15, 2017 at 9:55 AM

    Sir, can you explain where the switches are connected? (SW A1-A2, and SW B1-B2) and the byspass starve too i dont know where to put it. thanks.

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    Replies
    1. Effects LayoutsMarch 15, 2017 at 11:28 AM

      SWA refers to the first column of a DPDT toggle switch, and SWB refers to the second column. For the starve switch, use a DPDT footswitch. Wire the dc jack + (or battery +) to the middle lug (2) of the first column. Wire the top lug (1) to the +9v pad on the board, and the bottom lug (3) to the starve bypass pad on the board. Then use the 2nd column to wire an on/off LED indicator.

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    2. UnknownMarch 21, 2017 at 11:34 PM

      thanks, is it 2 dpdt switch or one only for the swA and swB?

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    3. Effects LayoutsMarch 22, 2017 at 9:30 AM

      It's just one DPDT. A refers to one column of lugs and B refers the the other.

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  6. jojo ZhangAugust 6, 2018 at 11:04 PM

    I can use 2 DPDT for A and B？

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  7. jojo ZhangAugust 7, 2018 at 12:27 PM

    At present, there is a problem that bothers me. When I use starvation in the case of octave, there will be annoying "popping" sound, and when using octave, the fuzz effect will be much weaker, whether it needs to use 5mm red led? How should the specific DPDT foot switch be connected?

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    Replies
    1. Effects LayoutsAugust 7, 2018 at 1:10 PM

      The popping is probably due to the transistors being starved and thusly unbiased. Extra noise and weirdness is kind of expected with this style of fuzz–it's not all that stable of a circuit. 3mm LEDs should be just fine. As for the footswitch for bypassing the starve pot, wire the positive lug of the DC jack to lug 2, the +9v pad from the board to lug 3, and the Starve Bypass pad to lug 1. Use the other side of the DPDT footswitch for on/off LED indication. Reference the General Layout Notes tab for correct switch lug numbering.

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  8. jojo ZhangAugust 7, 2018 at 11:33 PM

    thank you very much！！

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  9. JDTDecember 11, 2018 at 8:23 PM

    Verified.
    No squealing or oscillation in mine, but it does do sputtering, gated, lo-fi fuzz.
    An audio taper pot might be better for the texture knob. There is a small spot early on in the rotation you need to dial in just to get decent volume in some settings. Also, there is not much going on in the last half of the rotation.

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  10. James JJuly 11, 2021 at 7:49 AM

    2 People have asked this and not gotten answers. I guess I'm now the third. How do you wire the STARVE BYPASS at Column 7 Row B?

    ReplyDelete

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