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.

Tuesday, September 25, 2018

Eazius Tremor

Stumbled across this schematic and it's like CJ's Shoot the Moon and the EA Tremolo had a baby (Though I think this predates the Shoot the Moon...)–the audio path is like the Shoot the Moon and the LFO from the EA Tremolo has been adapted to pulse an LED. Use a 5mm diffused yellow LED and a 2k light/2M dark LDR (or socket and experiment). The trimmer is a gain/volume control. Set to unity and forget about it.

at
Labels: ,

12 comments:

  1. Arnold DikstaalSeptember 25, 2018 at 2:49 PM

    Hmmm, pricy OPA2134. You could substitute it with any good low noise dual opamp I presume (TL071 etc).

    ReplyDelete
  2. Effects LayoutsSeptember 25, 2018 at 3:22 PM

    Yes, pretty much any dual opamp will work, but get a TL072. 071 is a single ;)

    ReplyDelete
  3. Arnold DikstaalSeptember 28, 2018 at 4:56 AM

    Lol, you are right again TL072 :)

    ReplyDelete
  4. mourningwoodOctober 17, 2018 at 5:55 AM

    layout is working sir plase mark as verified.
    I have encountered a volume problem, the volume drops dramatically when the tremolo engaged. Did not find out why but maybe because I had used 2n3904 instead of 5088, maybe because tl082 but the circuit is working as intended. neat and easy build.

    ReplyDelete
    Replies
    1. Effects LayoutsOctober 17, 2018 at 9:07 AM

      The transistor is just used in the LFO, so that won't effect the volume. Did you max the gain trimmer?

      Delete
    2. mourningwoodOctober 19, 2018 at 4:30 AM

      yes, It does give a semi-distorted sound at max cleaner sound at lower levels. But in order to get its sound audible, I increased my amp volume from 2 to 6-7 . I checked my pcb again and I decided to make another one and give it another try. Will inform from here when the secong build finished.

      Delete
  5. mourningwoodNovember 17, 2018 at 4:02 AM

    Made the circuit from start and the second one working as intended.

    ReplyDelete
  6. ZZOYDJanuary 11, 2019 at 3:22 AM

    verified. Work with tl 062,72, Jrc4558.

    ReplyDelete
  7. -^-November 24, 2020 at 10:38 AM

    will 5539 ldr be good?

    ReplyDelete
  8. AnonymousApril 19, 2021 at 6:30 PM

    Would it be possible to incorporate a flashing LED to match the rate and if so how could I go about this?

    ReplyDelete
    Replies
    1. Effects LayoutsApril 20, 2021 at 9:31 AM

      Easiest way would be to put another LED in series with the one on the board (between the Depth pot and LED+)

      Delete

Subscribe to: Post Comments (Atom)