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.

Monday, January 18, 2016

JHS Little Black Buffer

Here's a simple buffer from JHS. It really only uses one side of the opamp (why not just use a TL071?) and the extra resistors on the other side are just to meet the manufacture's specs for an unused side. I couldn't find a schematic for this one, but drew one up from lvlark's vero layout. I've added polarity protection and extra power filtering to the layout.


at
Labels: , , ,

38 comments:

  1. WiinztaJanuary 21, 2016 at 5:38 PM

    I just finished this little guy. Works like a charm! :)

    ReplyDelete
    Replies
    1. patronaabbyFebruary 4, 2016 at 8:26 AM

      good job bro, can i ask about the ic what is the replacement of TLo72?

      Delete
    2. Effects LayoutsFebruary 4, 2016 at 9:28 AM

      TL072s are extremely common. I guess a 4558 would work too, though probably not as cleanly.

      Delete
    3. нaroldMay 6, 2020 at 3:43 PM

      4558 is better to me, is very clean

      Delete
  2. UnknownMarch 29, 2016 at 7:21 PM

    Hey, I'm pretty new to pedals but though a buffer would be a good place to start. I understand everything except understanding what pins of the IC to use on the upper schematics. Since they aren't labelled how do you know which pin is which?

    ReplyDelete
    Replies
    1. Effects LayoutsMarch 29, 2016 at 8:19 PM

      Google TL072 pinout. Should clear things up for you.

      Delete
  3. patronaabbyMay 2, 2016 at 6:08 AM

    TL072CN will work?

    ReplyDelete
  4. Ramón HerverMay 23, 2016 at 4:27 AM

    Hi man!! Thanks for the info, only one question, how can I add a led to the circuit? To make it like Jhs? Thanks and I'll be waiting for your answer.

    ReplyDelete
    Replies
    1. Effects LayoutsMay 23, 2016 at 10:01 AM

      Run a 4.7k resistor from 9v to the anode (+) of an LED, and the cathode (-) to ground.

      Delete
  5. Ramón HerverMay 23, 2016 at 7:57 PM

    one more question, can i use TL072cn instead TL072? and what type of caps do you recommend?

    ReplyDelete
    Replies
    1. Effects LayoutsMay 23, 2016 at 8:11 PM

      Yes that'll be fine. Film caps are probably best.

      Delete
    2. Ramón HerverMay 23, 2016 at 8:21 PM

      Thanks man! You're the best! greetings from Cholula México!!

      The last one!! Which buffer do you reccomend for fixing Volume Pedal Tone Suck?

      Delete
    3. Effects LayoutsMay 24, 2016 at 7:50 AM

      the Klon Buffer is my personal favorite

      Delete
  6. UnknownMay 24, 2016 at 1:42 PM

    Thanks man! Amazing layout! One question: What's the exact size for the PCB? Thanks!

    ReplyDelete
    Replies
    1. Effects LayoutsMay 24, 2016 at 1:43 PM

      Check out the Transfer Image Library tab at the top of the page

      Delete
  7. Ramón HerverMay 25, 2016 at 2:04 AM

    Hi!!! A doubt (sorry for my questions, I'm a newbie) the 10uF and 47 uF caps are polarized?? The marked side is the positive or negative? Thank you so much man!! You're the best!!

    ReplyDelete
  8. Ramon HerverMay 31, 2016 at 7:13 PM

    i already build this little buffer, but the volume is too low =/ what can i do wrong?

    ReplyDelete
  9. SlavikatorNovember 18, 2016 at 1:06 PM

    Yes, the volume is too low In my case too

    ReplyDelete
  10. AndyMarch 27, 2017 at 12:32 PM

    Hello, how are you? I'm trying to put this buffer in a loop box, but very POP when it's added to a 3PDT circuit. What can it be?

    https://www.gearslutz.com/board/attachments/low-end-theory/354945d1374679650-new-stomp-box-loop-killing-volume-when-off-loopernoled_sml.gif

    ReplyDelete
  11. Effects LayoutsMarch 27, 2017 at 12:35 PM

    Is the buffer between the input and the switch or after the switch?

    ReplyDelete
  12. AndyMarch 27, 2017 at 12:55 PM

    In various positions I have POP.

    ReplyDelete
    Replies
    1. Effects LayoutsMarch 27, 2017 at 12:56 PM

      You could try putting a pulldown resistor at the output of the circuit. There's already one at the input (tho you could try increasing its value). Have you tried using a different switch?

      Delete
  13. f.yanez.d@gmail.comSeptember 9, 2017 at 5:52 PM

    hola amigos, de que punto puedo sacar una señal para poner un led de iluminación para avisar que está encendido el pedal??

    ReplyDelete
  14. GeneralBlotoOctober 2, 2018 at 10:06 PM

    I have a problem. When i plug in the power suply the pedal sounds for about 1 second and then the sound diez. I checked the PCB and soldering and everything seems to be fine. Any advice about that?

    ReplyDelete
  15. Dave25January 20, 2020 at 9:12 PM

    Mine works but it adds noise. Maybe once I box it it'll be better.

    ReplyDelete
  16. DantasMay 20, 2020 at 3:21 PM

    No work. Only make very noise and no sound.

    ReplyDelete
  17. edgar gooiJuly 18, 2020 at 9:16 AM

    Which resistor can i change to increase the output volume? can you please mark it in the schematic?

    ReplyDelete
  18. SlaughterJune 8, 2021 at 5:23 AM

    Hi. Thanks for posting these valuable plans. I have a question about components. I can see a 47uF capacitor in PCB layouts but i can not see it in schematic. Other thing bugging my mind is i look up for other schematics and layouts for this pedal but other plans show 470R (470 ohm) resistor instead 47uF capacitor. Can you clarify these points for me? Thank you.

    ReplyDelete
    Replies
    1. Effects LayoutsJune 8, 2021 at 9:38 PM

      The 47uF cap is for power filtering. I'm guessing the 470Ω resistor is tacked on to the output after the 10uF cap similarly to the Klon buffer.

      Delete
  19. MurnzAugust 3, 2021 at 10:32 PM

    Hello just asking if what is the voltage of 47uf and 10uf in the circuitry

    ReplyDelete
    Replies
    1. edgar gooiJuly 5, 2022 at 1:11 PM

      whatever more than 9V, I usually use 25V for those ones.

      Delete
  20. integralaudioDecember 17, 2021 at 4:11 PM

    it uses 072's because the PCB shares the same layout as the buffered splitter.

    ReplyDelete
  21. edgar gooiJuly 5, 2022 at 1:10 PM

    Which Resistor value do I need to change to increase the output volume? the volume is less a little bit.

    ReplyDelete
  22. cruzerAugust 11, 2024 at 2:52 AM

    is there a chance that you could provide a .diy file of this circuit?

    ReplyDelete

Subscribe to: Post Comments (Atom)