Finished Pieces

Echo Bender V2

    The V2 Echo Bender is functionally the same as V1.
    Changes in the V2 are:
    -Hand made steel housing with hard wood end panels
    -Battery compartment
    -Roll bars to protect controls<

    The Echo Bender is an echo, distortion and experimental, stand alone noise generator.
    It’s capable of creating smooth, clean echos as well as delving deep into screeching, noisy realms seldom heard from a traditional echo pedal. See video samples below.


    -Coarse pitch
    -Fine pitch
    -Wet volume
    -Dry volume
    -Feedback/distortion amount. SEE NOTES ON FEEDBACK BELOW

    -True bypass foot switch
    -Effect activation indicator LED
    -9 volt DC Power jack
    -9 Volt Battery compartment
    -1/4″ Switching input jack (conserves battery power by switching off power when plug is empty)
    -1/4″ Output jack
    -External power supply included. Input 120AC, output 9Volts DC. 200mA



    This is a diverse effect which can be used to generate squealing feedback, sub-octave pitch tracking effects and harsh distortion.
    Please see the videos on the Echo Bender page for some examples of how this feature can be used.
    Here’s a quote from an Echo Bender owner about the feedback feature:
    “What interests me most about this pedal is the feedback knob and the decay knob. When you turn these two knobs simultaneously, you get an extraordinary synth/noise sound that is beyond compare! With the rate knobs all the way up, the feedback and decay knobs become a mini version of a mod synth if used correctly. The possibilities are endless!”

    the following videos were shot using the Echo Bender V1. The V2 looks slightly different but functions the same. Everything you hear in the following videos can be done using the V2.


    Sorry, no sound files for this piece.

    39 Responses to “Echo Bender V2”

    • 1

      Christian said:
      October 1st, 2009 at 5:39pm #

      Very neat project! I don’t suppose we could get a step-by-step on constructing the housing? I’d love to know how to fabricate with steel like that.

    • 2

      Jon said:
      October 6th, 2009 at 10:27pm #

      When’s this available and how much?

    • 3

      Emily said:
      March 21st, 2010 at 5:05am #

      I would love to build/have/buy one of these. Is there any possibility that this will become available in the near future?

    • 4

      casper said:
      April 11th, 2010 at 1:09pm #

      @Emily: I think the echo benders time has come and gone. I will try to post the schematics asap.

    • 5

      elric said:
      April 26th, 2010 at 8:49am #

      i love this effect!!

      and i want to say like Emily

      Why can i build/have/buy one of these?

    • 6

      SMSD said:
      May 8th, 2010 at 8:57am #

      Tasty sounds. I’m joining the queue for the schematics.

    • 7

      Nick said:
      June 7th, 2010 at 12:21pm #

      It seems a lot of the “soundscape” effect comes from turning the pots as you play. Could you make a version with slide resistors instead of pots and put them on foot pedals so you can manipulate them as you play?

    • 8

      fat0wl said:
      June 13th, 2010 at 11:43am #

      yeah, schematic!! very cool of you to offer, would love to build one. funny youre based in troy now, i left there for nyc around the time you left nyc for troy. say hi to scully for me!

    • 9

      How to Make Your Own Delay Pedal | DO IT: Projects, Plans and How-tos said:
      July 15th, 2010 at 12:18pm #

      […] schematic is largely (read: almost entirely) based upon Casper Electronics’ EchoBender pedal, which is in turn largely based on Tonepad’s Rebote 2.5 Delay pedal, which is in turn, more […]

    • 10

      Guitarist and Musician Project: Make Your Own Digital Delay Pedal | said:
      July 30th, 2010 at 3:54am #

      […] schematic is largely (read: almost entirely) based upon Casper Electronics’ EchoBender pedal, which is in turn largely based on Tonepad’s Rebote 2.5 Delay pedal, which is in turn, more […]

    • 11

      wizardsofzen said:
      January 5th, 2011 at 4:58am #

      Princeton Labs PT2399 Echo IC… just google that, pick a schematic… (Echo Base, Space Base)

    • 12

      Eli said:
      January 12th, 2011 at 4:55pm #

      So is there any news on the Echo Bender schematic? I would really love to try my hand at it and all the videos sound amazing.

    • 13

      Elijah said:
      January 14th, 2011 at 3:31pm #

      Any news on that scematic? I would to have one of these.

    • 14

      Amberclock said:
      January 26th, 2011 at 7:24am #

      Another request here, too (: Pretty please, with knobs on top? ^^

    • 15

      casper said:
      February 9th, 2011 at 5:40pm #

      schematic uploaded. Sorry for the long wait!

    • 16

      Eli said:
      February 26th, 2011 at 1:01am #

      thank you for the schematic, can’t wait to start

    • 17

      jono said:
      March 6th, 2011 at 5:18pm #

      on the schematic it has you running to 9v and 4.5v and 5v. any short explanation if you got time. thanky….

    • 18

      Eli said:
      March 14th, 2011 at 3:50pm #

      has anyone attempted this? I am kind of absent minded and if anyone has put together a complete parts list I would love to see it. I am just afraid to start ordering the parts and realize that I don’t have them all when I start assembly. I realize that I could get it all off the scematic but i already messed up once copying them and I am afraid to start.

    • 19

      Chris L said:
      October 12th, 2011 at 6:14pm #

      There is a reference to this page from this one – and there is a parts list there … bad or good?

    • 20

      mrmrshoes said:
      October 16th, 2011 at 6:10pm #

      the voltage in to the circuit is 9v dc this is then halfed between two 10k resistors and a cap so you can use a dual supply op amp (Tl072) the 5v is for the the delay ic this is obtained with the use of a 5v voltage reg

    • 21

      mrmrshoes said:
      October 17th, 2011 at 10:31am #

      To anyone how is going to build this FX, i recommend that you use the updated schematic from the make mag Blog.

      I’ve just breadboarded it and its all good like.
      they is even a handy parts list if ya need one

      by the way pete top notch work. i’m loving this circuit’s mods. Keep up the good work.

    • 22

      mrmrshoes said:
      October 21st, 2011 at 8:27pm #

      Hello Pete

      I’ve done two PCB layouts of the echo bender. One with basic in/out layout and one with True By-pass that use’s a DPDT switch and pcb mounted hardware. I’ve built the more basic layout to-day and its working.(Happy-Days)
      I can share it if you like. Let me know and i’ll send you the art work.


    • 23

      Lucas said:
      March 10th, 2012 at 3:59pm #

      @mrmrshoes: could you please sent me the second pcb layout to I urgently need it and I’m not to experienced with PCB Software. Please, I would very much appreciate it.

    • 24

      DOS said:
      April 13th, 2012 at 2:16pm #


      I would like to see your PCB layouts! I want to get custom PCB made and having a place to start for the design would be very helpful!


    • 25

      Christian said:
      April 24th, 2012 at 11:07pm #

      I was wondering if anyone knows where I can add/replace a 20k resistor slider to control the volume input. I am building this delay pedal in this casing and would love to use the original slider.



    • 26

      casper said:
      April 25th, 2012 at 12:56pm #

      you can replace the volume pot in the schematic above with your 20k pot. It will work just fine.

    • 27

      lightwolf said:
      May 4th, 2012 at 4:20pm #

      @ mrmrshoes -or- to anyone else who has created a sucessful PCB for the echobender v2,

      I’ve finally acquired all the components for this build and am about to etch a plate! I would be forever grateful if someone could send PCB art my way to help save me some time and stress–


    • 28

      Nick said:
      June 12th, 2012 at 7:04pm #

      Hey I might be a big dummy but where’s the status LED in the schematic and how is that working with true bypass and only a DPDT?
      Love you guys

    • 29

      casper said:
      June 16th, 2012 at 11:21am #

      Hey Nick,
      you’re not a dummy! The LED is not shown on the schematic. sorry.
      The DPDT switch is a stomp switch. This is the most common kind of true bypass-ing. its a big metal button that you push on and push off.

    • 30

      Danimal said:
      June 20th, 2012 at 3:26pm #

      Hi, I am currently transfering this to a layout (in DIY Layout Creator) – I have a question concerning the left-most TL072, doesn’t it need 9v power and grounding as the right one?

    • 31

      mrmrshoes said:
      June 23rd, 2012 at 6:14pm #

      Hello chap’s

      Sorry about the delay, just saw the interest in the PCB
      anyway here is the download link

      I’ve built the Basic In-Out PCB and its working a treat.
      I’ve not got round to building the PCB hardware version so etch this at your own risk. It looks good (just checked the schematic and layout) but you can never tell until you build and trouble shoot.

      All off board wiring uses 0.1 PCB connectors (POTS,DPDT) but wire will work all the same

      Check out PCB-Hardware Schematic for DPDT switch wiring

      The eagle CAD files are included so tweek to your liking.

      love and kisses


      Casper Awesome mods like

    • 32

      DOS said:
      August 10th, 2012 at 3:56pm #

      Awesome! Thanks mrmrshoes. Now I just need to get in gear and build this thing!

    • 33

      Mr. Joshua said:
      October 19th, 2012 at 6:08pm #

      LOL!! the schematic allows for fine and CORPSE adjustments!

    • 34

      casper said:
      October 23rd, 2012 at 7:35am #

      @Mr.Joshua. Yeah my friend who made the schematic had a morbid sense of humor 🙂

    • 35

      Echo Bender | Marcel Schmidt said:
      April 17th, 2014 at 4:43am #

      […] year ago I built a effect pedal based on the Echo Bender by Casper Electronics. The schematic can be found here and an Instructable of an Echo Bender clone […]

    • 36

      Brian Barton said:
      May 27th, 2014 at 8:20pm #

      Is resistor #19 a 4K value with the 7 being a typo? Thats what I am assuming at least.

    • 37

      Nick Corbo said:
      December 19th, 2015 at 8:53pm #

      I know the last person to post on here was over a year ago but it’s worth a shot.

      Has anyone making this put a heat sink on the LM7805? It typically calls for one but I can’t tell if anyones actually doing it or if it’s required.

    • 38

      casper said:
      December 20th, 2015 at 9:03am #

      hey nick. I cant imagine its really necessary. Heat sinks help in high current circuits. which this isnt. If you feel the regulator getting very hot you can add one, but again i doubt its necessary.

    • 39

      Nick Corbo said:
      December 20th, 2015 at 11:39am #


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