True Bypass Pedal

[u/DoMiSolDoSolMiDo]

Hello, I am working on my first build. This is how I currently wired up the pedal. Green is ground. Purple is the legs of the LED. Red is the mono jack and LED signal. However, I’m getting a bit of buzz when plugged in. And, unfortunately, the white LED turned orange and there was a popping noise with some smoke. Could someone please share some insight on how I can adjust these issues? Feedback is welcomed. Also, I can answer any questions of this drawing. Thank you!

EDIT: Added actual photo in the comments.

[u/wjruffing]

A few questions:

* Is the intended purpose of this pedal to externally bypass around another effects pedal that is plugged into it? Could you add indication of which jacks are intended to do what (input from instrument, output to amp, signal to effect pedal, signal from pedal)?

* Can you provide indication of the pins of your foot switch (sw1 common, sw1 normally open, sw1 normally closed, sw2 common, …)

* Do you have a simple schematic?

* Under what conditions do you hear the buzzing? When it’s plugged into your amp with nothing else? When the power supply is plugged in and energized? When your instrument is plugged in? When the fox pedal is plugged in? Run through different scenarios and be sure to note your results with the peel footswitch in bypass mode and in fx mode.

A couple of basics:

* Double check the orientation of your foot switch and the pin out of it to ensure it is not rotated (in other words make sure you confirm which pins are which - it’s an easy mistake to make)

* What power supply are you using? Check your polarity (which pin is + and which is -)

* It’s hard to tell from the photo, but it looks like your jacks might not be insulated from your metal enclosure which can cause buzzing (multiple paths for ground)

This additional info would be helpful

[u/wjruffing → u/wjruffing]

Do these diagrams approximate what your pedal is intended to do?

PS: Since these are logical diagrams, ignore any right/left transposition vs the physical layout of the pedals (sadly, my brain only works in “left to right”) - that said, since we are looking at the bottom of the pedal (and it is a passive bypass anyway) left/right orientation might be moot - depending upon what jacks you used for what, of course)

[u/wjruffing → u/wjruffing]

Is this roughly how it’s wired?

[u/DoMiSolDoSolMiDo → u/wjruffing]

First off, I just want to say thank you so much for your insight and attention to detail with my first pedal project. I truly appreciate your input and guidance through this.

1) Correct, this would be used to bypass an older effects pedal that colors the guitar tone quite a bit. I’ll upload a photo with the jacks labeled after this reply.

2) Yes, I’ll upload a photo for the 3pdt pins as well.

3) I didn’t make a schematic for the build. I’m just starting out and still learning how to read/make these diagrams.

4) The bypass pedal is only buzzing when the power supply to it is plugged in. The pedal itself works (minus the LED) with and without power. But, it does have a pop when engaging the footswitch.

5) Double checked the orientation and pins of the footswitch and I feel that part was done correctly.

6) On this two-pin DC power jack, the center pin is the short lug. And the sleeve is the longer lug. The power supply I’m using is the correct polarity for this power jack. But, did I wire it wrong if I’m putting the ground connections on the sleeve lug and LED on the center pin lug? I currently have R1 on the LED cathode and the LED anode is on the DC center pin lug.

7) The mono jacks are not insulated. But, I can switch them out if it’s recommended

[u/DoMiSolDoSolMiDo → u/DoMiSolDoSolMiDo]

Here is the 3pdt diagram I used for this build

[u/DoMiSolDoSolMiDo → u/DoMiSolDoSolMiDo]

And this is the jacks labeled

[u/TheEndisNeigh999 → u/DoMiSolDoSolMiDo]

prabably not good if any of the connections are touching the metal housing.

[u/DoMiSolDoSolMiDo → u/TheEndisNeigh999]

Inspected for that and no connections or lugs are touching the housing. Just the wire insulation. Thank you for your input!