I am in the process of building a test box with an audio probe, and I have been loosely following the design at this link: http://tagboardeffects.blogspot.com/2014/09/test-box-20.html?m=1
My layout was a little different, so I improvised a bit with the 3PDT and DPDT pins. The box seems to be working and doing its job, but I noticed something odd: when disconnected from an external breadboard, and the effect switch is “engaged”, the audio out plays a very quiet form of the raw input sound. Even when unpowered, the pedal does this. When the effect is “off”, the pedal behaves as expected in bypass, but when it is switched “on”, it does the same thing as before and plays a quiet form of the raw sound.
Without going into too many of the wiring details here, does this indicate a general issue/solution? Does it seem like a problem with the wiring of the switches? A grounding issue? I am new to this, and I appreciate the info! Thanks.
My layout was a little different, so I improvised a bit with the 3PDT and DPDT pins. The box seems to be working and doing its job, but I noticed something odd: when disconnected from an external breadboard, and the effect switch is “engaged”, the audio out plays a very quiet form of the raw input sound. Even when unpowered, the pedal does this. When the effect is “off”, the pedal behaves as expected in bypass, but when it is switched “on”, it does the same thing as before and plays a quiet form of the raw sound.
Without going into too many of the wiring details here, does this indicate a general issue/solution? Does it seem like a problem with the wiring of the switches? A grounding issue? I am new to this, and I appreciate the info! Thanks.
