Question about LED circuit noise bleeding into the audio circuit.

[MTK]

What's up, guys? I've got a question about noise when using LED circuits in pedals. Specifically a fading/pulsing LED circuit using a 555ic.



The first time I used it, you could hear it charge up and drain and it clicks at the end of the cycle. I found this https://forum.allaboutcircuits.com/threads/clicking-in-audio.22207/ and by adding in a cap across pins 1 and 8 it's almost silent; practically no charge/discharge noise and the click is all but gone. You only really hear it when the guitar volume is off while the pedal is on and even then it's really low. But if you've got that LED pedal in front of another pedal that's got high gain, it picks up in the noise a lot more than just the pedal with the LED effect. I hope that makes sense.

Get to the question, dummy!

Is there a way to isolate these things so that they don't hear each other?