Hello guys, I hope you can help me!
I wanted to improve my use of Eagle and I had some PCB fabricated for a compressor circuit.
The effect works well except for a little pop noise (actually it's more a "tick" than a "pop") when I switch on the effect.
I'm sure it's the LED, because if I disconnect it from the ground (so that it doesn't light up) there's no noise at all...
I also tried to add a cap and other limiting resistor as shown on Muzique website, but nothing changes...
I'm using a high brightness white led with a 15k limiting resistor tied directly to 9v dc jack (before the diode polarity protection). The negative side of the led is tied to the 3pdt.
I'm wondering if the size of the 9v and ground traces (that go to/from the LED) are somehow related to this... actually the size is 10mils for the ground trace and 15 mils for the 9v.
Could it be due to the LED quality? I used one from China... not the best source I admit...
If so, what LED would you suggest me?
Can someone help me?
Thank you very much!