emmanuel63
Well-known member
Hello,
I have made a few Teensy synthesisers. Almost every time, I had a hard time isolating digital noise from audio signal. I try to follow basic rules about decoupling and PCB design. But I am not an expert and this is a difficult art...
I have noticed that displays induce a lot of noise. I have tried I2C OLED displays and TM1637 7 segments 4 digits displays. Both of them induce a fair amount of switching noise. Even with big capacitors, you can hear some remaining noise.
Do you know "quiet" displays that doesn't use fast switching circuits (like charge pump for OLED) ? LCD ?
Emmanuel
I have made a few Teensy synthesisers. Almost every time, I had a hard time isolating digital noise from audio signal. I try to follow basic rules about decoupling and PCB design. But I am not an expert and this is a difficult art...
I have noticed that displays induce a lot of noise. I have tried I2C OLED displays and TM1637 7 segments 4 digits displays. Both of them induce a fair amount of switching noise. Even with big capacitors, you can hear some remaining noise.
Do you know "quiet" displays that doesn't use fast switching circuits (like charge pump for OLED) ? LCD ?
Emmanuel