ragemachine
Active member
I'll post an MSPaint schematic or a picture if needed, but here's a simple discussion of my problem:
Setup: I have a portable (battery powered) Teensy 3.6+Audio Shield. I am converting 12V-->5V with the Adafruit Traco to power the Teensy/Shield/TFT display, and a 12V regulator powering a Class D Amp/speakers.
Problem: I have a buzzing noise coming out of my speakers when I am powering via Traco.
Troubleshooting: When I power the Teensy via USB (bypassing the Traco) and only have the 12V regulator powered via battery, the buzzing goes away.
Help?
I already have a 47uF capacitor between the Traco PWR IN and GND lines (pins 1 and 2).
I do not have access to an oscilloscope - only a multimeter.
Would it be worth trying to add a capacitor between the Teensy 5V power in pin and Gnd? How else can I smooth the 5V power?
Any other suggestions? Or alternatives to the Traco that might fare better?
Setup: I have a portable (battery powered) Teensy 3.6+Audio Shield. I am converting 12V-->5V with the Adafruit Traco to power the Teensy/Shield/TFT display, and a 12V regulator powering a Class D Amp/speakers.
Problem: I have a buzzing noise coming out of my speakers when I am powering via Traco.
Troubleshooting: When I power the Teensy via USB (bypassing the Traco) and only have the 12V regulator powered via battery, the buzzing goes away.
Help?
I already have a 47uF capacitor between the Traco PWR IN and GND lines (pins 1 and 2).
I do not have access to an oscilloscope - only a multimeter.
Would it be worth trying to add a capacitor between the Teensy 5V power in pin and Gnd? How else can I smooth the 5V power?
Any other suggestions? Or alternatives to the Traco that might fare better?