If I change the configuration back to powering the Trinket M0 thru the USB, and then powering the sound board from the USB pin and ground from the Tinket, using the same charger it works just fine. So the boards are just fine. The same problem occurs with a completely new trinket/sound board, and it disappears when I go back to powering it thru the USB-port. I have even tried several different power supplies. I`ll try the batteries tonight.dastels wrote:4.5 to Vin/Vbat should work fine.
Does the Trinket on its own work when powered via Vbat? Maybe try the blink sketch/script to see signs of life. Or maybe with a read the button, light the LED sketch/script.
Dave
I havent tried the Trinket M0 on its own when powered thru Vbat without the sound board attached to see if it will execute the code without errors, I`ll test that when I get home from work today.