Hello all!
Today I noticed a very strange issue with my relatively new Teensy 4.1: When I switched from USB power to external power I noticed that there is 4.8V on the 3.3V pins. Before attaching external power I disconnected the USB cable of course.
When applying less than 5V to Vin, the 3.3V pin also reads lower voltage until Vin is approx. 4V. Then I read 3.3V on the 3.3V pin next to Vin, while the one on the other side of the board is about 0.2V lower. The weirdest thing about all this: My Teensy still works, as far as I can tell. Everything else I read in this forum indicated that a voltage on these pins only a little higher than 3.3V instantly fries the whole board.
I tested it without anything attached to the board with a multimeter and an adjustable bench power supply. When on USB power, everything is as it should be, just not when applying external power.
How can this be? Should I be worried or just carry on since the Teensy apparently doesn't really care?
Thanks in advance!
Today I noticed a very strange issue with my relatively new Teensy 4.1: When I switched from USB power to external power I noticed that there is 4.8V on the 3.3V pins. Before attaching external power I disconnected the USB cable of course.
When applying less than 5V to Vin, the 3.3V pin also reads lower voltage until Vin is approx. 4V. Then I read 3.3V on the 3.3V pin next to Vin, while the one on the other side of the board is about 0.2V lower. The weirdest thing about all this: My Teensy still works, as far as I can tell. Everything else I read in this forum indicated that a voltage on these pins only a little higher than 3.3V instantly fries the whole board.
I tested it without anything attached to the board with a multimeter and an adjustable bench power supply. When on USB power, everything is as it should be, just not when applying external power.
How can this be? Should I be worried or just carry on since the Teensy apparently doesn't really care?
Thanks in advance!