davidus

@skpang, full schematic is attached one post up. The wall adapter was good, 5VDC. We tried several of them as well. We nuked maybe 5 teensies with different setup running the PWM out code - some going through wall adapter, some even powered from...

@kd5rxt-mark , I only power the teensy via 5VDC. All the 3v3 pins on the teensy are floating; nothing is applied to them. As @Fluxanode said, the 3V3 rail is for other ICs (namely the RS422 transmitters). Schematic is attached.

Hi Mark, All grounds are common. The 3V3 comes from an LDO which gets power from the 24VDC to 5VDC buck converter which powers the Teensy. There are two things on the PCB - ethernet socket for the teensy, and then RS422 transmitter which takes...

Thank you for your response. This has happened both on a buck converter like this one (LM65645RZTR) as well as from a 5VDC "wall adapter" which is plugged into the micro-USB port. It doesnt seem to matter how I power it. It fails after...

Hi everyone, We are running into a recurring issue where our Teensy 4.1 boards are suffering fatal hardware damage after running for a period. We have destroyed 4-5 boards under the exact same conditions, so this is not a one-off defect...