Hello,
I have been having trouble making teensy 4.1 to work reliably.
On 2 separate projects I had teensies dying for no apparent reason. (6 in total)
On one project we designed a pcb where the teensy reads a couple of pwm signals and retransmit them , a couple of can transceivers and using a couple of serials.
All signal coming in from a flight controller are 3.3v so no problems there. Teensy is powered by a custom buck converter using TI parts and is basically the exact same design as in the datasheet of the main converter (12V->5V). VIN pads underneath the teensy was cut so that we could use usb SERIAL. Some of the teensies work, others die immediately others fail for no reason. I have been monitoring the 5v rail and I can confirm no spikes or over voltages occur.
Using a Teensy 3.5 or 3.6 works perfectly.
Then again I made for personal use a couple of pcbs of the kicksid( dual sid replacement for c64) project that uses 4.1, and then again 2 teensies are gone. Checked for shorts, overvoltages prior connecting teensy but nothing there. Still they failed immediately.
Most of the teensies wont recover using the 15sec reset recovery method. But after a few days some may recover using the same technique.
My best guess so far is that Teensy 4.1 can be "picky" on the power supply and it can fail under certain conditions.
Any insights are welcome.
I have been having trouble making teensy 4.1 to work reliably.
On 2 separate projects I had teensies dying for no apparent reason. (6 in total)
On one project we designed a pcb where the teensy reads a couple of pwm signals and retransmit them , a couple of can transceivers and using a couple of serials.
All signal coming in from a flight controller are 3.3v so no problems there. Teensy is powered by a custom buck converter using TI parts and is basically the exact same design as in the datasheet of the main converter (12V->5V). VIN pads underneath the teensy was cut so that we could use usb SERIAL. Some of the teensies work, others die immediately others fail for no reason. I have been monitoring the 5v rail and I can confirm no spikes or over voltages occur.
Using a Teensy 3.5 or 3.6 works perfectly.
Then again I made for personal use a couple of pcbs of the kicksid( dual sid replacement for c64) project that uses 4.1, and then again 2 teensies are gone. Checked for shorts, overvoltages prior connecting teensy but nothing there. Still they failed immediately.
Most of the teensies wont recover using the 15sec reset recovery method. But after a few days some may recover using the same technique.
My best guess so far is that Teensy 4.1 can be "picky" on the power supply and it can fail under certain conditions.
Any insights are welcome.