This evening I attached the dx4e module to the completed PCB, and installed it into the DM9 module case. I attached the module to the Taranis. I powered up the Taranis, and I didn't smell any smoke, which I took to be a good sign.
I downloaded an eepe for a Blade NanoQX, and used Companion to move it to my Taranis. I reviewed the downloaded model for a few minutes. When I went to set up the radio, I selected DSM2 - DSMX. I attempted to bind to my nanoQX with no success.
A couple of minutes later my Taranis started to reboot. It did this twice, so I powered it off and removed the module. I powered it back on, and the Taranis seemed normal. No rebooting. I re-inserted the module, and the Taranis would start to reboot after about a minute.
Any ideas? I looked over the order and alignment of my components, and the only ones that I could not confirm were the capacitors. A little Googling led me to believe that these small, ceramic capacitors are not polarized and can be installed in either direction.
https://learn.sparkfun.com/tutorials/po ... capacitors
I used the continuity checker of my multimeter to check for adjacent pins being connected via a bad soldering job, but it all seemed OK.
Any ideas? The rebooting which stops after the module is removed certainly points to a hardware issue in my module. I did have it installed in the operating Taranis for close to 30 minutes before it started rebooting, so maybe there is some configuration related issue here too.