I removed the voltage regulator on a couple moteino's (I also connected Vin to Vout between the Moteino's voltage regulator solder pads), and now both of them exhibit the same strange behavior. Basically, both work fine if I power them from Felix's FTDI connector (set for 3.3v). However, if I power them by battery, then very often it will either freeze or reboot as a consequence of initializing the flash memory. If I don't use flash memory, they seem to work fine.
Looking at the Moteino R4 schematic, it does look like there are some capacitors used with the voltage regulator when it was there: 1 0.1uF, a 10uF, and a 1uF capacitor (
https://github.com/LowPowerLab/Moteino/blob/master/R4/MoteinoR4_schematic.pdf) Should I remove them as well now that I've removed the voltage regulator? I'd like to be able to run a Moteino directly from a 3v battery source (two AA's in series).
Has anyone else run into this?