CURRENT MEASUREMENTS

R503 FPM:
ATmega328P:
MOSFET:


FS5106B high-torque servo:

One of them draws 6.1mA when connected and stabilizes at 4.6mA. The other drew
variable amounts initially (4.7mA, 5mA+, but mostly 4.7). Both draw 4.6mA of
quiescent current with a 5.07V supply.

REMARKS

 1. Can't use the 3.3V FPM modules with Arduino Uno. The RX and TX lines have
    resistors.