Fig. 4
From: An open-source platform for sub-\(\textrm{g}\), sub-\(\upmu\)A data loggers
BitTag circuit. Circuit illustrating the major components of a BitTag including the processor (stm32l4), real-time clock (rv-3028) and accelerometer (adxl392). The processor reset pin is isolated from the interface with an NPN transistor (Q). Power is supplied by battery (B). The internal voltage (\(V_{CC}\)) is separated from the battery voltage (\(V_{bat}\)) by a Schottky diode (D). Only a single load/decoupling capacitor (\(C_L\)) is illustrated. Various passive devices and supply/ground signals to the block components omitted for clarity