Main components

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Part NumberDescription
MICROFC-30035
AP3012500mA, Adjustable Step-Up Voltage Regulator, 1.5MHz Frequency, SOT-23-5
LT1807
STM32F103C8TxSTMicroelectronics Arm Cortex-M3 MCU, 64KB flash, 20KB RAM, 72 MHz, 2.0-3.6V, 37 GPIO, LQFP48
AP2112K-3.3

sipm schematic

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sipm board layout