The 2N3703 is a PNP Transistor with VCE of -30V and a collector current of 500mA.

The SAMB11 is an ultra-low-power Bluetooth SMART (BLE 4.1) System on a Chip with Integrated MCU,

IRF530 is an N-channel MOSFET designed for high-speed and high-power applications.

BC817 Pinout Configuration

IRF9540 is a P-channel MOSFET that can drive maximum load current up to -19A and voltage up to -1

MCP4725 IC from Microchip Technology, is a Single Channel, 12-Bit Digital-to-Analog Converter with integrated EEPRO