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LM2596 DC DC Step Down Converter Voltage Regulator LED Display Voltmeter 4.0~40 to 1.3-37V Buck Adapter Adjustable Power Supply

LM386 Mini Audio Amplifier DIY Kit 3.5mm 3V-12V Power Amplifier Suite Trousse Amplificador Module Board Beyond TDA2030

88-115MHz FM Transmitter Module with Microphone DC 2V 9V 9mA Wireless Car FM Radio Trasmitter Board for Arduino Phone DIY

LM2596s DC-DC step-down power supply module 3A adjustable step-down module LM2596 voltage regulator 24V 12V 5V 3V

3.7V To 12V Mini DC-DC Boost Module Supports 5V/8V/9V/12V Output Lithium Battery Boost

10PCS LM7805 L7805CV/L7806/7808/7809/7812/7815/7818/7824 TO-220 Transistor Voltage Regulator 

1pcs MB102 Breadboard Power Supply Module 3.3V 5V Solderless Bread Board DIY for Arduino

CJMCU-9548 TCA9548A 1-to-8 I2C Multi-Channel Expansion Board 8 Channel Expansion Board I2C Module Development Board For Arduino

PL2303 PL2303HX/PL2303TA USB To RS232 TTL Converter Adapter Module with Dust-proof Cover PL2303HX for arduino download cable

High-power ULN2003 Stepper Motor Driver Board Test Module For Arduino AVR SMD