5Pcs SD Card Module Mini TF Card Reader Sensor with SPI Interface Onboard Level

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Precise Atmospheric Pressure Sensors Module With I2C SPI Interfaces 3.3V/5V

Relay module board with opto isolation for microcontroller

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1PCS NEW STM32F103RET6 chip 32-bit microcontroller

5PCS NEW STM8S003K3T6C microcontroller chip IC 8-bit microcontroller