The level conversion circuit board that can interface level is 5V or 3.3V support SD card, SDHC card (high-speed card) Power supply is 4.5V ~ 5.5V, 3.3V voltage regulator circuit board Communication interface is a standard SPI interface
Communication interface is a standard SPI interface; 4 M2 screw positioning holes for easy installation
Control Interface: A total of six pins (GND, VCC, MISO, MOSI, SCK, CS), GND to ground, VCC is the power supply, MISO, MOSI, SCK is the SPI bus, CS is the chip select signal pin
Level Conversion Circuit: SD card into the direction of signals into 3.3V, SD card toward the direction of the control interface MISO signal is also converted to 3.3V, general AVR microcontroller system can read the signal
Control Interface: A total of six pins (GND, VCC, MISO, MOSI, SCK, CS), GND to ground, VCC is the power supply, MISO, MOSI, SCK is SPI bus, CS is the chip select signal pin
