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The power supply is 4.5V ~ 5.5V, 3.3V voltage regulator circuit board
Communication interface is a standard SPI interface
Micro SD Card Reader Module also called Micro SD Adaptor is designed for dual I/O voltages. This Module is a simple solution for transferring data to and from a standard SD card. The pinout is directly compatible with Arduino, but can also be used with other microcontrollers. This module has SPI interface which is compatible with any sd card and it use 5V or 3.3V power supply which is compatible with Arduino UNO/Mega.SD module has various applications such as data logger, audio, video, graphics.
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Biometric Pulse Rate or Heart Rate detecting sensor
Plug and Play type sensor...
Single-Supply Operation (2.7V to 5.5V)
High-Resolution Conversion of Light Intensity ...
Power Supply: 5 Volts
Interface Type: Analog & Digital
High Sensitivity to ...
Operating voltage 3.3V-5V
Outputs digital switching output (high and low level 0 and ...
PROFESSIONAL EKG-EMG CABLE WITH SNAP CONNECTOR FOR GEL ECG ELECTRODES