SainSmart USB 4 Channel DC 12V Relay Module Automation for Arduino Raspberry Pi DSP AVR PIC ARM auspowers_batchtwo foldable panels one-click button

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SainSmart USB 4 Channel DC 12V Relay Module Automation for Arduino Raspberry Pi DSP AVR PIC ARM auspowers_batchtwo foldable panels one-click buttonSainSmart USB 4 Channel DC 12V Relay Module Automation for Arduino Raspberry Pi DSP AVR PIC ARM Overview: This USB Relay Controller Data Acquisition Module allows computer controlled switching of external devices as well as full bi directional communication with the external world (ideal for Data Acquisition applications) using the USB port of your computer. The controller is very flexible and can be used in many custom applications including weather