AD/DA Extension Board PCF8591 GPIO 3.3V 5V for Raspberry Pi 4B/3B+/3B

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Specifications:
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a??Size:65*56*24mm??
a??Weight:27g
Pins: Raspberry Pi GPIO
Output Voltage: 3.3V/5V (IO VCC:3.3V)
Analog Port:
-Input:4 Analog inputs are converted to Digital AD input
-Output: Digital input simulated to Analog DA output
Digital Port: 27 Digital IO
I2C: 3 Way I2C(BCM2,3)
Serial Port:1 Way Serial Port(BCM14,15)
SPI: 1 Way SPI(BCM7,8,9,10,11)
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a??Package Included:
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a??1* AD/DA Extension Board