Description：

1、Standard interface that can be expanded in a variety of development boards

2、AD / DA chip, 8-bit precision, four-channel AD, single -channel DA, voltage output

3、PCF8591 with I2C interface, adjustable resistance, AD input port, DA output port

4、Support two kind of interface type to access target board: male needles or female needles

5、Support the I2C bus cascade (through the male needles or female needles, can use several I2C module at the same time)

6、Applicable to a variety of platforms including  Arduino / AVR / ARM