The analog input and output ports are needed when doing experiment with Raspberry Pi control board. Without analog ports on Raspberry Pi board, therefore, we design this adapter board to convert digital value into analog value.
This module primarily adopts PCF8591chip, including one I2C communication interface, 4 analog input and 1 output ports. The address, control and data signals are transmitted by the serial way of dual wire and direction. Meanwhile, the 2 indicators on the module are controlled by analog output values. In addition, the location holes of module contribute to fix module on the other device.
Note: There is a pad hole at silk print PCF8591, which is the Aout port. You need to solder the pins at Aout port if linking with other circuit.
