PCF8575 Remote 16 Bits I2C IIC SMBus I/O Expander Module with Interrupt Output For arduino R3 Control Relay/buzzer/LED
Descriptions:
Are the I / O pins exhausted? This great module allows the user to expand up to 16 i / o using only two i / o for control. The PCF8575 is controlled via an I2C interface and features 16-bit near-bi-directional input / output pins.
On board 3.3V level converter circuit, if you don't solder pad of VCC-VDD, the PCF8575 level is 3.3V. If you solder it, the level will be the same with VCC
Characteristics:
Your available library: PCF8575
Operating voltage: 2.5-5.5VDC
Operating current: 100mA (max)
I2C address: 0x20 (default), can be modified by soldering A1 and selection pads A2.
16 individually addressable pins.
Each pin configurable for input or output
Open drain interrupt output pin for input change interruption.
Ideal for R3 and other MCUs to control simple relay, buzzer, button, led.