Are the I/O pins exhausted? This large module allows the user to expand up to 16 i/o with only two i/o for control. The PCF8575 is connected via an I2C interface and features 16-bit near-bi-directional input/output pins.
Onboard 3.3V level converter circuit, if you don’t have a solder pad of VCC-VDD, the PCF8575 level is 3.3V. If you solder it, the level will be the same as with VCC
- 16 individually addressable pins.
- Each pin configurable for input or output
- Open drain interrupts output pin for input change interrupt.
- Ideal for R3 and other MCUs to simple relay, buzzer, button, led.
1 x Expander Module