an I/O
Posted: Thu Nov 18, 2021 8:17 pm
The PCF8574T IO Expansion Board is an I2C-bus remote 8-bit I/O expander. The I2C-bus can be connected to up to 8 PCF8574T IO Expansion Boards, providing up to 64 I/O ports.
The PCF8574T IO Expansion Board includes the ability to connect multiple modules to the I2C bus at the same time by connecting the pinheader and connector.
Onboard is a small potentiometer for adjusting the backlight of the LCD1602 or LCD2004, as well as a jumper cap for controlling the LED light switch.
I have learn a lot from this artitle, if you read ir, you can give me your opinion.
https://www.apogeeweb.net/circuitry/pcf ... inout.html
The PCF8574T IO Expansion Board includes the ability to connect multiple modules to the I2C bus at the same time by connecting the pinheader and connector.
Onboard is a small potentiometer for adjusting the backlight of the LCD1602 or LCD2004, as well as a jumper cap for controlling the LED light switch.
I have learn a lot from this artitle, if you read ir, you can give me your opinion.
https://www.apogeeweb.net/circuitry/pcf ... inout.html