Your cart is empty.
Your cart is empty. As the I/O interface resources of MCU is limited, your project may be not able to use normal LCD shield after connected with a certain quantity of sensors or SD card. However, with this I2C expansion board, you can easily implement functions that require many I / O interfaces. It is fantastic for MCU based project.
Technical Specifications:
Operating voltage: 2.5 V to 6 V with non-overvoltage tolerant I/O held to VDD with 100 uA current source
Operating temperature: -40~85 Celsius
Low Standby-Current Consumption of 10 μA Max
I2C to Parallel-Port Expander
100 kHz I2C-bus interface (Standard-mode I2C-bus)
Open-Drain Interrupt Output
Compatible with Most Microcontrollers
Latched Outputs with High-Current Drive
Capability for Directly Driving LEDs
Latch-Up Performance Exceeds 100 mA
If you need sample programs or data manuals, you can contact us by mail, we will send you as soon as possible.
Package Included:
5x PCF8574 I2C Interface 8bit IO MCU Expansion Board
clalac
Reviewed in Canada on March 10, 2025
good price and easy to use
Jennifer
Reviewed in Canada on December 24, 2024
These Devmo I2C expansion boards are really quite nice. The make it easy to add IO pins to your micro controller like an Arduino or Raspberry Pi. Devmo provides good information about these on their website with example code.
Paul M.
Reviewed in Canada on October 27, 2024
This module solved a requirement to add outboard marine engine sensor inputs for telemetry. The i2c support combined with the small ESP01m is my perfect solution for my digital dashboard project for the boat.Both modules live now in an enclosure under the cowling with the heat and moisture environment of the engine.
DJRob
Reviewed in the United States on April 20, 2024
These are useful if you've run out of DIO pins on your controller or don't want to homerun a bunch of DIO lines back to the controller. Essentially, once you figure out how to do it, you send a byte and that sets all channels at once- based on the binary representation of that byte. Unfortunately, the vendor does not include the necessary information in the product listing nor in the package to know the I2C address, addressing options with the jumpers, and what register to read/write. They do say to email them for sample code and documentation, but seriously? Just include a link or better yet, all the information that anyone would need to get started could fit on a business card tucked in the box. Minus 1 Star for the low effort.Googling PCF8574, you'll find the TI datasheet and lots of useful resources for similar boards from other vendors- including a jumper map for the addresses. There are also a few libraries on github or available through Arduino IDE that have demo code and can access pins individually.
JQ
Reviewed in the United States on April 19, 2024
These expansion board are perfect for controlling lights, motors, switch arrays, etc over just two i/o lines (i2c). They are daisy-chainable and come equipped with jumpers to set i/o addresses.Board quality is above average and each board comes sealed in ESD protective bag.
Recommended Products
CA $30.99
CA $ 13 .99 CA $13.99
CA $49.33
CA $ 21 .99 CA $21.99
CA $10.29
CA $ 4 .99 CA $4.99