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The NOYITO PCF8574 IO Expansion Board is a powerful 8-bit I/O expander designed for I2C-bus applications. With the ability to connect up to 8 boards, it offers a total of 64 I/O ports, making it an essential tool for developers looking to enhance their microcontroller's capabilities. Its compact design and lightweight build ensure easy integration into any project.
| Brand | NOYITO |
| Product Dimensions | 3.75 x 1.67 x 1 cm; 11 g |
| Item model number | NOPCF8574IOE |
| Manufacturer | NOYITO |
| Series | PCF8574 IO Expansion Board |
| Are Batteries Included | No |
| Item Weight | 11 g |
P**A
Works great out of the "bag!"
Using it to interface some old ICs via 8-bit parallel bus with my microcontroller. No issues. Great quality for the money.
K**N
Good
they work well, just wish there were mounting holes so they could easily be placed in a project box
M**H
Works Perfect
Used one to reduce the used number of pins on a 4x4 keypad from 8 to 2.
J**H
Read the definition carefully
The definition states these are Quasi Bi-Directional - odd term - but if you look at the PIN circuit it is clear. While they are great for OUTPUT (assuming 1ma source or 25ma sink is sufficient) - as INPUT they are sorely lacking IMHO. The Input must be able to overcome the OUTPUT 1ma sufficiently to pull the signal low. And your code MUST write a HIGH to the INPUT pin prior to attempting a read.In short - I consider these ONLY for OUTPUT usage. They work as input but IMO put a strain on the driver circuitry.This is true for all PCF8575 or PCF8574 - so be careful when you use them.
S**T
It works!
Hooked it up and it worked perfectly with a 4 X 4 keypad...
Trustpilot
1 month ago
1 week ago