Ардуино и расширитель портов PCF8574

If Arduino does not have enough pins, then you can easily add them! There is a special device - a port extender based on the PCF8574 chip. The expander is connected on the line I2C. PCF8574 increases the number of pins by 8. Be sure to read these articles: https://playground.arduino.cc/Main/PC... http://adatum.ru/pcf8574-kak-legko-uv... https://github.com/skywodd/pcf8574_ar... Library and sketch: https://drive.google.com/open?id=0Bw5... Friends, support the channel!   R340967932571   Z422687519909   U139735106020   4149625807630874 Privat Bank (Ukraine) Useful links: Port extender: http://ali.pub/1xmmap Port extender for 16 pins: http://ali.pub/1xmme7 Display 1602 + expander ports: http://ali.pub/1vb6ja Micro SD Module: http://ali.pub/1tkx36 Arduino Mega 2560: http://ali.pub/1ny34r Cheapest Arduino Pro Mini for crafts: http://ali.pub/1ny2z4 Breadbord: http://ali.pub/1ny3ae Lintels: http://ali.pub/1ny3la Quality crosspieces: http://ali.pub/1ny3j5 The most convenient cash back: LetyShops: https://goo.gl/Ev5XgI The most profitable cash back on aliexpress: Ecomerce: https://goo.gl/3dDc2w