LCD backpack (PCF8574A) & RTC (DS3231)

My minimalistic version of LCD clock:
small Arduino Pro Mini + I2C/TWI LCD backpack + LCD1602 + ultra small High Precision Real Time Clock for Raspberry Pi

also I use
FTDI Breakout Reloaded

In its final form I plan to use this housing:
LinkSprite Clear Enclosure

LCD_16x2_BackPack_v003.ino (7.23 KB)

Screwing into enclosure and two weeks of continuous operation without any problems :)

And even more source codes ...