Today I have been testing a module for Arduino that I had bought on Ebay and I also tried the Micro SD reader located in Arduino’s Ethernet Shield. To do this I made a simple code that writes every 5s the value of a potentiometer connected to the Arduino board in a file called “VALORPOT.TXT” (If this file doesn’t exist It is created and if It already exist the data is added after the existing one).
Hello. Recently I’ve bought at Dealextreme the Tiny RTC I2C module for Arduino. Once it’s configured and launched, it allows us to know the current time and day. This module consists of a DS1307 clock , an EEPROM 24C32AN memory and a holder for CR2032 lithium battery.