GND - GND (pin 14 on the ATtiny1641). A4 - SDA (pin 8 on the ATtiny1641). A5 - SCL (pin 9 on the ATtiny1641). You can go ahead and try this with the example Arduino interface script provided. Regular ...

Assume that you need to log some of your readings from the input pins of your Arduino Uno (or MEGA, etc.) dev board which needs to work standalone. The proper way is to store the log in an SD card ...

Unlike the other microcontroller stuffed in an SD card platform — the Electric Imp, [kodera] is, for the most part, respecting the standard pinout for SD cards.