The reason is that SD cards operate around 3v3, but Arduino Uno GPIO pins are excited to 5v. However, these modules are still relevant because some other dev boards operate their GPIO pins with 3v3, ...

Regular SD-Card Baord with Attiny If you don't have the custom board, you can still connect a regular SPI SD card module to an ATTiny for the same purpose. Connect the SPI SD Card module to the Attiny ...

A few days ago, one of [Severin]’s SD cards died on him, Instead of trashing the card, he decided to investigate what was actually wrong with the card and ended up recovering most of the data… ...

He was inspired by Intel’s Edison compute module and he tried to go one better. The result is the SDuino, an ATMega328P processor-based development module, which fits on a standard SD card. It even ...