Arduino SD card shield that includes an external 5v-3v3 level shifter. ... The reason is that SD cards operate around 3v3, but Arduino Uno GPIO pins are excited to 5v. However, these modules are still ...

LM35 & Memory Card. This is a little DIY project with an Arduino Uno, SD card breakout board, and LM35 temperature sensor. To build a temperature logger using a microSD card, just connect the LM35 ...

The setup allows periodic readings from a DHT11 temperature and humidity sensor using an Arduino Uno development board and an Ethernet shield. Sensor readings (temperature and humidity) as well as ...

The shield can be configured to send GPS and sensor data from devices attached to an I2C bus to remote servers, or a really cool COSM server. [Phang] is selling his TraLog for $150, a fairly good ...