Arduino SD card shield that includes an external 5v-3v3 level shifter. The problem. Assume that you need to log some of your readings from the input pins of your Arduino Uno (or MEGA, etc.) dev board ...

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18 thoughts on “ Stacking GPS, GSM, And An SD Card Into An Arduino Shield ” icehoot says: October 19, 2012 at 7:11 am He didn’t sell his clients Arduinos + shields I hope. The ...