SparkFun microSD Sniffer Category_Microcontrollers/PICAXE qualMeter directly tells you the

qualMeter directly tells you the testing results by LEDs

This allows low-cost millimeter readings up to two meters

no other command may be issued in the middle of the sequence

commonly used for Ethernet wiring) contains four differential pairs

SparkFun microSD Sniffer Category_Microcontrollers/PICAXE qualMeter directly tells you theThis is a unique board recommended by a SparkFun customer. When playing with microSD, you sometimes need to view what the SPI traffic is doing, whether for hacking or debugging. The SparkFun microSD Sniffer allows you to hook up an external device, such as a logic analyzer or microcontroller, to view what signals are being passed back and forth. Insert one side into a regular uSD socket and a uSD card into the on board socket, simple as that. All