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Description: This 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 necessary pins are broken out to an 8-pin 0.1" pitch header.

Documents:

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Customer Comments

  • would it be legal to reverse engineer the SD bus (the high speed mode, not the sluggish SPI mode) and publish the specifications?

  • Reverse engineering is usually legal. In other words go for it.

  • This thing is cool, but what I’d REALLY like is some kind of adapter that lets me swing the SD card between my PC and a Beagleboard. Kinda like a KVM switch.

    So I can switch SD cards without touching anything. Like, for automated testing.

  • Wonder also if trick phone thinking a Nordic rf is storage and send a text to it to send?

  • Wondering if it would be a experiment to network two smart phones or three …., ? Or ISP from phone/tablet to arduino spi?

  • Can I use these with arduino fio?

  • This is almost exactly what i’m looking for, you see, i’m wanting to make a micro sd card to usb adapter, i was thinking the other day that they make usb sticks that you can put a sd card in, so why not go the opposite way and use high capacity usb drives on a phone. Temporarily of course, you don’t want to stick the phone in your pocket with it plugged in, it would break, but for stuff like music, pictures, movies all stored on a usb stick, plug in the adapter and use usb drives for your phone. Now to just figure out how to reverse engineer it.

  • Hi, This looks like a good board. I’m trying to make a modified version of it. Do you know where can one print a PCB of this thickness? (0.75mm).

    I am looking for something not very costly that could do a 2-layer 2x1 board of the required 0.75mm thickness.

    Thanks.

    • Hi! I hope that you can produce something. Unfortunately boards of this thickness aren’t very common. The chance of being able to find small batch services for this thin board may be harder than normal, or they may have a larger minimum order. You might communicate with OSH Park to see if they can run something. If you find something, please reply back here so that we can all know how it worked out!

  • Should have used a gold finish for boards like this with bare contacts - silver tarnishes too easily.

  • This worked GREAT not just for sniffing but also acting without an SD card as a SD card emulator/man-in-the-middle for nikon hacking and just as a pure SD card reader i can reach for when breadbording!

    also YES it works with a microSD to full SD converter

  • What is the green circuit board thing? Thanks.

  • would this show the communication involved in SD DRM operations? e.g. on symbian and windows phones, how they can encrypt the device so it can’t be read on a PC. I’ve got an SD card from my windows phone that’s currently bricked because no device other than WP7/symbian is capable of reformatting it, and i really don’t want to have to buy a symbian phone just to get my SD card working again =(

    • Have you tried using a program like MiniTool Partition Wizard? It’s free and I’ve used it to reformat cards my PC couldn’t reformat correctly.

    • A little late but for future knowledge, this would show any and all communication going to and from the microSD card.

  • Would there be any issue using this as a makeshift microSD breakout?

  • Is there a microSd to SD adapter, I have to use EyeFi which is in SD form on a device that has only microsd.

    • I’ve been looking to do the same thing - a microSD male to SD female adapter. The only solution I’ve been able to find is to buy this and the Sparkfun SD breakout board and run the wires/headers from the appropriate pins.

      This is actually a better solution to me (except for the cost) because I keep this particular project in a shielded box, and the EyeFi has trouble transmitting through it. Using wires between the two boards allows me to rout the wifi adapter wherever.

      If you already have an SD port, this is probably the cheapest retail WiFi setup for an Arduino (except for adding an Xbee to a Fio or something similar). It’s pretty easy to use too, since the SD library is pretty well made. Even better, I get my Wifi over i2c since my Sd port is on my SmartGPU ( http://vizictechnologies.com/#/smart-gpu/4554296549 ).

    • do you mean SD to microSD?

  • Can you please clarify the following topic:
    I put the microSD sniffer (from sparkfun) into the microSD
    breakout board (also from sparkfun).
    It looks like pin “CS” from microsd breakout board
    goes to (measurement) pin “CD” on microSD sniffer
    and obviously futher to pin “CS” of microsd card
    put into microsd sniffer (otherwise i think it would not work).
    Could it be that white text “CD” on microSD sniffer should
    be white text “CS” ?
    Perhaps also schematic is wrong:
    (http://www.sparkfun.com/datasheets/Tools/microsniffer-v14.pdf)
    “CD/DAT3” shall be “CS/DAT3” ?
    I am no SD/uSD card expert, please clarify.

  • Any chance to get the eagle file for this board? I’ve been looking for the physical layout of a microSD.

  • A lot of the SD stuff is already published.
    However this might be easier to use to ISP program the OpenLog (or other boards with SD interfaces connected to the SPI)

Customer Reviews

4 out of 5

Based on 3 ratings:

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Very practical, the right size for use and good looking


Great product

Good quality, works as described


Board thickness doesn't match SD card thickness

You must shim liberally to make it work.