- Brand Name: Exciting
SD Card Reader Module Slot Socket For Arduino ARM MCU
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- Compatible with 5V, 3.3V
- Arduino, STM32, MSP430 or 8051 micro-controller connected SD card reader
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Top Customer Reviews
A breakout with a level shifter chip like the TI HC4050M makes for a better and more stable choice but you will pay 2 to 3 times this price for the stability it provides.
3.3v and 5v connected to my Arduino Uno R3 along with both grounds.
CS to PIN 10
MOSI to PIN 11
SCK to PIN 13
MISO to PIN 12
The example sketch with Arduino IDE (CardInfo) was able to see the card. I needed to change cardsense to PIN 10 in the sketch. Also, only the pins closest to the card worked. The outer pins on the board did nothing.
While a lot of comments are about level shifting (check out Dennis Spanogle's comments!) I'm pretty sure that the electrical noise is the problem. Keep you line lengths shore and use (make) twisted pairs (braided trios).
It is fragile. OK, I'm abusive to my projects because I try to make things that will last. I've had mine exactly two days and I broke one of the leads to the SD holder. (How did I figure that out? There are four resistors, three capacitors and a very robust voltage regulator ... these are not easily fried. it was a broken trace or lead.) Tiny little buggers and when I tried to fix it I broke a half dozen more. Not only are the leads fragile, but the pc board itself is fragile. When I removed the header, I buggered the connection to the SCK line. (The plating of the plated through hole came out with the pin.)
Yet I was still able to fix it. I soldered wire-wrap wires to the contacts of a micro-SD to SD adapter, then soldered these to the appropriate places on the board. (Care must be take to not melt the adapter. Also note that contact 4 of the adapter is soldered to pads 4 and 5 of the board)
So I love the cheap price: There is no way I could have bought all the individual parts that cheap. It included is a board to which everything is mounted. Bottom line, if you can't do what I did, spend the the money to buy one from a company that would send you a replacement if it didn't work first time out of the box.
(How many stars should I give it? My rating is what it is because I would like you to know into what you are getting.)
This card reader has a 3.3v regulator on chip. Supply 5 Volts to the 5 Volt pin and 3.3 volts is supplied to the SD Card and to the 3.3volt pin. You do not need to supply 3.3 volts.
All lines except CS have a 10k pull up resistor connected to the 3.3v on-chip regulator. To use with 5 Volt Arduino::
Connect 5 volts to the 5 volt line.
Connect a diode to each signal line except CS. The cathode should be connected to Arduino digital line. This lets the Arduino digital output pull down the card's line but prevents the Arduino from forcing 5 volts to the card's signal line. The on-board pull up resistor will pull the card's line high to 3.3 volts. ( Arduino pin ----|<--- Card reader pin )
For the CS line: connect a pull up resistor from the CS line to the 3.3 volt pin on the cards pin (connected to the onboard 3.3V regulator. 10K should work. Then connect a diode from the CS line to the Arduino digital pin as above.
This is easier than using a level converter.
Most Recent Customer Reviews
The reader (at least I think it's the reader) is very finicky about which SD cards it will read. I tried 5, and only could get 2 to work. Read morePublished 13 days ago by ROBB H JONES
Arrived on time and in good shape. Easy to use even for a beginner had it running in very short period of time on a Mega 2560
MISO pin 51
SCK pin 52
MOSI pin... Read more
Buyer beware. These cards do not have level shifters for the MISO, MOSI signals. The level shifters must be added to the interface connection between these cards and Arduino. Read morePublished 1 month ago by pinworks
This works and is easy to use. It works with standard arduino SD libraries. I haven't had any read/write errors or anything.Published 1 month ago by Jason N.
works great, LOTS of guides on how to install and they do what I need them to doPublished 4 months ago by fistus rectumus
5 to 3 V shifter or this will be sporadic. Don't bother if you don't want to mess with level shifting as others have mentioned. Read morePublished 5 months ago by Dan