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sleeper

Member Since: February 10, 2009

Country: United States

Profile

Bio

Purdue EET Senior

Spoken Languages

English

Programming Languages

C/C++, Visual Basic

Universities

Purdue University

Expertise

Focus on embedded systems

  • “I don’t always solder, but when I do, I prefer to solder everything at the same time”

  • Most likely 5V, with a 1k resistor, 5-1.7V = 3.3V. 3.3V/1k = 3.3mA. Not much, but probably enough to keep it from poofing.

  • The LED would provide a little load for one of the outputs. I don’t know which output it is connected to though.

  • Awesome!

  • No, you would need an ID-20RW (or WR, the datasheet uses them interchangeably) to write to tags. Even then, the datasheet talks about using a different card format, the Temec Q5555.
    I don’t know whether the Temec format is compatible with the EM4001/2 or not.

  • Yes! The datasheet has some general guidelines to follow when building an external antenna. They even provide a website on the theory behind loop antennas.

  • I have been experimenting with tags that have about 1" diameter antennas. I was able to read the tags through a 1.5" solid piece of wood. In fact, it read the tag 3.5" away from the face of this reader.
    I found the tags on a different site, which I will not post, since this is Sparkfun’s site. A quick Google can lead you to a myriad of different tags. Make sure your encoding matches though.

  • great sensor. I was able to read cards through a notebook and a stack of paper.

  • scratch that, I was personally able to get it to work on 3.3V.
    9000: We could not get this LCD to update the display powered with 3.3V in lab. The display holds data at 3.3V, but we had to bring the power up to around 4.5V in order for the display to update.
    Be sure to check page 19 of the datasheet.

  • We could not get this LCD to update the display powered with 3.3V in lab. The display holds data at 3.3V, but we had to bring the power up to around 4.5V in order for the display to update.
    Be sure to check page 19 of the datasheet.

No public wish lists :(