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RFID card reader set up help? — Parallax Forums

RFID card reader set up help?

PaulBoylePaulBoyle Posts: 1
edited 2013-08-04 21:07 in General Discussion
Hi

Im running on a BASIC stamp 2 on a development board and trying to connect a RFID card reader (#28140). I followed the instructions.. Vcc, GND etc.
I can't seem to get any power to the module however, has anyone got any wiring guides or link me to something that can help me?
I assumed If I connect 5v and GND it should light the LED as it is in idle mode...

Anyway thanks :tongue:

Comments

  • FranklinFranklin Posts: 4,747
    edited 2013-08-04 16:07
    Have you looked at the documentation? There is a power pin that goes to +5 and a ground that goes to ground. If you don't have power make sure you are providing it to the module. Including the connections you have made, the code you are using and pictures might help.
  • NWCCTVNWCCTV Posts: 3,629
    edited 2013-08-04 19:54
    When I first tried connecting mine to a Homework board using only the 9V battery I had this same issue. I then hooked the RFID Reader to a benchtop power supply, supplied 5V and it worked after that. I also connected it to my Prop BOE and using a 12V wall wart worked with it.
  • Mike GreenMike Green Posts: 23,101
    edited 2013-08-04 21:07
    When the RFID card reader is active (/Enable is connected to ground), it draws quite a bit of current ... up to 200mA. Most development boards will handle this. The HomeWork board should if it's powered by the USB port.

    The RFID card reader's documentation describes how to hook it up. You connect +5V to a source of regulated 5V that can supply 200mA, ground of course to a common ground point, /Enable to an I/O pin that gets set low to turn on the RFID card reader, and Sout to another I/O pin that receives the 2400 Baud serial data.
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