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RFIDGeek/Univelop RF500B RFID Module

RFIDGeek/Univelop RF500B RFID Module

This is the RFID Module sold by RFIDGeek/Univelop Tech. While this little module might not look like much, it IS true what they say, “Good things come in small packages”.

By wiring +5 and Ground, as well as RS232 RX and TX to the board, you can use the included program to read and write to/from MiFare cards.

The company website ( does not do the module justice. This little ~1.35″*2.25″ RFID reader/writer module packs the following onboard:

Top Side:

  • Fudan Microelectronics FM1702NL (32-pin SOP): [PDF] Parallel or SPI Interface (Note, the higher models, FM1715NL and FM1725NL both share a common pinout, and offer increased features [see the PDF]. I wonder if the board would work with one of these instead of the FM1702…)
  • 13.56Mhz Crystal
  • Sipex SP232EEN: TTL-RS232 Converter

Bottom Side:

  • LSI 1021WI?: (8-pin SOP, bottom side of the module)
  • Unknown Microcontroller: (44-pin, ID has been shaved off)
  • 11.0592Mhz Crystal

There is space available to add pin headers to the board for each of the following: (All of these are subject to change and/or verification)

J1: Antenna Interface

  1. Ground
  2. Transmitting Antenna 1
  3. Ground
  4. Transmitting Antenna 2
  5. Ground
  6. Receiving Antenna

J2: Microcontroller Interface

  1. Control Output
  2. Buzzer Output (High)
  3. RS485 Control (Low)
  4. VCC
  5. Reset Onboard MCU (High)
  6. Ground
  7. UART Receive
  8. UART Transmit

J3: Microcontroller SPI? (For the “Module 500” Only?)

  5. SPI Clock Out from FM1702NL Pin 24

J4: RS232 I/O

  1. VCC (+5V)
  2. RS232 Receive
  3. RS232 Transmit
  4. Ground
Anadigi GPS-R02 DIY GPS Kit

Anadigi GPS-R02 DIY GPS Kit

I got this little “Anadigi GPS-R02 DIY” car gps kit from eBay seller anadigi-hk, and it was mailed direct from Hong Kong.

[Edit: Apparently, the eBay Store and user are no more.]

It came with the GPS Circuit board and a little plastic case for it, an MMCX antenna with magnetic base, and a matching USB cable. The mini-CD came with drivers and a few test and diagnostic programs.

It works great; by the time my computer comes out of hibernation, it already has a signal lock. Talk about bang for the buck!

The receiver is based on the NemeriX NJ1030A [Datasheet –], and includes WAAS/EGNOS support.

Markings on the box: (They look like the vitals for the GPS Antenna)

  • Product Model: GPS
  • Center Frequency: 1575.42 +/-3Mhz
  • LNA Gain (Without Cable): 28dB
  • Noise Figure: <1.5dB
  • VSWR: <2.0
  • DC Current: 10mA Max
  • Mounting: Magnetic Base
  • Housing: Black
  • Working Temp: -40*C ~ +85*C
  • Vibration: Sine sweep lg(0-p) 10~50~10Hz each axis
  • Humidity: 95%-100%RH
  • Weatherproof: 100% Weatherproof
  • Cable Length: 3m
  • Voltage: 3-5V
  • Connector: MMCX
  • USB to Serial Converter (onboard): PL-2303* (but the Prolific Windows driver doesn’t like it, errors with Code 10: Cannot start”, according to the Prolific website, that means it’s likely a counterfeit PL-2303 chip. I’ll have to dig out the CD that came with it again.)

Update: How to add GPS to your Eee PC @ – That’s definitely one of the first things I’d do with an Eee.