The RFid Reader Board is a kHz RF transmitter and reciever, featuring the EM controller chip. The reader has three main functions. The EM is replacement IC of the UB Atmel reader chip. EM is a CMOS integrated transceiver circuit for RFID applications. EM Read only Receiver and transmit to UART 10 digit hexa code by ASCII.

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Parallel on the relay there is a LED for a visible indication. A complete KIT is available from the web shop at www. Synthesized tuning, Part 2: Measuring air gap of a magnetic core for home-wound inductors and flyback transformer 7.

RFID Reader/Transmitter Board, kHz, EM, IDC

What is the function of TR1 in this circuit 3. IC4 is a serial interface buffer so we can connect the PCB to our computer for logging and programming. Part and Inventory Search. The Mod input selects between Read and Write operations.

EM RFID front end chip

PV charger battery circuit 4. Heat sinks, Part 2: After that, I just test out the antenna with a simple range test. See UB to learn more.

And measure the gain of the antenna. AF modulator in Transmitter what is the A? With only a few external components the EM can generate the kHz resonant magnetic field required for reading and writing of magnetically coupled RFID Transponders. To rfi in your own RFID system design we also stock: It is possible that you need to remove a few windings of the antenna coil to get an exact KHz. As usually we start with the components that have the lowest height.


You can measure this with an oscilloscope. A coil, capacitors that tune the coil for KHz, are basically all that you need. Part and Inventory Search. Equating complex number interms of the other 6.

The time now is Turn on power triac – proposed circuit analysis 0. Rfd was wondering if e4095 can give me some guidelines for calculating the copper thickness, track width and width constraint and also number of loops and antenna dimensions. Now solder the remaining pins. When you open your door with rfix device, make sure you have a backup option like a key in case there is no power.

It would be easier to open the door with a crowbar. The SHD pin controls the sleep mode of the device. Now the PCB is ready.


Dec 242: I don’t know feasibility of this solution as you need many turns due to higher inductance for KHz. Turn on power triac – proposed circuit analysis 0. Measuring air gap of a magnetic core for home-wound rfkd and flyback transformer 7. Notice the gap in the middle which must match with the PCB.

  ASTM D4393 PDF

EM4095 rfid 125khz rfid reader module

Losses in inductor of a boost converter 9. Measure pin 1 and pin 2 of IC1 the voltage input and pin 3 and pin 2 of IC1 the voltage output. ModelSim – Em409 to force a struct type written in SystemVerilog? Can you point me to some literature and calculation tool for building loop PCB antenna.

Integrated PLL system to achieve self adaptive carrier frequency to antenna resonant frequency. This works best when you lay the braid over the 2 pins, then push the solder iron to the braid so it will heat up.

When you use too much solder, and two feet are soldered together do not panic. The following is an example in MikroC, wm4095 you should be able to adapt it to another C Compiler. How do you get an MCU design to market quickly? Otherwise it will be ignored.

Magnetic RFID reader antenna 1. ModelSim – How to force a struct type written in SystemVerilog?