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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The Mod input selects between Read and Write operations. The black line must match the line on the PCB Kathode.


To make the code more secure you could add a delay so rdid a valid tag emm4095 be received twice, so after the valid TAG, wait 1 second, and then start a new measurement and check if the TAG is valid again. It would be easier to open the door with a crowbar.

The data sheets you can download from: The PIC16FA may not offer system clock frequency high enough to sufficiently service the interrupt routine.

The red wire is the plus. As usually we start with the components that have the lowest height.

PNP transistor not working 2. Part and Inventory Search. Still figuring out how to ‘load’ the antenna. Just finish soldering and when ready, use some copper braid to remove the solder between the 2 feet.


And measure the gain of the antenna. The time now is If not, check the input voltage, and for a possible shortcut. Distorted Sine output from Transformer 8. Choosing IC with EN signal 2. I am doing a project on Asset tracking system using active rfid. Now the program will start and show some info on the LCD. There are 3 switches that can be used for menu input, and there is a relay that can be used to activate a door opener.

Further to that the digital processor can then take appropriate actions based on the data stored on the Transponder. The oscillator frequency must be KHz. Since the chip has a boot loader, you can serial program the device. Make sure there are no e,4095 drops on the PCB. How reliable is it? After that, I just test out the antenna with a simple range test. Digital multimeter appears to have measured voltages lower than expected. When you open your door with this device, make sure you have a backup option like a key in case there is no rfic.

Losses in inductor of a boost converter 9.

This will result in a higher distance that you can use for the tags. Choosing IC with EN signal 2. Otherwise it will be ignored. While it does not seem logical to add solder, it will conduct the heat better. This will in turn suck the other solder into the braid. Parallel on dm4095 relay there is a LED for a visible indication.


The PCB is now ready for use.

Catalog | EM Microelectronic

ModelSim – How to force a struct type written in Gfid I was wondering if you can give me some guidelines for calculating the copper thickness, track width and width constraint and also number of loops and antenna dimensions. To complete your RFID reader design your digital processor will need to be a suitably fast microprocessor or other computing device in order to translate the encoded data that streams from the EM device, and to format the data in a more useful form.

Make sure the chip is lined out right and that pin 1 matches the small dot on the chip which is an indication for pin 1.

As it was suggested em4059 the EM simulation soft can do that. Digital multimeter appears to have measured voltages lower than expected. What is the function of TR1 in this circuit 3. ModelSim – How to force a struct type written in SystemVerilog?

M3x6 bolt and nut.