Many times people have asked me if its possible to make an RFID reader, I said yes but its complicated and recommend go for an RFID module instead. The complication includes not only the hardware but also the software part. The project utilizes a PIC16F628A with an on-chip comparator in order to feed the output from the op-amp directly into the PIC and extract the digital signal from an RFID card reader.


RFID Reader using PIC Microcontroller


The use of PIC16F628A is for more efficient signal reading by using interrupt based compare capture module since it is provides 150kHz carrier signal generation. Changing the values of capacitance causes the frequency of the entire system to be fine tuned. This is made possible using the function generator to sweep for the peak output observed with the scope where the capacitor size is altered until the peak response of the resonance circuit is at 150kHz.

The op-amp used in the project is TL062 with a simple diode detector. The detected voltage goes through the first op-amp configured as an inverting amplifier with low pass frequency response which will remove bulk of the carrier frequency. Extracting the FSK signal is the next stage of analog circuit which is a resonant band pass circuit with a center frequency.

The capture hardware shares resources with the PWM module that generates the 150kHz carrier signal, and only one function activates at a time.

For complete information on this project Read More here
printer friendly create pdf of this news item

Comments

kirangowle
26 Mar 2017: 08:07 AM
Hi Ajay,

I think above download links are not working. Can you please check.

Thanks
Kiran
  

Submit comment

(Required; Min length 5)
(Required; will not be displayed)

Conversation

Sun Apr 30 2017, 05:49 AM
Lijin G Varghese
Can u send me the circuit diagram for Program to interface GSM Module with 8051 microcontroller (AT89C51) using PC and LCD
Sun Apr 30 2017, 05:48 AM
Lijin G Varghese
Program to interface GSM Module with 8051 microcontroller (AT89C51) using PC and LCD
Fri Apr 28 2017, 03:47 PM
SANDEEP T S
I need pcb wizard 3.5 version kindly send valid link of yours
Fri Apr 28 2017, 03:46 PM
SANDEEP T S
I need pcb wizard 3.5 version
ExperimenterUK
Mon Apr 17 2017, 11:56 PM
Sorry..We had a problem with registration.Confirmation emails were not sent.Please re-register
Thu Apr 13 2017, 07:29 PM
Piyush Aughad
I want circuit & program for radar detection using Microcontroller 8051
Tue Apr 11 2017, 03:27 AM
Shabbir Ahmed
Hi Ajay ....hope you and your family all will be fine are you working on andriod aplications if yes then plz reply me
Sun Apr 09 2017, 06:33 PM
ATHULYA NAIR
Dear Sir, I need to know what are the complexity for programming in 8051 Microcontroller for three phase inverter?
Sun Apr 09 2017, 06:32 PM
ATHULYA NAIR
Dear Sir,
Sun Apr 09 2017, 04:43 AM
Rohit chandra joshi
Sir I need ur help urgently.i am trying to make pc controlled led scrolling display using 8051.when i am trying to generate hex file of the code that is given by pratik suthar.it gives the error Target not created Limit:0800h I am using keil uvision4 software. Even i have tried to burn the given hex file that is atteched with the code but my led are not glowing. Pls help me sir .i struck in this problem from last month and till now i am not able to short out the problem. Pls suggest me to solve the problem.mail me at [email protected] Thanks

Downloads

Comments

anshulece
Fri Apr 28 2017, 03:43 PM
Masoooud
Tue Apr 25 2017, 06:57 PM
BOuissal
Mon Apr 24 2017, 02:46 PM
tranhunga
Mon Apr 24 2017, 01:11 AM
Suslik
Sun Apr 23 2017, 09:26 AM
soumk
Sun Apr 23 2017, 06:22 AM
Vavachi1996
Tue Apr 18 2017, 08:01 PM
yasmine
Tue Apr 18 2017, 03:10 PM

Online

Guests: 53, Members: 0 ...

most ever online: 182184
(Members: , Guests: 182184) on 06 Aug 2010: 05:37 AM

Members: 37814
Newest member: anshulece
Forum Activity
ExperimenterUK Avatar
Posted By ExperimenterUK
Mon May 01 2017, 12:42 AM
Sorry, that doesn't sound "normal".I think a re-in...
Deepakvaishu Avatar
Posted By Deepakvaishu
Fri Apr 28 2017, 11:18 AM
Yes proteus is loaded ,with all projects.....Once ...
ExperimenterUK Avatar
Posted By ExperimenterUK
Fri Apr 28 2017, 05:06 AM
Does Proteus load at all ?Does it only crash on c...
Deepakvaishu Avatar
Posted By Deepakvaishu
Wed Apr 26 2017, 06:59 AM
hello...I am getting an error when I am trying to ...
ExperimenterUK Avatar
Posted By ExperimenterUK
Tue Apr 18 2017, 10:52 PM
Thanks for the comment.Glad you got it working.
Deepakvaishu Avatar
Posted By Deepakvaishu
Tue Apr 18 2017, 06:19 AM
Thank you very much...Today I got the output for a...
ExperimenterUK Avatar
Posted By ExperimenterUK
Thu Apr 06 2017, 05:38 PM
Is it initially assigned as '0', and then when the...
Deepakvaishu Avatar
Posted By Deepakvaishu
Thu Apr 06 2017, 07:55 AM
hello,Thanks for the attachment.I have gone throug...
ExperimenterUK Avatar
Posted By ExperimenterUK
Sat Mar 25 2017, 09:49 PM
I have attached code showing one method you could ...
Deepakvaishu Avatar
Posted By Deepakvaishu
Sat Mar 25 2017, 07:59 AM
I am using Keil and 8051 microcontroller