The Schematic Diagram.
In the schematic diagram i have placed a relay, you can either connect whatever you wish.
IF YOU WILL USE AN ELECTRIC STRIKE AS I DID IN MY VIDEO BEWARE SOME ELECTRIC STRIKES CREATE VERY STRONG (E.M.P) AND CAUSES THE PIC TO RESET WHEN THE ELECTRIC STRIKE DISARMS.
*E.M.P: Electro Magnetic Pulse
* Placing an inductor wrapped on ferrite is very effective solution to the particular problem.
Bill Of Materials
|R1-R4||Resistor 330 Ohm 1/4 Watt 5% Carbon Film|| |
|R5||Resistor 10 KOhm 1/4 Watt 5% Carbon Film|| |
|R6||Resistor 2.2 KOhm 1/4 Watt 5% Carbon Film|| |
|C1||Electrolytic Capacitor 10 uF 35 Volts|
|C2||Electrolytic Capacitor 100 uF 25 Volts|
|D1||1N4007 General Purpose Diode Rectifier|| |
|Q1||BD679 (NPN Silicon Darlington Transistor)|
|Intergrated Circuits (Ic's)|
|IC1||PIC 16LF1939 Microcontroller|| |
|IC2||MCP1702 (250 mA Low Quiescent Current LDO Regulator)|
Capturing the pulses.....
That was a little bit tricky!!!.Since there was the first time interfacing with these readers cards and protocols Kam brought me his oscilloscope in order to see what's the readers output when reads a card.
We took a pattern similar to this.....
And i say similar to this because i cannot remember if the bits were same as the drawing bits i drew.
The 37 bits were received in 80msec.
Bit from bit has 2msec delay
And each bit has a duration of 40μsec
Continue reading. Click here to view the presentation.
|At 26 May 2013, 20:07:12 user atakan wrote: [reply @ atakan]|
@Panagiotis Kalogeris hello, thank you. To walk out of here if I'd share. Maybe those will help a step further.
At 22 May 2013, 12:18:38 user Panagiotis Kalogeris wrote: [reply @ Panagiotis Kalogeris]
Yes of course but the only limitation is that the reader should support "Wiegand protocol" since the pic's firmware was built to support wiegand protocol.
HID has another one type of reader where it's called clock and data interface but i haven't looked at it to tell you how it works....
look to the link below second line....
*Available with Wiegand or Clock-and-Data interface.
At 21 May 2013, 21:02:20 user Atakan wrote: [reply @ Atakan]
I saw. I apologize for that. References used in the sense of our language tool. That's why I did not notice. I apologize again for that.
I want to ask one more thing. Is it possible to use as an alternative to other rfid module?
At 21 May 2013, 8:13:15 user Panagiotis Kalogeris wrote: [reply @ Panagiotis Kalogeris]
DID YOU VISIT THE REFERENCE SECTION ????????
(Most readers at least two brands i know have same cable color code)
You will need 4 wires
- = BLACK
data0 = GREEN
data1 = WHITE
the reader has the pinout behind of it.The other cables are used to control the front indicator led, the buzzer, the hold function etc
READ THE "WORKLOG" AND THE "REFERENCE" SECTIONS!!!!!
At 19 May 2013, 21:06:31 user Atakan wrote: [reply @ Atakan]
Thank you for your response. reader found on ebay. Can you give information about which color to connect the cables, which end?
At 18 May 2013, 23:38:00 user Panagiotis Kalogeris wrote: [reply @ Panagiotis Kalogeris]
Hello Atakan did you checked the reference section? (Its Below main label 3rd tab...You will find Some important info there...)
I don't know what circuit has the reader on it....Perhaps you should contact HID for further assistance on the particular reader.....
At 16 May 2013, 22:43:42 user Atakan wrote: [reply @ Atakan]
Hello, I am a student. Required to be done in this thesis project. However, I do not know enough. I want to use your project. Can you give me information about the used RFID reader? If possible, could you give extensive information by e-mail?
Thank you. Respect for labor.
At 29 December 2012, 14:22:55 user Panagiotis Kalogeris wrote: [reply @ Panagiotis Kalogeris]
Hello Egzon!.Well right now the firmware that i have uploaded to the site has the ability to erase the whole eeprom (and the 5 positions).But i am working on a new firmware where you will select the card that you want to erase...and some new features including the bug that i didn't thought where hectrap told me... :-)
At 28 December 2012, 7:56:41 user Egzon Mulaj wrote: [reply @ Egzon Mulaj]
can we erase a sector of eeprom and write to another sector of eeprom ?
At 8 June 2012, 20:48:14 user Panagiotis Kalogeris wrote: [reply @ Panagiotis Kalogeris]
No you will have to re-erase the eeprom and then store again the cards you want.Nice observation though...i will make the correction to the new firmware :-)
At 8 June 2012, 20:38:19 user Giorgos Lazaridis wrote: [reply @ Giorgos Lazaridis]
@herctrap you little devil :D :D :D
At 8 June 2012, 20:20:02 user herctrap wrote: [reply @ herctrap]
If i erase the eeprom
and then add 5 times the card "1"
then i will be able to enter a new card?
HOT in heaven!