Open Source Hitag Programmer

**XProfig** · 23rd May, 2022, 05:07 PM

Please have a look at rellullapaasee's website, the link to it was posted in one of the first messages of this thread. There you should find all the details regarding the wiring. If you have still questions after reading that info, you can come back and ask it here.

**Raffy haddad** · 24th May, 2022, 07:05 PM

Thanks for your reply
For sure will check
Just need clear picture for rfid iprog mod for the 2x22 cap location to solder
regards

**XProfig** · 26th May, 2022, 11:03 AM

This is what rellullappasee wrote on his site:

So we need to add 4MHz one between PCF7991 pins 6 and 7. Also add 22pF caps between pins and GND

So just solder the 2 x 22pF to a position near the 4MHz oscillator where it fits best. One 22pF between the trace connected to pin 6 and GND, and the other one between the trace connected to pin 7 and GND. Unless there is nobody who sends you a detailed photo of his modified PCB, you need to be creative and find a good position yourself. I personally do not use that IPROG board, so I can't provide it.

**adikad** · 26th May, 2022, 06:33 PM

hello,

have waited for the time to take a look at this project for a while now,

Having some issues geting the hardware to work
i am not sure where to start trying to solve this problem?
any ideas?

a.jpg b.jpg

**XProfig** · 26th May, 2022, 08:09 PM

Did you check with oscilloscope that the quartz oscillator is really oscillating?

You might also try the modification proposed by mikelelere in #218

This is a small mod of rellullapaasee's Arduino sketch that resorts to TIMER2 CTC mode to output a 4 MHz clock on pin 9 of Arduino Mega. By feeding this clock into the PCF7991 XTAL1 input (available at the 37-pin connector via a series 1K resistor), it is no longer necessary to perform any hardware modification to the iProg adapter. I've tested it by reading two Hitag2 fobs and seems to be working very well. Thanks rellullapaasee for this great tool.

If you use arduino nano, you need to use the sketch i uploaded some pages later.

**XProfig** · 26th May, 2022, 08:48 PM

Double post

**adikad** · 26th May, 2022, 09:55 PM

Did not have oscilloscope at home, will check that.
Did also try the modification you provided, without any luck.

Checked the wiring several times, i fell like i am missing something basic. bin beating on this for a few hours now,
i think i might pull apart a zedfull mini and give that a go.

Originally Posted by XProfig

Did you check with oscilloscope that the quartz oscillator is really oscillating?

You might also try the modification proposed by mikelelere in #218

If you use arduino nano, you need to use the sketch i uploaded some pages later.

**Raffy haddad** · 31st May, 2022, 09:32 AM

@ adikad as your pict shows , mostly need to remove jumper from 134 to 125

@ xprofile can you tell what page is your sketch for arduino nano ?

**XProfig** · 31st May, 2022, 11:11 PM

Originally Posted by Raffy haddad

@ xprofile can you tell what page is your sketch for arduino nano ?

Can you search for my post where I attached the sketch? It is some pages after Post #218. Maybe it's Post #233 or sth. like that.

**Raffy haddad** · 2nd June, 2022, 10:55 AM

Maybe from gui and peeps here can be made as script also for iprog
just an idea
not want to be push demanding
regards

Thanks to xprofig to shade light
what I mean that : most members have iprog device with rfid
and in iprog there is scripts , or plugins about transponder programmer as 4d , t5 ,hitag2 .......
it will be great if author can translate or write scripts ready to use with iprog device and adapter as someone here asked if it can be write to use with mini zedbull and effi , I am not familiar with the iprog scripts language
If it can be done it will be great and if not also great due to alternative solution
and thanks to author and peeps like xrofig and all who contribute to this project
best regards

**GlennGlenn** · 5th June, 2022, 03:42 AM

This post is regarding the iProg Pro adaptor UNIRFID V1.2

ADIKAD

Your UNIFRID adaptor has some critical capactors missing that are needed for the PCF7991 to operate.
C2, C3 & C4 must be fitted, all are ceramic 100nF.
C5 & C10 must be fitted, they are in parallel and together form the resonance capacitor required for 125KHz carrier.
The printed circuit coil measures ~74uH therefore the cacacitance should be ~22nF.
Be sure to use a +/-2% low ESR capacitor to maintain Z & Q.

Other points:
Removing R1 correctly isolates any fitted crystal from off board interference.
But, if you use a 4MHz clock from the arduino, the missing R1 must be shorted to route the signal to the PCF7991.

Jumper J1 in your pic is set to run the coil at 134KHz. Remove the jumper for 125KHz (default). The 125 position is just across 2 ground pins.
The relay should only click (energise) when 134 is set on the jumper.

If anyone has a UNIRFID adaptor with factory fitted C5 & C10 please measure and post the value/s.

G

**gifret** · 5th June, 2022, 05:07 PM

hi friends
if someone have the complet schematic IPROG PCB reader can share it .

thanks

**GlennGlenn** · 5th June, 2022, 11:20 PM

Originally Posted by gifret

hi friends
if someone have the complet schematic IPROG PCB reader can share it .

thanks

If you mean the full iProg Pro.
https://iprog-pro.blogspot.com/2020/...chematics.html

**gifret** · 9th June, 2022, 11:27 PM

hi
i mean reader 125 khz with PCF7991AT and inductor capacitors ext...

i want to make one .

thanks

**GlennGlenn** · 10th June, 2022, 01:21 AM

Originally Posted by gifret

hi
i mean reader 125 khz with PCF7991AT and inductor capacitors ext...

i want to make one .

thanks

Hi
If you want to make a reader board from scratch I suggest you try to find the PCF7991AT first.
I can't any in stock anywhere.
If you are able to remove the PCF7991AT from an existing board then I can advise how to build one.
I have the schematic of a built and tested reader.
The easiet option is to make a shield for the Arduino Nano that has everything on board but the coil.
Best regards
Glenn

Update: Schematic