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  • Users: Atarek
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  1. Atarek

    HSDL-9100 driving circuit

    Hello everyone, I am using HSDL-9100 sensor (see datasheet here : https://www.broadcom.com/products/optical-sensors/proximity-sensors/hsdl-9100-021#documentation), to develop an object detection system to save battery power during idle time in an electronic security product i am working on, in...
  2. Atarek

    plastic element in keypad membrance prototyping

    Hi everyone, I have developing a keypad for a project i am working on using tactile switch matrix, However there is a plastic element that should be present between the switch and the button that looks like the one in the image below, Can someone please tell how to make this element in...
  3. Atarek

    IC not found

    Hi everyone, I cannot find a reference for eeprom chip ATMLH524 nor ATMLH544 on the web, Can anyone help me with this issue, Thanks in advance, ATarek
  4. Atarek

    RFID reader with 2 antennas

    Hi everyone, I need to make an RFID solution with 2 antennas, Is there a reader in the market that can do this job, Thanks in advance, ATarek
  5. Atarek

    RFID tag sniffing

    Hi everyone, I have a problem and i need help, I am building an access control system, using RFID 13.56Mhz, but in order to save the battery's life, i have to implement a wake up system that senses that presence of the RFID tag, then it signals the MCU to wake up and take the necessary...
  6. Atarek

    R&S VNA port definition

    Hi everyone one, Can anyone help define what is Port1 and Port2 names in the below picture?, because i need to select a connector that connect Port1 to an SMA female connector that is located on my PCB Thanks advance, Atarek
  7. Atarek

    VNA measurement

    Hi everyone, I need your help in something, I am designing an RFID system using NXP chip MFRC522, in order to get the antenna series equivalent circuit, I have to make some measurement using a vector network analyzer. the VNA i have access to now is R&S 10Mhz to 67Ghz, the operating frequency...
  8. Atarek

    EMC Design

    Hi all, I am design EMC filter part of the MFRC522 Antenna Circuit, in the AN1445 application note, i find the the below recommendation, Can someone please explain what does it mean L0 = 390nH - 1uH I am sorry if this is a dumm question Thanks in advance, ATarek
  9. Atarek

    VNA RFID design problem

    Hello everyone, I recently start developing an RFID circuit MFRC522 IC, following the NXP application note AN 1445, When i try to get the series equivalent of the antenna coil using the VNA, i get a very noisy reading when i try to read the real part of the impedance S11, it varies from 6 to 10...
  10. Atarek

    detect the precense of the body inside enclosure

    Hello everyone, I have a problem and i need help, I am designing an access control, Generally the system go to sleep mode in order to save the battery life, The problem is that i want the system to detect the presence of the Mifare RFID tag in order to go to wake up mode, knowing that the...
  11. Atarek

    RFID circuit problem

    Hi everyone, I have a problem and i hope that someone can help with it, I have designed a circuit that contains the following; - controller - custom RFID reader circuit based on MFRC522 including matching circuit and EMC filters - indication (leds and LCD) - logic level converter - the circuit...
  12. Atarek

    Drilling Protection

    Hi everyone, I have a design challenge here, and i hope someone can help me, I need to develop a mechanical solution that provide drilling protection of an enclosure, knowing that i have a constraints in the thickness of the material, to be 2mm max. I suggested to increase the hardness of a...
  13. Atarek

    Antenna and interference

    Hi everyone, I have a problem and i hope someone can help me, I am designing a system comprising the following (RFID system(13.56Mhz) - TFT LCD (alike to the one in smartwatch)) The antenna used in the RFID system is inductive loop antenna, if i put the antenna as in the assembly shown in the...
  14. Atarek

    Antenna software

    Hi all, I have a problem and i hope someone can help me, I am designing an RFID system, using MFRC522 IC see datasheet here, https://www.nxp.com/documents/data_sheet/MFRC522.pdf I'm supposed to design 13.56Mhz antenna (printed antenna on PCb), 1- What is a Good software to simulate and...

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