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Recent content by HasHx

  1. HasHx

    Split power plane guidance please

    SIGNAL GROUND SIGNAL GROUND POWER POWER GROUND SIGNAL GROUND SIGNAL that should do.
  2. HasHx

    Split power plane guidance please

    If layers 3 and 6 have sensitive signals, you may want to consider making it a 10 layer board and make inserting 2 power planes between 4 and 5 making L-5 GND. this is the safest approach. If you want to keep it as a 8-layer board, then maybe making L-2 a power plane would be safer. just fill...
  3. HasHx

    PCB footprint...origin in cetnre, or pin one?

    Hi, I always use center of symbol as my origin, with uneven parts i pick the center of the pads, if the pads were uneven as well i would go with pin #1 do not worry about manufacturing and shorting etc.. the manufacturing engineers will fix anything if needed. regards, Hashem
  4. HasHx

    Footprint with vias in allegro

    Hello, I have had the same issue before and I worked it out in a weird way but it was the only way that enabled me to do so. First go to your schematic symbol and add pins with the same number of vias needed (you can make these pins invisible to avoid confusion). Then go to your footprint and...
  5. HasHx

    ZCD (Zero Crossing Detector) Module Functionality.

    Refer to the old thread I posted in the first post for info. It does not reset the processor, it creates a short circuit so power goes off and back on hence causing MCU to reset. this happens due to the feedback loop on IC6 which has -ve voltage. does this make sense to you? Edit: when we...
  6. HasHx

    [SOLVED] PIC18F25Q10 A/D module functionality

    Please follow up on this thread: https://www.edaboard.com/threads/zcd-zero-crossing-detector-module-functionality.395990/#post-1701172
  7. HasHx

    ZCD (Zero Crossing Detector) Module Functionality.

    Hello, Following the thread @ https://www.edaboard.com/threads/pic18f25q10-a-d-module-functionality.395679/#post-1699834 We are suspecting that there is an issue caused by the ZCD module, we are using: PIC18F25Q10-I/SP (Datasheet...
  8. HasHx

    [SOLVED] Eagle Layer Color

    Hi, Can you record a short video showing how this happens?
  9. HasHx

    [SOLVED] PIC18F25Q10 A/D module functionality

    Hello, Regarding schematic issues, we had this same schematic setup done to a different MCU:PIC16F876A-ISP (Schematic attached), it worked just fine! now I am just trying to upgrade the MCU and got too many problems. Some points we can do for the design to improve such as points 2,3 and 4. for...
  10. HasHx

    Location of AC coupling capacitors

    In addition to what FvM said above, I suggest placing the caps at the FPGA side, as it does not make much difference but in all cases the FPGA can be more susceptible to EMI and this should help reduce it in case of there was no signaling.
  11. HasHx

    [SOLVED] PIC18F25Q10 A/D module functionality

    Hi, here is the code we wrote for this: /** * Initialization routine */ void init(void) { #ifdef _PIC16F876A_H_ // Conversion Clock: // Fosc/2:000 // Fosc/4:100 // Fosc/8:001 // Fosc/16:101 // Fosc/32:010 // Fosc/64:110 // must be selected to ensure a minimum...
  12. HasHx

    [SOLVED] PIC18F25Q10 A/D module functionality

    Hello everyone, I am using a PIC18F25Q10-I/SP MCU in one of my designs and one of its main function is to read a changing value of 0-5v coming from an inverting Op-Amp. the input is tested before with a different MCU and is working properly but when it's connected to the bespoke MCU it...
  13. HasHx

    CM108 CODEC bidirectional

    Good day everybody, I need someone that has experience with the CM108B chip (Datasheet: https://www.qsl.net/om3cph/sb/CM108_DataSheet_v1.6.pdf ) I am designing a board that requires converting (SPK+ SPK- and MIC+ MIC- Analog audio signals from SIM800L module (Info...
  14. HasHx

    Layout Check for FLyback Power SUpply

    Hello sabu31, I am here to make few comments about the PCB, first, try to minimize the length of the HV traces and widen them up, this can be done by rotating the rectifier circuit and bringing it closer to the input. Second, you can always have the GND plane as a copper pour over the bottom...

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