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Recent content by mpfisher

  1. M

    I do not know what type of connector it is.

    It's a press-fit PCB stacking connector similar to this one: https://www.ept.de/index.php?flexilink-PCB-connections-board-to-board Hope this helps
  2. M

    Altium ActiveBOM price issue

    It must be Altium Designer scripting issue. You should be able to raise a ticket with Altium support for this. I used this feature a lot few years back (AD 2013) without any issues.
  3. M

    [No title]

    Re: Laser Soldering: minimum hole applicable and depth? :arrow: Could you give us more details about the particular connector you intend to use? In my opinion, soldering of press-fit connectors defeats their purpose. They are meant for solder-less application and provide much more reliable...
  4. M

    How to view automotive relay voltage transients

    Set your scope's trigger level above 12V and trigger mode to single-shot. It should detect voltage spike and trigger when you disconnect the power to the relay. If its not detecting, the scope may be too slow.
  5. M

    micro usb connection

    Klaus is right. Different manufacturers have different recommendations for USB connections. I have designed many boards with FTDI chips and have always used a combination of res/cap on data lines. This on some ocasions helps to pass EMC/EMI certification.
  6. M

    micro usb connection

    This connection is ok for DIY project where you don't have to worry about EMI. Nothing wrong with that.
  7. M

    Question regarding ATEX compatible design (IEC60079-11)

    IEC60079-11 mentions "blocking capacitors" which are used to block DC component of a signal usually on input or output of the device. It also mentions "filter capacitors" and according to the description there these caps are placed between the enclosure (frame) of the device and intrinsically...
  8. M

    Usb port component fried

    300 ohms is an impedance of a ferrite bead usually specified at 100MHz. Its DC resistance will be much lower, somewhere around 0.3Ohm. Hope this helps
  9. M

    Usb port component fried

    Both of these components are just ferrite beads. As you can see they are located on the power traces. Usually, these are 300 to 600 Ohms with 1A current rating.
  10. M

    Via Fence and Guard Ring

    Looks good to me. You could move ADUM5010 to the right - away from the edge of the PCB since this is the most "noise-producing" component. Great job!
  11. M

    For hire - Hardware engineer based in the UK

    Over 25 years of experience in electronic product design for a variety of sectors. I can capture your concept into a schematic, design a PCB, manufacture and test the prototype. Please send me a private message for more details. What I can do: * Concept capture * Schematic capture * PCB design...

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