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  1. B

    Inrush current limiter

    Thank you very much for your comment. My PCB consists of a micro-controller and some optocoupler to enable and disable some 24V output switch (10mA). However, my main load is a motor driver which use 2A to biases itself. In my test, I disconnected my motor driver and my circuit just consumes...
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    Inrush current limiter

    Thanks for your comment and swift response. I put a power connector on my PCB. When I connect the power to it at first glance, because my Cap is empty, it produces a spark at my connector. In addition I am worried about the life time of my component such as my diode bridge and my power supply in...
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    Inrush current limiter

    Hello, I have a 24V/6A dc power supply. When I apply this power supply to my circuit ( a diode bridge and 470MF capacitor) it produces sparks. I am going to use a NTC (about 10ohm). Based on my space limitation I can't use a relay to bypass this NTC after a second. I am worried about placing...
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    EMC circuit protector

    Dear KlausST, Thank you for your comment and you useful info. I have heard that my PCB should be checked for EMI/EMC test which my board is not a high-frequency board it just has Ethernet Connection+Max485 communication.
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    EMC circuit protector

    Hello, I need to know how to protect my circuit from EMC test. My input voltage is 24V(3A) and after a pole diode( for preventing from reverse voltage) and TVS diode it goes to my regulator(MinMax dc-dc). How can I increse my protection?
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    Updating footprint in PCB window after being changed in PCB library

    Thank you for your comment, Yes I have checked but it doesn't work. I changed all of them by the mentioned way by wwfeldman.
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    A hole for Plastic pin of ethernet connector

    Thank you for your response. It means just by adjusting the hole size and disabling plated option ( even annual ring=0?) it works fine?
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    A hole for Plastic pin of ethernet connector

    Hello, Here the ethernet connector(https://www.kosmodrom.com.ua/pdf/HR911105A.pdf) that I am going to implement in Altium. I need to know that for plastic connector (phi=3.25) if my configuration is right. (hole size=3.25 , X/Y for round shape=2.5)
  9. B

    Updating footprint in PCB window after being changed in PCB library

    Thank you so much, it is somehow time-consuming because in my project that I have used multi-channel structure is so complex to do this procedure.
  10. B

    Updating footprint in PCB window after being changed in PCB library

    Hello, I designed my board in Altium designer. After checking the DRC I had to change a clearance in my PCB library. Howeve after doing that, updating my schematic librar and schematic, there was nothing to update into PCB window( it means changing a size,clearance, ... in PCB library which...
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    Changing room and component positions in Altium

    Hello, Here is my PCB file. I need to know why P1_1 and U2_1 don't move by changing their room position. In addition by selecting all components again, they don't move.(ROOM name :TCP1) Thank you.
  12. B

    Altium limitation in PCB window

    Hello, I need to know why I can't move my cursor more than -180 on the x-axis? Altium 20.
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    stm32f103c8t6 vs stm32f103cbt6 vs stm32f103c8t6 vs stm32f103re6

    Hello, I will appreciate if you could let me know the differences between stm32f103c8t6 vs stm32f103cbt6 vs stm32f103c8t6 vs stm32f103re6?
  14. B

    HanRun RJ45 pins postition

    Thank you so much for your help. Could you help me to design dp83848I?(https://www.ti.com/lit/ds/symlink/dp83848c.pdf) In the datasheet it doesn't mention the value of these parameters directly. Thanks
  15. B

    HanRun RJ45 pins postition

    Hello, In this picture I can't find the X position of pins of 1,3,5,7. I will thankful if you could help me. HanRUn911105A
  16. B

    Help me to detect an IC in a circuit

    Hello, In an encoder I guess this highlighted IC damaged but I can't find its part number correctly to see its datasheet. I am grateful if you could help me.
  17. B

    Class B wave form problem

    Hello, I am going to see the output waveform of class B amplifier. First of all, I tested this circuit For low frequency (200Hz-200Khz) I see this waveform at the output. But by increasing the frequency value up to 2Mhz, I see the input frequency exactly at the output without any disturbance(...
  18. B

    Frequency Multipier in ADS

    Thank you, how did the 4th harmonic of (354Mhz) generate with that high amplitude? the frequency multiplier mentioned it has low harmonics and IM components.
  19. B

    Frequency Multipier in ADS

    I changed and made my circuit bigger. Here is my present circuit (double mixer) (5X , 5X) I set my input frequency order in harmonic balance simulation about 150. As you can see in the first diagram everything is good but in the second stage strange frequency appeared. For example where did...
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    Frequency Multipier in ADS

    Yes , you are right. I made a mistake not to take into account the "Input" and "Output" words.

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