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Electro Tech is an online community (with over 170,000 members) who enjoy talking about and building electronic circuits, projects and gadgets. To participate you need to register. Registration is free. Click here to register now.

  • Welcome to our site! Electro Tech is an online community (with over 170,000 members) who enjoy talking about and building electronic circuits, projects and gadgets. To participate you need to register. Registration is free. Click here to register now.

Recent content by mg9

  1. M

    USB D+/D- trace routing

    Both D+ and D- line will run parallel to USB connector, and the gnd will be the reference plane, and i fill one side(i'm using double side PCB) with all the gnd as possible. I just concern if the via would cause any impedance discontinuity and would affect the eye diagram? Although this is...
  2. M

    USB D+/D- trace routing

    Dear all, I would like to seek your opinion on the USB signal trace routing. I'm using FR1 silver ink thru hole 1.0mm PWB, and the routing of the trace is as the attachment. Is it necessary to put 2 vias (as the attach file) instead of 1 via? My concern is the via is silver ink thru, not plated...
  3. M

    Amplitude of Xtal in to IC

    Hello, I'm not sure if this is OK or not::confused: I'm using PIC18F2450, and there's a xtal at Timer1. The amplitude at Timer1 input is typically 800mV, and at it worst case(temp change) can be at 500mV. Is this normal? Although it still can function properly, but I just worry this low...

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