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Recent content by zhk_xbox

  1. Z

    Four-pinned crystal 25MHz 25MHz 25.000MHz 3.2x2.5 3225 passive SMD quartz crystal osc

    The 4 pins crystal have VCC and GND pins more 2 pin crystal. And more accurate usually，1 pin N.C(No Connect);2 pin GND;3 pin Output;4 pin VCC(VDD)
  2. Z

    89s52 gets hangs because of relay

    U Can Do it like this: If BC547 Base connect to P0.1,Output Imax more than P1 Port, So U can serise 330Ω resistor between P0.1 to BC547 Base. .............................. BC547 collector connect 5V VCC BC547 Collector need connect VCC,don't connect relay. coz, The collector can withstand...
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